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7/27/2019 Goodyear Belts
1/44
P O W E R T R A N S M I S S I O N P R O D U C T S
INSTALLATION, MAINTENANCEANDTROUBLESHOOTING GUIDE
POWER TRANSMISSION BELT DRIVE SYSTEM
7/27/2019 Goodyear Belts
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DO NOT USE THE PRODUCTS IN THIS GUIDE IN AIRCRAFT APPLICATIONS.THE PRODUCTS IN THIS GUIDE ARE NOT INTENDED FOR USE INAIRCRAFT APPLICATIONS.
DO NOT USE THE PRODUCTS IN THIS GUIDE IN LIFT OR BRAKE SYSTEMSWHICH DO NOT HAVE AN INDEPENDENT SAFETY BACKUP SYSTEM. THEPRODUCTS IN THIS GUIDE ARE NOT INTENDED FOR USE IN LIFT ORBRAKE SYSTEMS WHICH DO NOT HAVE AN INDEPENDENT SAFETY
BACKUP SYSTEM.
FAILURE TO FOLLOW THESE WARNINGS AND THE PROPER PROCEDURESFOR SELECTION, INSTALLATION, CARE, MAINTENANCE AND STORAGE OFBELTS MAY RESULT IN THE BELTS FAILURE TO PERFORM PROPERLYAND MAY RESULT IN DAMAGE TO PROPERTY AND/OR SERIOUS INJURYOR DEATH.
The products in this Guide have been tested under controlled laboratoryconditions to meet specific test criteria. These tests are not intended to reflectperformance of the product or any other material in any specific application,but are intended to provide the user with application guidelines. The productsare intended for use by knowledgeable persons having the technical skillsnecessary to evaluate their suitability for specific applications. Goodyearassumes no responsibility for the accuracy of this information under variedconditions found in field use. The user has responsibility for exercising care inthe use of these products.
WARNING
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IN STALLATIO N G U IDE
Troubleshootingof Synchronous Belt Systems
Contents
INSTALLATION
V-BELTS
V-Belts ..............................................................4
BANDED BELTS
Torque Team V-Belts .........................................13Poly-V Belts .....................................................20
SPECIALTY BELTS
Variable Speed Belts .........................................26
SYNCHRONOUS BELTSSynchronous Belts ............................................28
MAINTENANCE
What To Look For ..............................................35What To Listen For ............................................36
TROUBLESHOOTING
V-Belt Performance Analysis ...............................37V-Belt Troubleshooting Chart ..............................39Synchronous Troubleshooting Chart ....................40
Poly-V and Torque Team are registered trademarks of The Goodyear Tire and Rubber Company
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V-BeltINSTALLATIO N GU IDE
3TANDARD'ROOVE$IMENSIONS $RIVE$ESIGN&ACTORS
$EEP'ROOVE$IMENSIONS
#ROSS3ECTION
#ROSS3ECTION
/UTSIDE
$IAMETER2ANGE
/UTSIDE$IAMETER2ANGE
'ROOVE
!NGLE BG
H
GMIN
2
"MIN
D
B
3G
3E
$ATUM
$IAMETER2ANGE
-INIMUM2ECOMMENDED
$ATUM$IAMETER A
'ROOVE
!NGLE
B G
HG
MIN A
3G
3E
!!8
""8
##8
$
%
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$
%
5P4HROUGH
/VER
5P4HROUGH
/VERTO)NCL
/VER
5P4HROUGH
/VER
5P4HROUGH
/VERTO)NCL
/VER
5P4HROUGH
/VER
5P4HROUGH
/VER
5P4HROUGH
/VERTO)NCL
/VER
5P4HROUGH
/VER
5P4HROUGH
/VERTO)NCL
/VER
5P4HROUGH
/VER
5P4HROUGH
/VER
5P4HROUGH
/VERTO)NCL
/VER
5P4HROUGH
/VERTO)NCL
/VER
5P4HROUGH/VER
!!8
""8
5P4HROUGH
/VER
5P4HROUGH
/VER
5P4HROUGH
/VER
5P4HROUGH
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!
!8"
"8
COMBINATION
a
GrooveAngle
File Break AllSharp C orners
Standard Groove Dimensions
Sg S e
h g
R B
d B
b g
Outside
Diameter
Datum
Diameter
Industry Standard Groove Dimensionsfor V-Belt Sheaves
Check sheaves for cleanliness, damage and wear each time belt
maintenance is performed and whenever belts are changed. The
inspection procedure is described on page 6 of this Guide.
U se the tables (Tables 1 and 2) and tolerance data below
as a reference to determine if excessive sheave wear has
occurred. They can also aid in replacement belt cross-section
selection, if necessary.
The tables are based on industry standard dimensions for V-beltsheaves. Always check the original sheave specifications if
possible. Variances from industry standards can occur to provide
for special design or performance requirements.
(1) Diameters shown for combination grooves are outside diameters.A specific datum diameter does not exist for either A or B belts in
combination grooves.
(2) The a values shown for the A/B combination sheaves are thegeometrically derived values. T hese values may be different than
those shown in manufacturers catalogs.
Summation of the deviations from Sg for all grooves in any one
sheave shall not exceed 0.050 inches.
The variation in datum diameter between the grooves in any one
sheave must be within the following limits:
U p through 19.9 inches outside diameter and up through 6 grooves:
0.010 i nches (add 0. 0005 inches for each additional groove.)
20.0 inches and over on outside diameter and up through 10
grooves: 0.015 inches (add 0.0005 inches for each additional groove.)
This variation can be obtained easily by measuring the distance across
two measuring balls or rods placed diametrically opposite each other
in a groove. Comparing this diameter over balls or rods measurement
between grooves will give the variation in datum diameter.
Deep groove sheaves are intended for drives with belt offset such as
quarter-turn or vertical shaft drives. (See RM A Power Transmission B elt
Technical Information B ulletin IP -3 -10, V-belt drives with twist) .
Joined belts will not operate in deep groove sheaves.
Also, A andAX joined belts will not operate in A /AX and B /BX combination grooves.
OTHER SHEAVE TOLERANCES
Outside DiameterU p through 8.0 inches
outside diameter.....0.020 inches
For each additional inch of outside
diameter add.....0.005 inches
Radial Runout**U p through 10.0 inches
outside diameter.....0.010 inches
For each additional inch of outside
diameter add.....0.0005 inches
Axial Runout**U p through 5.0 inches
outside diameter.....0.005 inches
For each additional inch of outside
diameter add.....0.001 inches
**Total Indicator Reading
TABLE 1 GROOVE DIMENSIONS INCHES
Face Width of Standard
and D eep Groove Sheaves
Face Width = Sg (N g 1) + 2 Se
Where:
Ng= Number of G rooves
7/27/2019 Goodyear Belts
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V-BeltIN STALLATIO N GU IDE
CrossSection
Standard GrooveO u t sid e D iam et e r
G ro o veAngle
0.25D e g r e e s
bg
0.005
b e
Ref.
hg
m in
RB
m in
dB
0.0005
Sg
0.015Se
Min imumR e c o m m e n d e d
O utsideD i a m e t e r 2a
CrossSection
Standard GrooveO u t si d e D i am et e r
G ro o ve
Angle0.25
D e g r e e s
bg
0.005
b e
Ref.
hg
m in
RB
m in
d B
0.0005
Sg
0.015Se
Min imum
R e c o m m e n d e dOutside
D i a m e t e r 2a 2he
Standa rd Groove Dime nsions Design Fac tors
Dee p G ro o ve D ime n sio n s De sign Fa ctors
3V
5V
8V
3V
5V
8V
Up Through 3.49
Over 3.49 To And
Including 6.00
Over 6.00 To And
Including 12.00
Over 12.00
Up Through 9.99
Over 9.99 To And
Including 16.00
Over 16.00
Up Through 15.99
Over 15.99 To And
Including 22.40
Over 22.40
Up Through 3.71
Over 3.71 To And
Including 6.22
Over 6.22 To And
Including 12.22
Over 12.22
Up Through 10.31
Over 10.31 To And
Including 16.32
Over 16.32
Up Through 16.51
Over 16.51 To And
Including 22.92
Over 22.92
36
38
40
42
38
40
42
38
40
42
36
38
40
42
38
40
42
38
40
42
0.350
0.600
1.000
0.350
0.600
1.000
0.340
0.590
1.990
0.181
0.183
0.186
0.188
0.329
0.332
0.336
0.575
0.580
0.585
0.3438
0.5938
1.0000
0.406
0.688
1.125
0.344
+0.094
-0.031
0.500
+0.125
-0.047
0.750
+0.250
-0.062
2.65
7.10
12.50
0
0
0
0.421
0.425
0.429
0.434
0.710
0.716
0.723
1.180
1.191
1.201
0.350
0.600
1.000
0.449
0.750
1.262
0.070
0.073
0.076
0.078
0.168
0.172
0.175
0.312
0.316
0.321
0.3438
0.5938
1.000
0.500
0.812
1.312
0.375
+0.094
-0.031
0.562
+0.125
-0.047
0.844
+0.250
-0.062
2.87
7.42
13.02
0.050
0.100
0.200
0.218
0.320
0.524
GrooveAngle
EffectiveandOutside
Diameter
Pitch
Diameter
a
File Break AllSharp
Corners
SgSe
hg
R B
dB
b e
b g
hg R B
Se Sg
dB
GrooveAngle
File Break AllSharp
Corners
b e
b g
a
h e
Effective
Diameter
Pitch
Diameter
Outside
Diameter
Deep Groove DimensionsStandard Groove Dimensions
Summation of the deviations from Sg for all grooves in any one sheaveshall not exceed 0. 031 inch. The variations in pitch diam eter between
the grooves in any one sheave must be within the following limits:
U p through 19.9 inches outside diameter and up through 6 grooves
0.010 inches (Add 0.0005 inches for each additional groove.)
20.0 inches and over on outside diameter and up through 10 grooves
0.015 i nches (add 0. 0005 inches for each additional groove.)
This variation can easily be obtained by measuring the distance across
two measuring balls or rods placed in the grooves diametrically opposite
each other. Comparing this diameter over balls or rods measurement
between grooves will give the variation in pitch diameter.
Deep groove sheaves are intended for drives with belt offset such
as quarter-turn or vertical shaft drives. ( See Power Transmission B elt
Technical Information Bulletin IP -3-10) They may also be necessary where
oscillations in the center distance may occur. Joined belts will not operate
in deep groove sheaves.
OTHER SHEAVE TOLERANCESOutside DiameterU p through 8.0 inches outside diameter... .. 0.020 inches
For each additional inch of outside diameter add.....0.005 inches
Radial Runout**U p through 10.0 inches outside diameter.. .. .0.010 inches
For each additional inch of outside diameter add.....0.0005 inches
Axial Runout**U p through 5.0 inches outside diameter... .. 0.005 inches
For each additional inch of outside diameter add.....0.001 inches
**Total Indicator Reading
Industry Standard Groove Dimensions for Hy-T Wedge Belt Drives
Face Width of Standard
and D eep Groove Sheaves
Face Width = Sg (N g 1) + 2 SeWhere:Ng= Number of Grooves
TABLE 2 GROOVE DIMENSIONS INCHES
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V-BeltINSTALLATIO N GU IDE
INSPECT SHEAVES
The following sections outline installation procedures that will
ensure maximum li fe and performance for your Goodyear V-belts.
Check sheaves for cleanliness, damage, and wear whether you
are replacing an existing belt, performing routine maintenance, or
installing a new drive.
Sheave Groove Gauge
PO
13.0t
o1
7.0
36
PO
Over17.0
38
PO12.0 to 12.99
34
StandardD
Sect ion
LIKE THIS N O T THIS
An alternative method for checking for sheave groove wear is to
place a new belt in the sheave groove. Note that the top of the belt
should be flush with or slightly above the outer diameter of the
sheave. R emember that if the belt top is below the sheaves outer
diameter, the groove is worn.
Perform further inspection if possible. Use the Groove Dimension
tables located on pages 4 and 5 of this manual to determine if
excessive wear has occurred or to select replacement belts and
sheave cross sections.
INSTALL HARDWARE
Always remember to select the correct sheave. T hen, after you
make the correct selection, be sure to install the sheaves correctly
B efore performi ng any installation, follow correct lockou
procedures to prevent any accidents.
IMPORTANT: Disconnect power supply to machine before doing
AN Y work.
QD Bushing
I f the sheaves are made with a Q D hub, follow these installation
and removal instructions.
HOW TOINSTALL A SHEAVE WITH A QDHUB
Insert the bushing in the hub and line up bolt holes.
Insert the pull-up bolts and turn unti l finger tight.
H old the loosely assembled uni t so the bushing flangepoints toward the shaft bearings. R everse mounting the QD
bushing can be advantageous for some applications.
Slip the unit onto the shaft and align the hub in the desired position.
Tighten the setscrew in the flange only enough to hold the assembly
in position.
Tighten each pull-up bolt alternately and evenly.
Recheck alignment and completely tighten the setscrew on the shaft
U se a stiff brush to remove rust and dirt. U se a soft cloth to wipe
off oil and grease. Select the proper sheave groove gauge and
template for the sheave diameter. Insert the gauge in the groove
and look for voids that indicate dishing or other uneven and
abnormal wear.
Thru Holes
Pull-Up Bolts
Flange
TappedHoles
Setscrew
Key
ShaftQ D BUSHING (C onve ntiona l M ount)
Sheave Hub
*QD is a registered Trademark of Emerson P ower Transmission M anufacturing, L. P.
WARNINGDisconnect power supply to the machine before removing
or installing sheaves or belts.
WARNINGDo not reinstall damaged or worn sheaves on equipment.
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V-BeltIN STALLATIO N GU IDE
Split Taper Bushing
I f the sheaves are made for split taper bushings, follow these
installation and removal instructions.
HOW TOINSTALL SPLIT TAPER BUSHING SHEAVES
P ut the bushing loosely in the sheave and start the capscrews.
Place the assembly on the shaft. A lign both edges of the sheave with
the edges of its mating sheave ( i.e. the sheave on the driven shaft) .
Tighten the capscrews according to the instructions furnished withthe bushings.
HOW TOREMOVE SPLIT TAPER BUSHING SHEAVES
Remove all capscrews.
Put two of the capscrews in the tapped holes in the flange of the
bushing.
Turn the bolts alternately and evenly until the sheave has loosened.
Remove the sheave/flange assembly from the shaft.
Taper-Lock Bushing
HOW TOINSTALL A SHEAVE MADEWITH A TAPER-LOCK HUB
Look at the bushing and the hub. Each has a set of half-holes. T he
threaded holes in the hub are the mates to the non-threaded holes
in the bushing.
Insert the bushing in the hub and slide it onto the shaft. Align a
threaded hub hole with non-threaded bushing hole.
Start the setscrews into the holes that are threaded in the hub only
Do not tighten the setscrews yet.
Align both edges of the sheave with the edges of its mating sheave.
Tighten the screws alternately and evenly. T his procedure wil
wedge the bushing inward and cause it to contract evenly and grip
the shaft.
HOW TOREMOVE A SHEAVE MADEWITH A TAPER-LOCK HUB
Remove all the setscrews.
P lace two of the setscrews in the holes that are threaded in the
bushing only.
Turn the setscrews alternately and evenly. This movement wil
unlock the grip and permit easy removal of the assembly with no
shock to the bearings or machinery.
Non-Threaded Hub Hole
Threaded Bushing Hole(Used to remove sheave)
Bushing
Setscrews
*Taper-Lock: TM Reliance Electric Company
Sheave Hub
HOW TOREMOVE A SHEAVE WITH A QD HUB
P lace two of the pull-up bolts in the tapped holes in the sheave.
Turn the bolts alternately and evenly. They will push against the
bushing flange and act as jackscrews to break the grip between the
bushing and the hub.
Thru Holes
Capscrews
Bushing
Flange
Sheave
Tapped
Holes
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V-BeltINSTALLATIO N GU IDE
CHECK ALIGNMENT
Proper alignment is essential for long V-belt life. Check belt
alignment whenever you maintain or replace belts or whenever you
remove or install sheaves.
The illustration above shows the correct way to check alignment
between two sheaves with a straight edge. Check both front and
back alignment. Straight edge should touch sheaves at the four
points indicated.
N on-parallel shafts or sheaves not aligned axially can cause
angular misalignment.
Laser Alignment Tool
Goodyears Laser Alignment Tool provides an alternative to checking
alignment with a straight edge. Each laser alignment tool comes
with a rugged carrying case and detailed instructions to get you
started with the quickest, easiest, and most versatile alignment tool
on the market today.
IDENTIFY CORRECT BELT
Always select belts to match sheave grooves. Use a sheave groove
gauge to determine the proper belt cross section. (Fig. A) .
U se a belt gauge to verify the old belt cross section when bel
identification is no longer legible. ( Fig. B) .
MATCHING BELTS
When using multiple grooved sheaves, be sure that all of the beltsare the same brand. Always replace complete sets of V-Belts even
if only one is worn or damaged.
HOW TOINSTALL BELTS
After you correctly install and align the sheaves, you can instal
the belts.
Always move the drive unit so you can easily slip the belts into
the grooves without force.
(Fig. A) . (Fig. B) .
1
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V-BeltIN STALLATIO N GU IDE
Never force belts into a sheave with a tool such as a screwdr iver
or a wedge. D oing so may rupture the envelop fabric or break
the cords.
Refer to Tables 3 and 4 to determine if enough clearance exists
for belt installation and tak e-up.
For example, i f you are installing a B 75 H y-T plus belt, the
minimum allowable center distance for installation is 1.25 inches.
For belt take-up, the minimum allowance above center to maintain
tension is 2 inches.
M inim um A l low a nce BelowStand ard Ce nter Distanc e for Instal lat ion o f Belts
Up to and Incl. 35
Over 35 to and Inc l. 55
Over 55 to and Inc l. 85
Over 300 to and Incl. 390
Over 390
Over 85 to and Incl. 112
Over 112 to and Incl. 144
Over 144 to and Incl. 180
M inum um A l low anceA b o v e St a n d a r d C e n te r
Distanc e for Ma intaining Tension
All Cross SectionsStandard
Le ng th De sig na tio n A B
BTorqueTea m C
CTorqueTeam D
DTorqueTeam E
Over 180 to and Incl. 210
Over 210 to and Incl. 240
Over 240 to and Incl. 300
0.75
0.75
0.75
1.00
1.00
1.25
1.50
1.50
1.60
1.50
1.50
2.00
2.00
1.00
1.00
1.25
1.25
1.25
1.60
1.80
1.80
1.50
1.50
2.00
2.00
2.10
2.20
2.00
2.00
2.90
3.00 2.50
1.50
1.50
1.50
1.90
2.00
2.20
2.00
2.00
2.00
2.30
2.50
2.50
2.00
2.50
2.50
3.20
3.20
3.50
2.50
2.50
3.00
2.00
2.50
2.70
2.90
2.60
3.00
3.60
4.10
3.00
3.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
6.00
1.5% of belt length
Table 3 Hy-T Plus V-Belts
M inim um A l low a nce Below S tanda rd C enter D istancefor Installa tion of Be lts, Inche s
Up to and Incl. 475
Over 475 to a nd Inc l. 710
Over 710 to and Incl. 1060
Over 1060 to and Incl. 1250
Over 1250 to and Incl. 1700
Over 1700 to and Incl. 2000
M i n u m u m A ll o w a n c eA bove Standa rd C enter D istance
for Maintaining Tension, Inch esAll Cross Sections
StandardLeng th Designation 3V
3VTorqueTeam
Over 2000 to and Incl. 2360
Over 2360 to and Incl. 2650
Over 2650 to and Incl. 3000
0.5
0.8
0.8
1.2
1.4
1.4
1.0
1.0
2.1
2.1 1.5
0.8
0.8
1.4
1.4
1.0
1.0
1.0
2.1
2.1
2.1
1.5
1.5
1.8
1.2
1.2
1.2
2.4
2.4
2.4
1.8
1.8
1.8
1.0
1.2
1.5
1.8
2.2
2.5
3.0
3.2
3.5
Over 3000 to a nd Inc l. 3550
Over 3550 to a nd Inc l. 3750
Over 3750 to and Incl. 5000
1.2 2.4 2.0
2.0
2.0
4.0
4.5
5.5
5V
5VTorqueTeam 8V
8VTorqueTeam
3.4
3.4
3.4
3.6
3.6
3.6
3.6
4.0
4.0
4.0
Table 4 Hy-T Wedge V-Belts
3HORTER#ENTER$ISTANCEFOR6BELTINSTALLATION
,ONGER#ENTER$ISTANCEFOR6BELT4AKE5P
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V-BeltINSTALLATIO N GU IDE
Tensioning Methods
When you install belts at optimal tension, you save time and money
To i llustrate this point, this table compares the cost and accuracy o
various V-belt tensioning methods.
Choose one of three tensioning methods for V-Belts:
TensionRite
Two TensionR ite gauges are available: one for single belt drives
and another for banded belt drives.
For more detailed instructions for using TensionR ite, refer to the
instructions attached to gauge.
100%
80%
60%
40%
20%
0%
$1,500
$1,200
$900
$600
$300
$0
64%
90%
99%93%
$1,200
$80
Averag e % Ac curac y and Co st of Tensioning Devices
PERCENTACCURACY
CO
ST
Thumb test Plunger Frequency
Tester
TensionRite
Percent Accuracy Cost ($)
$0 $0
TENSION
Proper tension is essential for maximum belt life and efficiency.
Improper belt tension is the primary cause of premature
belt failure and increased costs. U nder-tensioned belts lead to
slippage, overheating, rollover and noise, all of which lead to
higher maintenance costs and inefficient transmission of power.
Also, over tensioning belts leads to premature wear, along with
bearing, shaft, and sheave problems. T he result is more frequent
replacement of drive components and costly downtime.
Common Sense Rules of VBelt Tensioning
The ideal tension is the lowest tension at which the belt will not slip
under peak load conditions.
Check the belt tension frequently during the first 24-48 hours of
run-in operation.
Do not over tension belts. Doing so will shorten belt and bearing life.
K eep belts free from foreign materials that may cause slippage.
Inspect the V-drive periodically. Re-tension the belts if they
are slipping.M aintain sheave alignment with a strong straight-edge tool while
tensioning V-belts.
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V-BeltIN STALLATIO N GU IDE
TensionRite Belt Frequency Meter
The TensionR ite B elt Frequency M eter belt tensioning device
measures actual belt tension or frequency and works with all
industrial transmission belts including V-belts, synchronous belts,
and Poly-V belts.
Details about the TensionR ite B elt Frequency M eter can be
found on the web at www.goodyearindustrialproducts.com. O rcontact your local Goodyear authorized distributor.
Deflection Principle
Plunger-type gauges utilize the deflection principle to check the
tension of a belt drive.
Compare the actual deflection force with the values in Tables 5
and 6. A force below the target value indicates under-tension
A force above the target indicates over-tension.
The gauge deflects the center of the belt span and the force of this
deflection is compared to a target deflection force for the particular
span. T hen, one can adjust the belt tension unti l the actual
deflection force equals the target.
Deflection1/64 per
inch of span
#ROSS3ECTION
3MALLEST3HEAVE$IAMETER2ANGE
!!8
20-2ANGE
5SED"ELT
.EW"ELT
5SED"ELT
.EW"ELT
5NCOGGED(Y4"ELTSAND5NCOGGED
(Y44ORQUE4EAM
#OGGED4ORQUE&LEX
AND-ACHINED%DGE4ORQUE4EAM"ELTS
"ELT$EFLECTION&ORCE0OUNDS
""8
##8
$
#ROSS3ECTION
3MALLEST3HEAVE$IAMETER2ANGE
668
20-2ANGE
5SED"ELT
.EW"ELT
5SED"ELT
.EW"ELT
5NCOGGED(Y47EDGE"ELTSAND5NCOGGED(Y47EDGE4ORQUE4EAM
#OGGED(Y47EDGE"ELTS
AND(Y47EDGE-ACHINE%DGE4ORQUE4EAM
"ELT$EFLECTION&ORCE0OUNDS
668
6
Table 5
Table 6
M easure the span length.
M ark the center of the span. At the center mark , use a tension
tester and apply a force perpendicular to the span large enough to
deflect the belt 1/64" for every inch of span length (Ex: a 100" span
requires a deflection of 100/64" or 1 9/16") .
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V-BeltIN STALLATIO N G U IDE
12
The following few sections detail other issues that could ariseduring V-belt drive installation.
BELT GUARDS
V-belt drive guards ensure cleanliness and safety. Screened,
meshed, or grilled guards are preferable because they allow for
air circulation and heat escape.
IDLERS
Avoid the use of idlers if at all possible. A properly designed V-belt
drive will not require an idler to deliver fully rated horsepower.
Idlers put an additional bending stress point on belts, which
reduces a belts horsepower rating and i ts life. Also, remember the
smaller the idler, the greater the stress and the shorter a belts life.
However, if the drive design requires an idler, observe the following
design recommendations.
Inside Idler
A V-grooved idler located on the inside of the belts on the slack side
of the drive is preferable to a back side idler. Locate the idler near
the large sheave to avoid reduction of the arc of contact with
the small sheave. N ote that the size of the V-idler pulley should beequal to or larger (preferably) than the diameter of the small sheave.
4
5
Back Side Idler
A back side idler increases the arc of contact on both sheaves
However, such an idler also forces a backward bend in the V-bel
which contributes to unwanted wear such as bottom cracking
and premature failure. If a back side idler is the only option, follow
two guidelines: ( 1) mak e sure the diameter of the flat idler pulle
is at least 1.5 times the diameter of the small sheave and (2
locate the back side idler as close as possible to the small sheave o
the slack side.
Kiss Idler
Unlik e the back side idler, the kiss idler does not penetrate the be
span and create a back bend. Consequently, the kiss idler does no
contribute to premature failure. T he kiss idler can help control be
vibration and whip on drives subject to shock and pulsating loads
When using a k iss idler, make sure the diameter of the flat pulley is a
least 1.5 times the diameter of the small sheave on the slack side.
7/27/2019 Goodyear Belts
13/44
INSTALLATIO N G UI DE
Torque Team V-Belt
INSPECT SHEAVES
The following sections outline installation procedures that will en-
sure maximum life and performance for your Goodyear Torque
Team V-Belts.
Check sheaves for cleanliness, damage, and wear whether you
are replacing an existing belt, performing routine maintenance, or
installing a new drive.
Sheave Groove Gauge
PO
13.0t
o1
7.0
36
PO
Over17.0
38
PO12.0 to 12.99
34
Standard
DSect ion
U se a stiff brush to remove rust and dirt. U se a soft cloth to wipe
off oil and grease. Select the proper sheave groove gauge and
template for the sheave diameter. Insert the gauge in the groove
and look for voids that indicate dishing or other uneven and
abnormal wear.
INSTALL HARDWARE
Always remember to select the correct sheave. Then, after you
make the correct selection, be sure to install the sheaves correctly
Before performing any installation, follow correct lockou
procedures to prevent any accidents.
IMPORTANT: Disconnect power supply to machine before doing
AN Y work.
QD Bushing
I f the sheaves are made with a Q D hub, follow these installation
and removal instructions.
HOW TOINSTALL A SHEAVE WITH A QD HUB
Insert the bushing in the hub and line up bolt holes.
Insert the pull-up bolts and turn unti l finger tight.
Hold the loosely assembled unit so the bushing flange points
toward the shaft bearings. Reverse mounting the QD
bushing can
be advantageous for some applications.
Slip the unit onto the shaft and align the hub in the desired position
Tighten the setscrew in the flange only enough to hold the assembly
in position.
Tighten each pull-up bolt alternately and evenly.
R echeck ali gnment and completely tighten the setscrew on
the shaft.
Thru Holes
Pull-Up Bolts
Flange
TappedHoles
Setscrew
Key
ShaftQ D BUSHING ( Co nventional M ount)
Sheave Hub
*QD is a registered Trademark of Em erson Power Transmission M anufacturing, L. P.
WARNINGDisconnect power supply to the machine before removing
or installing sheaves or belts.
WARNINGDo not reinstall damaged or worn sheaves on equipment.
7/27/2019 Goodyear Belts
14/4414
Torque Team V-BeltINSTALLATIO N G U IDE
Split Taper Bushing
If the sheaves are made for split taper bushings, follow these
installation and removal instructions.
HOW TOINSTALL SPLIT TAPER BUSHING SHEAVES
Put the bushing loosely in the sheave and start the capscrews.
Place the assembly on the shaft. A lign both edges of the sheave with
the edges of its mating sheave ( i. e. the sheave on the driven shaft) .
Tighten the capscrews according to the instructions furnished withthe bushings.
HOW TOREMOVE SPLIT TAPER BUSHING SHEAVES
Remove all capscrews.
P ut two of the capscrews in the tapped holes in the flange of
the bushing.
Turn the bolts alternately and evenly until the sheave has loosened.
Remove the sheave/flange assembly from the shaft.
Taper-Lock Bushing
HOW TOINSTALL A SHEAVE MADEWITH A TAPER-LOCK HUB
Look at the bushing and the hub. Each has a set of half-holes. T he
threaded holes in the hub are the mates to the non-threaded holes
in the bushing.
Insert the bushing in the hub and slide it onto the shaft. Align a
threaded hub hole with non-threaded bushing hole.
Start the setscrews into the holes that are threaded in the hub only
Do not tighten the setscrews yet.
Align both edges of the sheave with the edges of its matingsheave.
Tighten the screws alternately and evenly. T his procedure wil
wedge the bushing inward and cause it to contract evenly and grip
the shaft.
HOW TOREMOVE A SHEAVE MADEWITH A TAPER-LOCK HUB
Remove all the setscrews.
P lace two of the setscrews in the holes that are threaded in the
bushing only.
Turn the setscrews alternately and evenly. T his movement wil
unlock the grip and permit easy removal of the assembly with noshock to the bearings or machinery.
Non-Threaded Hub Hole
Threaded Bushing Hole(Used to remove sheave)
Bushing
Setscrews
*Taper-Lock: TM Reliance Electric Company
Sheave Hub
Thru Holes
Capscrews
Bushing
Flange
Sheave
Tapped
Holes
HOW TOREMOVE A SHEAVE WITH A QD HUB
P lace two of the pull-up bolts in the tapped holes in the sheave.
Turn the bolts alternately and evenly. T hey will push against the
bushing flange and act as jackscrews to break the grip between the
bushing and the hub.
7/27/2019 Goodyear Belts
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INSTALLATIO N G U IDE
Torque Team V-Belt
CHECK ALIGNMENT
Proper alignment is essential for long Torque Team V-Belt life.
Check belt alignment whenever you maintain or replace belts or
whenever you remove or install sheaves.
The illustration above shows the correct way to check alignment
between two sheaves with a straight edge. Check both front and
back alignment. Straight edge should touch sheaves at the four
points indicated.
N on-parallel shafts or sheaves not aligned axially can cause
angular misalignment.
Laser Alignment Tool
Goodyears Laser Alignment Tool provides an alternative to checking
alignment with a straight edge. Each laser alignment tool comes
with a rugged carrying case and detailed instructions to get you
started with the quickest, easiest, and most versatile alignment tool
on the market today.
IDENTIFY CORRECT BELT
Always select belts to match sheave grooves. Use a sheave groove
gauge to determine the proper belt cross section (Fig. A ) . M ake
sure that the space between the grooves in the sheaves matches
the spacing between belt ribs. Do not use Torque Team belts in
deep groove sheaves; such sheaves could cut through the back ing
that holds the ribs together.U se a belt gauge to verify the old belt cross section when bel
identification is no longer legible (Fig. B ) .
(Fig. A). (Fig. B) .
MATCHING BELTS
Banded Torque Team V-belts eliminate belt whip and turnove
problems experienced with multiple V-belt sets under certain drive
conditions. The individual ribs in the Torque Team Belts are
produced at the same time and bonded together. T hus, ordering
matched sets of individual V- belts is unnecessary.
U sing more than one set of Torque Team belts on the same drive
is possible. For example, 2/5V1250 and 3/5V1250 Torque Team
belts will transmit the same power as five individual 5V1250
V-belts. T he 2/5V1250 identifi cation describes a Torque Team bel
with two 5V1250 individual V-belts joined together.
Dont M ix Belt Brands.
DO NOT use sets from different manufacturers together as they
may have different performance characteristics.
Dont M ix N ew and Used Belts.
Like single V-belts, DO NOT use new and used Torque Team belt
in combined sets.
Dont use Torque Team Plus belts in combined sets unless they are
matched by the factory.
1
7/27/2019 Goodyear Belts
16/4416
Torque Team V-BeltINSTALLATIO N G U IDE
HOW TOINSTALL TORQUE TEAM BELTS
Never force Torque Team belts into a sheave. Instead, decrease
the center distance between the sheaves, allowing the belt to slip
easily into the sheave grooves.
To tension a newly installed Torque Team belt, increase the
center distance between the sheaves. Tables 7 and 8 detail center
distance allowances for installation and tensioning of Classical andHY-T Wedge Torque Team belts. For example, a 5/5V1250 Torque
Team belt requires decreasing the center distance 2.1 inches to
install the belt and increasing the center distance 1.8 inches to
maintain sufficient tension.
M inim um A l low a nce BelowStand ard Ce nter Distanc e for Insta l lat ion of Belts
Up to and Incl. 35
Over 35 to and Incl. 55
Over 55 to and Incl. 85
Over 300 to and Incl. 390
Over 390
Over 85 to and Incl. 112
Over 112 to a nd Inc l. 144
Over 144 to a nd Inc l. 180
M inum um A l low anceA b o v e St a n d a r d C e n t e r
Distanc e for M aintaining Tension
All Cross Sec tionsStandard
Le ng th De sig na tio n A B
BTorqueTea m C
CTorqueTeam D
DTorqueTeam E
Over 180 to a nd Inc l. 210
Over 210 to a nd Inc l. 240
Over 240 to a nd Inc l. 300
0.75
0.75
0.75
1.00
1.00
1.25
1.50
1.50
1.60
1.50
1.50
2.00
2.00
1.00
1.00
1.25
1.25
1.25
1.60
1.80
1.80
1.50
1.50
2.00
2.00
2.10
2.20
2.00
2.00
2.90
3.00 2.50
1.50
1.50
1.50
1.90
2.00
2.20
2.00
2.00
2.00
2.30
2.50
2.50
2.00
2.50
2.50
3.20
3.20
3.50
2.50
2.50
3.00
2.00
2.50
2.70
2.90
2.60
3.00
3.60
4.10
3.00
3.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
6.00
1.5% of belt length
Table 7 Hy-T Plus V-Belts
M inim um A l low a nce Below S tand ard C enter D istancefor Installation of Belts, Inches
Up to and Incl. 475
Over 475 to and Incl. 710
Over 710 to and Inc l. 1060
Over 1060 to and Incl. 1250
Over 1250 to and Incl. 1700
Over 1700 to and Incl. 2000
M inum um A l low anceA bove Standa rd C enter D istance
for Maintaining Tension, Inche sAll Cross Sections
StandardLeng th Designation 3V
3VTorqueTeam
Over 2000 to and Incl. 2360
Over 2360 to and Incl. 2650Over 2650 to and Incl. 3000
0.5
0.8
0.8
1.2
1.4
1.4
1.0
1.0
2.1
2.1 1.5
0.8
0.8
1.4
1.4
1.0
1.0
1.0
2.1
2.1
2.1
1.5
1.5
1.8
1.2
1.21.2
2.4
2.42.4
1.8
1.81.8
1.0
1.2
1.5
1.8
2.2
2.5
3.0
3.23.5
Over 3000 to and Incl. 3550
Over 3550 to and Incl. 3750
Over 3750 to and Incl. 5000
1.2 2.4 2.0
2.0
2.0
4.0
4.5
5.5
5V
5VTorqueTeam 8V
8VTorqueTeam
3.4
3.4
3.4
3.6
3.6
3.63.6
4.0
4.0
4.0
Table 8 Hy-T Wedge V-Belts
3HORTER#ENTER$ISTANCEFOR6BELTINSTALLATION
,ONGER#ENTER$ISTANCEFOR6BELT4AKE5P
7/27/2019 Goodyear Belts
17/44
INSTALLATIO N G U IDE
Torque Team V-Belt
TENSION
Proper tension is essential for maximum belt life and efficiency.
Improper belt tension is the primary cause of premature belt failure
and i ncreased costs. U nder-tensioned belts lead to slippage,
overheating, and noise, all of which lead to higher maintenance
costs and inefficient transmission of power. A lso, over tensioning
belts leads to premature wear, along with bearing, shaft, and sheaveproblems. The result is more frequent replacement of drive components
and costly downtime.
Common Sense Rules of Torque TeambeltTensioning
The ideal tension is the lowest tension at which the belt will not slip
under peak load conditions.
Check the belt tension frequently during the first 24-48 hours of
run-in operation.
Do not over tension belts. Doing so will shorten belt and bearing life.
K eep belts free from foreign materials that may cause slippage.
Inspect the Torque Team drive periodically. Re-tension the belts ifthey are slipping.
M aintain sheave alignment with a strong straight-edge tool while
tensioning Torque Team belts.
Tensioning Methods
When you install belts at optimal tension, you save time and money.
To illustrate this point, the figure below compares the cost and
accuracy of various V-belt drive tensioning methods.
100%
80%
60%
40%
20%
0%
$1,500
$1,200
$900
$600
$300
$0
64%
90%
99%93%
$1,200
$80
Averag e % Ac curac y and C ost of Tensioning Devices
PERCENTACCURACY
CO
ST
Thumb test Plunger Frequency
Tester
TensionRite
Percent Accuracy Cost ($)
$0 $0
TensionRite Belt Frequency Meter
T he TensionR ite B elt Frequency M eter belt tensioning device
measures actual belt tension or frequency and works with a
industrial transmission belts including V-belts, synchronous belts
and P oly-V belts.
Details about the TensionR ite Belt Frequency M eter can be
found on the web at www.goodyearindustrialproducts.com. Ocontact your local Goodyear authorized distributor.
Deflection Principle
Plunger-type gauges utilize the deflection principle to check th
tension of a belt drive.
Choose one of four tensioning methods for V-Belts:
TensionRite
Two TensionR ite gauges are available: one for single belt drives
and another for banded belt drives.
For more detailed instructions for using TensionR ite, refer to the
instructions attached to gauge.
The gauge deflects the center of the belt span and the force of thi
deflection is compared to a target deflection force for the particula
span. T hen, one can adjust the belt tension unti l the actua
deflection force equals the target.
1
7/27/2019 Goodyear Belts
18/4418
Torque Team V-BeltINSTALLATIO N G U IDE
#ROSS3ECTION
3MALLEST3HEAVE$IAMETER2ANGE
!!8
20-2ANGE
5SED"ELT
.EW"ELT
5SED"ELT
.EW"ELT
5NCOGGED(Y4"ELTSAND5NCOGGED
(Y44ORQUE4EAM
#OGGED4ORQUE&LEX
AND-ACHINED%DGE4ORQUE4EAM"ELTS
"ELT$EFLECTION&ORCE0OUNDS
""8
##8
$
#ROSS3ECTION
3MALLEST3HEAVE$IAMETER2ANGE
668
20-2ANGE
5SED"ELT
.EW"ELT
5SED"ELT
.EW"ELT
5NCOGGED(Y47EDGE"ELTSAND5NCOGGED(Y47EDGE4ORQUE4EAM
#OGGED(Y47EDGE"ELTS
AND(Y47EDGE-ACHINE%DGE4ORQUE4EAM
"ELT$EFLECTION&ORCE0OUNDS
668
6
Elongation Method
When the deflection force required for the Deflection M ethod
becomes impractical for large Torque Team belts, use the
elongation method.
Imagine the Torque Team belt as a very stiff spring, where a
known amount of tension results in a known amount of elongation
The modulus of the Torque Team belt is like the spring constant o
a spring and is used to relate the elongation to the tension in thebelt. The Elongation M ethod calculates the belt length associated
with the required installation tension.
A gage length is defined and used as a point of reference for
measuring belt elongation. The gage length could be the outside
circumference of the belt or the span ( or part of the span) length
The ini tial gage length is measured with no belt tension.
The relationship between belt elongation and strand tension fo
one rib in a Torque Team B elt can be found by using the formula
below, where the M odulus Factors are given in Table 11.
Cross Sec tion
Modulus Fac tor
(lbs/in/in)
3V, 3VX
14270
5V, 5VX
25622
8V
55548
B, BX
28547
C, CX
43440
D
58882
Deflection1/64 per
inch of span
M easure the span length.
M ark the center of the span. At the center mark , use a tension
tester and apply a force perpendicular to the span large enough to
deflect the belt 1/64" for every inch of span length (Ex: a 100" span
requires a deflection of 100/64" or 1 9/16") .
Compare the actual deflection force with the values in Tables
9 and 10. A force below the target value indicates under-tension. A
force above the target indicates over-tension.
TABLE 9 - BELT DEFLECTION FORCE
TABLE 10 - BELT DEFLECTION FORCE
TABLE 11
Strand Tension per rib
M odulus Factor1 +Belt Length M ultiplier =
7/27/2019 Goodyear Belts
19/44
INSTALLATIO N G U IDE
Torque Team V-Belt
Enter the required strand installation tension per rib into the
formula, along with the M odulus Factor that corresponds to the
cross section of the Torque Team belt, to determine the Belt Length
M ultiplier.
M ultiply the gage length by the Belt Length M ultiplier to determine
the final gage length at the installation tension.
Example:
A 5/5V1250 belt is to be installed at 1400 lbs. The M odulus Factor
is 25622 lbs/in/in from table 11. The installation force is divided by
the number of ribs in the Torque Team (1400/5 = 280 lbs) . The
Belt Length M ultiplier is calculated next.
Belt Length M ultiplier = 1 + 280/25622 = 1.0109
Outside B elt Circumference at installation tension = 1.0109 x 125
= 126.4 inches.
In other words, the belt is elongated 1.4 inches at installation tension.
These multipliers do not apply to Torque Team P lus belts.
Inside Idler
A V-grooved idler located on the inside of the belts on the slack
side of the drive is preferable to a back side idler. Locate the idle
near the large sheave to avoid reduction of the arc of contact with
the small sheave. Note that the size of the V-idler pulley should
be equal to or larger (preferably) than the diameter of the sma
sheave.
Back Side Idler
A back side idler increases the arc of contact on both sheaves
However, such an idler also forces a backward bend in the V-belt
which contributes to unwanted wear such as bottom cracking and
premature failure. If a back side idler is the only option, follow two
guidelines: (1) make sure the diameter of the flat idler pulley is
at least 1.5 times the diameter of the small sheave and (2) locate
the back side idler as close as possible to the small sheave on the
slack side.
The following few sections detail other issues that could arise
during Torque Team V-Belt drive installation.
BELT GUARDS
IDLERS
Avoid the use of idlers if at all possible. A properly designed Torque
Team V-belt drive will not require an idler to deliver fully rated
horsepower. Idlers put an additional bending stress point on
belts, which reduces a belts horsepower rating and its life. Also,
remember the smaller the idler, the greater the stress and the
shorter a belts life. H owever, if the drive design requires an idler,
observe the following design recommendations.
Kiss Idler
U nlik e the back side idler, the kiss idler does not penetrate the
belt span and create a back bend. Consequently, the kiss idler doe
not contribute to premature failure. T he kiss idler can help contro
belt vibration and whip on drives subject to shock and pulsating
loads. When using a k iss idler, mak e sure the diameter of the
flat pulley is at least 1.5 times the diameter of the small sheave on
the slack side.
V-belt drive guards ensure cleanliness and safety. Screened,
meshed, or grilled guards are preferable because they allow for aircirculation and heat escape.
7/27/2019 Goodyear Belts
20/4420
Poly-V BeltIN STALLATIO N GU IDE
Inspect Sheaves
The following sections outline installation procedures that will
ensure maximum life and performance for your Goodyear Poly-V belts.
Check sheaves for cleanliness, damage, and wear whether you
are replacing an existing belt, performing routine maintenance, or
installing a new drive.
M o t o rN a m e p l a t e
H orsepow er
M INIM UM RECO M M ENDED SMA LL SHEAVE DIAM ETERSFOR ELECTRIC M O TORS (FOR POLY-V & V -BELT DRIVES)
1.251.251.502.002.252.25
STAND ARD M OTOR R.P.M .
3450
.12 or less
.25
.33
.50
.751
1.52357.5
1015202530
405060
75100
125150200250300
1750 1160 870 675 57 5
2.252.502.502.503.00
3.003.754.504.50
1.251.251.502.002.252.25
2.502.502.503.003.00
3.754.504.504.505.25
6.007.007.63
9.0010.00
11.00
1.501.502.002.502.502.50
2.502.503.003.003.75
4.504.505.256.006.75
6.758.389.00
10.0013.00
13.0013.00
3.003.00
3.003.003.003.754.50
4.505.256.006.756.75
8.259.0010.00
10.0013.00
15.0018.0022.00
3.003.00
3.003.003.754.504.50
5.256.006.758.259.00
10.0010.0011.00
13.0015.00
18.0020.0022.0022.0027.00
3.003.00
3.003.754.504.505.25
6.006.758.259.0010.00
10.0011.0012.00
14.0018.00
20.0022.0022.0022.0027.00
Sm a l l Shea ve D iam eters - Inche s
MinimumSheave Diameter
If the sheave driver is a standard electric motor, refer to Table 12 to
be sure that the sheave diameter selected will meet the Nationa
Electrical M anufacturers Association Standard for minimum sheav
diameters for electric motors. If the motor sheave is smaller than
the minimum diameter shown in this table, increase the sheave
diameter so that the motor sheave will conform with the charunless either an oversize or outboard bearing is installed.
Perform further inspection if possible. U se the Groove Dimension
table below (Table 13) to determine if excessive wear has occurred
or to select replacement belts and sprocket cross sections.
Table 12
d B
r b
r t
Sg S e
a
h g
Outside
Diam
eter
Pitch
Diam
eter
Diam
eter
Ove
rBalls
CrossSect ion
Minimum
R e c o m m e n d e dOutside
D i a m e t e rI n c h e s
0.50
AngleG roov e
0.50
D e g r e e s
Sg
rt
+0.005-0.000Inc he s
a
Inc he s
rb
I nc h e s In c he s
hg
Minimum
I n c h e s
dB
0.0004
Inc he s
Se
Inc he s
H
J
K
L
M
0.80
1.50
3.00
7.00
40
40
40
40
40
0.0630.001
0.0920.001
0.1400.002
0.1850.002
0.3700.002
0.005
0.008
0.010
0.015
0.030
0.020
0.030
0.038
0.058
0.116
0.013+0.0000.005
0.015+0.0000.005
0.020+0.0000.005
0.015+0.0000.005
0.030+0.0000.010
0.041
0.071
0.122
0.183
0.377
0.0469
0.0625
0.1093
0.1406
0.2812
0.080+0.0200.010
0.125+0.0300.015
0.125+0.0500.000
0.375+0.0750.030
0.500+0.1000.040
*Summation of the deviations from Sg for all gooves in any one sheave shall not exceed 0.010 inches.
Table 13 Groove Dimensions
WARNINGDisconnect power supply to the machine before removing
or installing sheaves or belts.
WARNINGDo not reinstall damaged or worn sheaves on equipment.
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21/44
Poly-V BeltINSTALLATIO N G U IDE
INSTALLATION
Before performing any installation, follow correct lockout procedures
to prevent any accidents.
IMPORTANT: Disconnect power supply to machine before doing
ANY work.
QD Bushing
If the sheaves are made with a Q D hub, follow these installation
and removal instructions.
HOW TOINSTALL A SHEAVE WITH A QD
HUB
Insert the bushing in the hub and line up bolt holes.
Insert the pull-up bolts and turn until finger tight.
Hold the loosely assembled unit so the bushing flange pointstoward the shaft bearings. R everse mounting the QD bushing can
be advantageous for some applications.
Slip the unit onto the shaft and align the hub in the desired position.
Tighten the setscrew in the flange only enough to hold the assembly
in position.
Tighten each pull-up bolt alternately and evenly.
Recheck alignment and completely tighten the setscrew on the shaft.
HOW TOREMOVE A SHEAVE WITH A QD HUB
P lace two of the pull-up bolts in the tapped holes in the sheave.
Turn the bolts alternately and evenly. They will push against the
bushing flange and act as jackscrews to break the grip between the
bushing and the hub.
Split Taper BushingI f the sheaves are made for spli t taper bushings, follow these
installation and removal instructions.
HOW TOINSTALL SPLIT TAPER BUSHING SHEAVES
P ut the bushing loosely in the sheave and start the capscrews
Place the assembly on the shaft. Align both edges of the sheave
with the edges of its mati ng sheave ( i. e. the sheave on the
driven shaft).
Tighten the capscrews according to the instructions furnished with
the bushings.
HOW TOREMOVE SPLIT TAPER BUSHING SHEAVES
Remove all capscrews.
Put two of the capscrews in the tapped holes in the flange of the
bushing.
Turn the bolts alternately and evenly until the sheave has loosened
Remove the sheave/flange assembly from the shaft.
4HRU(OLES
0ULL5P"OLTS
&LANGE
4APPED(OLES
3ETSCREW
+EY
3HAFT1$"53().'#ONVENTIONAL-OUNT
3HEAVE(UB
Thru Holes
Capscrews
Bushing
Flange
Sheave
TappedHoles
*QD is a registered Trademark of Em erson Power Transmission M anufacturing, L. P.
7/27/2019 Goodyear Belts
22/4422
Poly-V BeltIN STALLATIO N GU IDE
CHECK ALIGNMENT
Proper alignment is essential for long Poly-V belt life. Check bel
alignment whenever you maintain or replace belts or whenever you
remove or install sheaves.
The illustration above shows the correct way to check alignmen
between two sheaves with a straight edge. Check both front and
back alignment. Straight edge should touch sheaves at the fou
points indicated.
N on-parallel shafts or sheaves not aligned axi ally can cause
angular misalignment.
Laser Alignment Tool
G oodyears Laser A lignment Tool provides an alternative t
checking alignment with a straight edge. Each laser alignment too
comes with a rugged carrying case and detailed instructions to ge
you started with the quickest, easiest, and most versatile alignmen
tool on the market today.
Taper-Lock Bushing
HOW TOINSTALL A SHEAVE MADEWITH A TAPER-LOCK HUB
Look at the bushing and the hub. Each has a set of half-holes. T he
threaded holes in the hub are the mates to the non-threaded holes
in the bushing.
Insert the bushing in the hub and slide it onto the shaft. Align a
threaded hub hole with non-threaded bushing hole.
Start the setscrews into the holes that are threaded in the hub only.
Do not tighten the setscrews yet.
Align both edges of the sheave with the edges of its mating sheave.
Tighten the screws alternately and evenly. This procedure willwedge the bushing inward and cause it to contract evenly and grip
the shaft.
HOW TOREMOVE A SHEAVE MADEWITH A TAPER-LOCK HUB
Remove all the setscrews.
Place two of the setscrews in the holes that are threaded in the
bushing only.
Turn the setscrews alternately and evenly. T his movement will
unlock the grip and permit easy removal of the assembly with no
shock to the bearings or machinery.
4HREADED(UB(OLE5SEDTO)NSTALLSHEAVE
4HREADED"USHING(OLE5SEDTOREMOVESHEAVE
"USHING
3ETSCREWS
(UB
4APER,OCK4-2ELIANCE%LECTRIC#OMPANY
7/27/2019 Goodyear Belts
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Poly-V BeltINSTALLATIO N G U IDE
IDENTIFY CORRECT BELT
Always select belts to match sheave grooves.
SIZE DESIGNATION
BELT675 6L
6 48L
67.5 inchPitch Length
LSection
6Ribs
6Grooves
LSection
4.8Pulley Diameter
PULLEY
MATCHING BELTS
M atching multiple belts is not necessary for most Poly-V belt drives.
If you encounter a special application calling for matching, specify
matched belts on the order.
HOW TOINSTALL BELTS
After you correctly install and align the sheaves, you can install
the belts.
Always move the drive unit so you can easily slip the belts into
the grooves without force.
Never force belts into a sheave with a tool such as a screwdriver or
a wedge. Doing so may damage the ribs or break the cords.
2
Refer to table 14 to determine if enough clearance exists for be
installation and take-up.
For example, i f you are installing a 220J8, the minimum allowanc
below center distance is inch. If you are working to maintain
tension, the minimum allowance above center distance for bel
take-up is also inch.
M inim um A l low a nce BelowStandard Center Distance
for Installation of Belts, Inches
Up To and Incl. 20.0
Over 20.0 To a nd Inc l. 40.0
Over 40.0 To a nd Inc l. 60.0
Over 60.0 To a nd Inc l. 80.0
Over 80.0 To and Inc l. 100.0
M inum um A l low anceA bove S tandard
C enter D istance forMaintaining
Tension, inche sAll Cross Selections
Stand ard Effec tiveLe ng th , Inc he s J L M
0.4
0.5
0.6
0.6
0.7
Over 100.0 To and Inc l. 120.0
Over 120.0 To and Inc l. 160.0
Over 160.0 To and Inc l. 200.0
Over 200.0 To and Inc l. 240.0
Over 240.0 To and Inc l. 300.0
Over 300.0 To and Inc l. 360.0
Over 360.0 To and Inc l. 420.0
Over 420.0 To and Inc l. 480.0Over 480.0 To and Inc l. 540.0
Over 540.0 To and Inc l. 600.0
0.8
0.9
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.2
2.3
2.6
2.93.2
3.6
0.3
0.5
0.7
0.9
1.1
1.3
1.7
2.2
2.6
3.3
3.9
4.6
5.25.8
6.5
TENSION
Proper tension is essential for maximum belt life and efficiency
Improper belt tension is the primary cause of premature belt failure
and increased costs. U nder-tensioned belts lead to slippage
overheating, and noise, all of which lead to higher maintenance
costs and inefficient transmission of power. A lso, over tensioning
belts leads to premature wear, along with bearing, shaft, and pulle
problems. T he result is more frequent replacement of driv
components and costly downtime.
Table 14 POLY -V BELT RECOMMENDEDINSTALLATION AND TAKE-UP ALLOWANCES
3
Shorter Center Distanc e for Poly-V belt installation
Longer Center Distance for Poly-V belt Take-Up
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Poly-V BeltIN STALLATIO N GU IDE
Common Sense Rules of Poly-V Belt Tensioning
The ideal tension is the lowest tension at which the belt will not slip
under peak load conditions.
Check the belt tension frequently during the first 24-48 hours of
run-in operation.
Do not over tension belts. Doing so will shorten belt and bearing life.K eep belts free from foreign materials that may cause slippage.
Inspect the Poly-V drive periodically. Re-tension the belts if they are
slipping.
M aintain sheave alignment with a strong straight-edge tool while
tensioning Poly-V belts.
Tensioning Methods
Choose one of two tensioning methods for Poly-V belts:
TensionRite Belt Frequency Meter
The TensionR ite B elt Frequency M eter belt tensioning device
measures actual belt tension or frequency and works with all
industrial transmission belts including V-belts, synchronous belts,
and P oly-V belts.
Details about the TensionR ite Belt Frequency M eter can be found
on the web at www.goodyearindustrialproducts.com, or contact your
local Goodyear authorized distributor.
Deflection Principle
Plunger-type gauges utilize the deflection principle to check the
tension of a belt drive.
The gauge deflects the center of the belt span and the force of
this deflection is compared to a target deflection force for the
particular span. Then, one can adjust the belt tension until the actual
deflection force equals the target.
J
J
J
L
L
L
M
M
M
BeltCross Section
Small SheaveD iam eter Rang e
Force Flbs. pe r rib
1.32 1.67
1.77 2.20
2.36 2.95
2.95 3.74
3.94 4.92
5.20 6.69
7.09 8.82
9.29 11.81
12.40 15.75
0.4
0.5
0.6
1.7
2.1
2.5
6.4
7.7
8.8
Run the drive briefly to properly seat the belt. A t least one sheav
should rotate freely during the tensioning procedure.
M easure the span length. (See illustration)
M ark the center of span. At the center point, use a tension teste
and apply a force perpendicular to the span large enough to deflec
the belt 1/64" for every inch of span length. ( Ex: a 100" span
requires a deflection of 100/64" or 1 9/16")
Compare the actual deflection force with the values in Table 15
A force below the target value indicates under-tension. A forc
above the target indicates over-tension.
The following few sections detail other issues that could aris
during a Poly-V belt drive installation.
BELT GUARDS
Poly-V belt drive guards ensure cleanliness and safety. Screened
meshed, or grilled guards are preferable because they allow for ai
circulation and heat escape.
Table 15 - BELT DEFLECTION FORCE
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Poly-V BeltINSTALLATIO N G U IDE
IDLERS
Even though Poly-V belts are designed to handle idlers better than
most other power transmission belts, idlers will reduce belt life and
should be avoided. Idlers put an additional bending stress point on
the belts, which reduces the belts horsepower rating and its life.
The smaller the idler, the greater this stress and the shorter the
belts life. I f the drive design requires an idler, observe the followingdesign recommendations.
Inside IdlerA V-grooved idler located on the inside of the belts on the slack
side of the drive is preferable to a back side idler. Locate the idler
near the large sheave to avoid reduction of the arc of contact with
the small sheave. Note that the size of the V-idler pulley should
be equal to or larger (preferably) than the diameter of the small
sheave.
Back Side Idler
A back side idler increases the arc of contact on both sheaves.
However, such an idler also forces a backward bend in the P oly-V
belt, which contributes to unwanted wear such as rib cracking and
premature failure. If a back side idler is the only option, follow two
guidelines: ( 1) mak e sure the diameter of the flat idler pulley is at
least 1.5 times the diameter of the small sheave and ( 2) locate the
back side idler as close as possible to the small sheave.
Kiss Idler
U nlik e the back side idler, the k iss idler does not penetrate the bel
span and create a back bend. Consequently, the kiss idler does no
contribute to premature failure. The kiss idler can help control bel
vibration and whip on drives subject to shock and pulsating loads
When using a kiss idler, mak e sure the diameter of the flat pulley is
at least 1.5 times the diameter of the small sheave.
7/27/2019 Goodyear Belts
26/4426
Variable SpeedIN STALLATIO N GU IDE
INSPECT SHEAVES
The following sections outline installation procedures that will
ensure maximum life and performance for your Goodyear Variable
Speed belts.
Check sheaves for cleanliness, damage, and wear whether you
are replacing an existing belt, performing routine maintenance, or
installing a new drive.
Worn sidewalls also interfere with the shifting action. N icks or
gouges can cut the belt. Dirt on the belt and in the grooves can
abrade the belt and oil can attack the belt materials. Use a stiff
brush to clean off rust and dirt. Wipe off any oil and grease. Worn
moving parts cause vibration and reduce belt life.
.
CHECK ALIGNMENT
Proper alignment is more critical for Variable Speed Drive sheaves
than for conventional V-belt drives. Check belt alignment wheneve
you maintain or replace belts or whenever you remove or instal
sheaves.
T his illustration ( Fi g A) , shows the correct way to check
alignment between two variable speed sheaves.A nother illustration ( Fi g B) , shows a belt mi saligned. To
correct the alignment, move one sheave so that the straight edge is
equidistant from both sides of the narrow sheave. The belt edges
should also be equidistant from the straight edge.
RIGHT - The belt is parallelto the straight edge
Fig B
IDENTIFY CORRECT BELT
To select the correct belt, refer to the drive manufacturers
recommendations. T he belt length is most critical on fixed cente
drives with both pulleys variable since accurate length is required
to achieve precise drive speed variations. Belt length with one
variable and one fixed pulley is also critical as it affects the
allowable increase and decrease in center distances.
Types of Variable Speed Drives
Both Sheaves Variable
Variable to Fixed Sheave
WARNINGDisconnect power supply to the machine before removing
or installing sheaves or belts.
WARNINGDo not reinstall damaged or worn sheaves on equipment.
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27/44
Variable SpeedINSTALLATIO N G UI DE
HOW TOINSTALL BELTS
Take special care during the installation of variable speed belts to
avoid damage to the belts and sheaves. You may have to open
variator sheaves fully to facilitate installation. You may also have to
shorten the drive center distance to allow for easy installation. You
may have to remove sheaves, as well. A fter assembly, return the
drive center distance to normal and recheck drive alignment.
TENSION
Spring loaded sheaves, which apply the tension required to handle
the design load, govern variable speed belt tensioning.
BELT GUARDS
Belt guards ensure cleanliness and safety. Screened, meshed, or
grilled guards are preferable because they allow for air circulation
and heat escape. Note: R efer to www.osha.org.
IDLERS
Idlers are not recommended for variable speed drives.
7/27/2019 Goodyear Belts
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Synchronous BeltsIN STALLATIO N G U IDE
28
INSPECT SPROCKETS
The following sections outline installation procedures that
will ensure maximum life and performance for your
Goodyear synchronous belts such as H awk Pd, Falcon Pd,
and Eagle Pd belts.
Worn teeth will cause belt wear and/or damage. N icks or gouges
can cut the belt. Dirt on the teeth and in the grooves can abrade the
belt and oil can attack belt materials.
Use a stiff brush to remove rust and dirt. U se a soft cloth to wipe
off oil and grease.
M ake sure the components are ready for installation. C lean all
shafts, removing any nicks or burrs. Clean all mating surfaces of the
sprocket, bushing, and shaft. Do not use lubrication or anti-seize
solution on any of these surfaces.
M ake sure the shafts are true and parallel by accurately measuring
the distance between the shafts at three points along the shaft.
The distance between the shafts should be the same at all three
points as shown.
Also, make sure the shafts are rigidly mounted. Shafts should not
deflect when the belt is tensioned.
CHECK1
C HEC K2
C HEC K3
SHAFT 1
SHAFT 2
INSTALL HARDWARE
Correct sprocket selection and installation is important. Before
performing any installation, follow correct lockout procedures to
prevent any accidents.
IMPORTANT: Disconnect power supply to machine before doing
AN Y work.
QD Bushing
I f the sheaves are made with a Q D hub, follow these installation
and removal instructions.
HOW TOINSTALL A SPROCKET WITH A QD HUB
For conventional mounting, insert bushing into the sprocket
aligning the tapped holes in the bushing flange with the thru holes
in the sprocket hub.
Insert capscrews through the thru holes and into the tapped
holes.
Insert the key into the keyseat of the shaft.
With capscrews to the outside, place the sprocket and bushing
assembly on the shaft, positioning the assembly with the bushing
flange towards the shaft bearings. Reverse mounting the QD
bushing can be advantageous for some applications.
M ount the other sprocket in a similar manner.
Check that the teeth of both sprockets are pointing in the same
direction when installing Eagle Pd sprockets.
Snug the capscrews so that the sprocket /bushing assembly canstill move on the shaft.
Align the sprockets using a straight edge. Check for contact in fou
places as shown. Do not use bearings or drive shafts as reference
points for sprocket alignment.
4HRU(OLES
0ULL5P"OLTS
&LANGE
4APPED(OLES
3ETSCREW
+EY
3HAFT1$"53().'#ONVENTIONAL-OUNT
3PROCKET(UB
*QD is a registered Trademark of Emerson P ower Transmission M anufacturing, L. P.
WARNINGDisconnect power supply to the machine before removingor installing sheaves or belts.
WARNINGDo not reinstall damaged or worn sheaves on equipment.
7/27/2019 Goodyear Belts
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Synchronous BeltsINSTALLATIO N GU IDE
U sing a torque wrench, tighten the capscrews to the torque values
listed below. If there is not a gap of 1/8" to 1/4" between the
bushing flange and the sprocket hub then disassemble the parts
and determine the reason for the faulty assembly.
The sprocket will draw onto the bushing during tightening. Always
recheck alignment after tightening the capscrews. If alignment has
changed, loosen the capscrews and move sprocket/bushing
assembly on shaft to re-align. Tighten the setscrews over the
keyway to the torque values listed in the table.
If the sprockets are straight bore, use the above alignment procedure
and then tighten the setscrews to the correct torque for thesetscrew size as listed in the Torque Specifications table below
(Table 16).
Bushing
CapscrewTorque
SetscrewTorque
SetscrewSize
(in-lb) (ft-lb) (in-lb) (in)
H
SH
SDS
SK
SF
E
F
J
M
N
108
108
108
180
360
720
900
1620
2700
3600
9
9
9
15
30
60
75
135
225
300
87
87
87
165
290
290
290
290
620
1/4
1/4
1/4
5/16
3/8
3/8
3/8
3/8
1/2
QD bushings can be installed with the capscrews on either side,
excluding H , M , and N sizes. Drives with opposing shafts require
one of the sprockets be mounted with the capscrews on the flange
side and one with the capscrews on the hub side.
Split Taper Bushing
I f the sprockets are made for split taper bushings, follow these
installation and removal instructions.
HOW TOINSTALL SPLIT TAPER BUSHING SPROCKETS
Put the bushing loosely in the sprocket and start the capscrews
Place the assembly on the shaft. Align both edges of the sprocke
with the edges of its mating sprocket ( i. e. the sprocket on the
driven shaft).
Tighten the capscrews according to the instructions furnished with
the bushings.
HOW TOREMOVE SPLIT TAPER BUSHING SPROCKETS
Remove all capscrews.
Put two of the capscrews in the tapped holes in the flange of the
bushing.
Turn the bolts alternately and evenly until the sprocket has loosened
Remove the sprocket/bushing assembly from the shaft.
#/.4!#40/).43
HOW TOREMOVE A SPROCKET WITH A QD HUB
Place two of the pull-up bolts in the tapped holes in the sprocket.
Turn the bolts alternately and evenly. They will push against the
bushing flange and act as jackscrews to break the grip between the
bushing and the hub.
Table 16 - TORQUE SPECIFICATIONS
Thru Holes
Capscrews
Bushing
Flange
Sheave
TappedHoles
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Synchronous BeltsIN STALLATIO N G U IDE
30
Taper-Lock Bushing
The following instructions illustrate how to install a sprocket made
with a Taper-Lock hub.
HOW TOINSTALL A SPROCKET MADEWITH A TAPER-LOCK HUB
Look at the bushing and the hub. Each has a set of half-holes. T he
threaded holes in the hub are the mates to the non-threaded holes
in the bushing.
Insert the bushing in the hub and slide it onto the shaft. Align a
threaded hub hole with non-threaded bushing hole.
Start the setscrews into the holes that are threaded in the hub only.
Do not tighten the setscrews yet.
Align both edges of the sprocket with the edges of its mating
sprocket.
Tighten the screws alternately and evenly. T his procedure will
wedge the bushing inward and cause it to contract evenly and grip
the shaft.
HOW TOREMOVE A SPROCKET MADEWITH A TAPER-LOCK HUB
Remove all the setscrews.
Place two of the setscrews in the holes that are threaded in the
bushing only.
Turn the setscrews alternately and evenly. T his movement will
unlock the grip and permit easy removal of the assembly with no
shock to the bearings or machinery.
CHECK ALIGNMENT
Drive Alignment
Synchronous belts are very sensitive to misalignment. The tension
carrying member has a high tensile strength and resistance to
elongation, resulting in a very stable belt product. Any misalignmen
will lead to inconsistent belt wear, uneven load distribution and
premature tensile failure. In general, synchronous drives should
not be used where misalignment is a problem. Limit misalignmen
to 1/3 degree or 1/16" per foot of center distance. With paralle
shafts, misalignment occurs when there is an offset between the
sprocket faces as in Fig A. M isalignment also occurs when the
shafts are not pararllel as in Fig B.
IDENTIFY CORRECT BELT
Always select belts to match sprocket profile. Eagle Pd belts
and sprockets from G oodyear are identified with a unique Colo
Spectrum System. The seven colors used for identification are
Yellow, White, Purple, Blue, Green, O range, and Red. Each colo
represents a different size so that Blue belts are made to operate
with Blue sprockets. M ake sure to obtain the same color belt and
sprockets. When installing other Goodyear synchronous belts, use
the correct sprocket width.
Laser Alignment Tool
Goodyears Laser Alignment Tool provides an alternative to
checking alignment with a straight edge. Each laser alignment too
comes with a rugged carrying case and detailed instructions to ge
you started with the quickest, easiest, and most versatile alignment
tool on the market today.
Figure A
Figure B
1
4HREADED(UB(OLE5SEDTO)NSTALLSHEAVE
4HREADED"USHING(OLE5SEDTOREMOVESHEAVE
"USHING
3ETSCREWS
(UB
4APER,OCK4-2ELIANCE%LECTRIC#OMPANY
7/27/2019 Goodyear Belts
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Synchronous BeltsINSTALLATIO N GU IDE
MATCHING BELTS
Drives using synchronous belts are not recommended to run in
matched sets. I f a special application requires matching, specify
matched belts on the order. N ote: such requests require
additional order lead time. Also, matching code numbers will not
appear on the belts.
HOW TOINSTALL BELTS
Before installation, inspect the belt for damage. B elts should never
appear crimped or bent to a diameter less than the minimum
recommended sprocket diameter.
Always move the drive unit so you can easily slip the belts into
the grooves without force.
Shorten the center distance or release the tensioning idler to
install the belt. Do not pry the belt on the sprocket. R efer to the
following Center D istance Allowance tables for the required center
distance adjustment.
P lace the belt on each sprocket and ensure proper engagement
between the sprocket and belt teeth.
Lengthen the center distance or adjust the tensioning idler to
remove any belt slack.
Shorter Center Distance for Synchronous belt installation
Longer Center Distance for Synchronous belt Take-Up
I f you install a belt over one flanged sprocket and one unflanged
sprocket with the sprockets already installed on the drive, allow the
following decrease in center distance for installation and increase
in center distance for tensioning.
Apply the following center distance allowances for Hawk P d and
Falcon P d. A center distance adjustment, or decrease in
center distance, is necessary to install a belt. In addition, an
increase in center distance will be necessary for proper tensioning
If you install a belt together with sprockets, allow the following
decrease in center distance for installation and an increase in
center distance for tensioning.
PitchLengthRange(mm)
Allowance (Decrease)For Installation8M, 14M Belts
(mm/in)
Allowance (Increase)For Take-Up
8M, 14M Belts(mm/in)
Less than 1525
1525-3050
Greater than 3050
2.5/0.1
5.0/0.2
7.5/0.3
2.5/0.1
5.0/0.2
7.5/0.3
I f you install the belt over two flanged sprockets that are
already installed on the drive, allow the following decrease in
center distance for installation and increase in center distance for
tensioning.
PitchLengthRange(mm)
Allowance (Decrease)For Installation
Allowance (Increase)For Take-Up
8M, 14M Belts(mm/in)
Less than 1525
1525-3050
Greater than 3050
22.5/0.9
25.0/1.0
27.5/1.1
2.5/0.1
5.0/0.2
7.5/0.3
8MBelts
14MBelts
(mm/in)
36.5/1.4
39.0/1.5
41.5/1.6
Consider the following center distance allowances when installing
Eagle Pd sprockets.
Since flanges are not necessary on Eagle Pd drives, only one
table of center distance allowances is provided.
PitchLengthRange(mm)
Allowance (Decrease)For Installation
Allowance (Increase)For Take-Up
8M, 14M Belts(mm/in)
Less than 1525
1525-3050
Greater than 3050
34.5/1.4
37.0/1.5
39.5/1.6
2.5/0.1
5.0/0.2
7.5/0.3
8MBelts
14MBelts
(mm/in)
59.2/2.3
62.0/2.4
64.5/2.5
PitchLengthRange(mm)
Allowance (Decrease)For Installation Allowance (Increase)
For Take-Up8M, 14M Belts
(mm/in)
Less than 1525
Greater than 1525
10.1/0.4
15.2/0.6
2.5/0.1
5.0/0.2
Yellow, White,Purple Belts
(mm/in)
15.2/0.6
17.8/0.7
Blue, Green,Orange,
Red Belts
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Synchronous BeltsIN STALLATIO N G U IDE
32
TENSION
Install and tension Goodyear synchronous belts properly to ensure
optimum performance.
Proper tension is essential for maximum belt life and efficiency.
Improper belt tension is the primary cause of premature belt failure
and increased costs. U nder-tensioned belts lead to ratcheting and
excessive tooth loading, both of which lead to higher maintenancecosts and inefficient transmission of power. Also, over tensioning
belts leads to premature wear, along with bearing, shaft, and
sprocket problems. The result is more frequent replacement of
drive components and costly downtime.
Tensioning Methods
Choose one of two tensioning methods:
TensionRite Belt Frequency Meter
The TensionR ite B elt Frequency M eter belt tensioning device mea-
sures actual belt tension and works with all industrial transmission
belts including V-belts, synchronous belts, and Poly-V belts.
Details about the TensionR ite B elt Frequency M eter can befound on the web at www.goodyeari ndustrialproducts.com. O r
contact your local Goodyear authorized distributor.
Deflection Principle
Plunger-type gauges utilize the deflection principle to check the
tension of a belt drive.
First, determine the proper deflection force to tension the belt
Deflection forces are listed in Table 17. Deflection forces are also
given on the output of the M aximizer computer drive analysis.
D, Diameter (in)
D, Diameter (in)Q, Deflection (in)F, Force (lbs)
P, Span Length
C, C enter Distance (in)
BeltType
0-100 RPM
New Belt Used Belt
Yellow
White
Purple
Blue
Green
Orange
Red
8GTR 12
8GTR 21
8GTR 36
8GTR 62
14GTR 20
14GTR 37
14GTR 68
14GTR 90
14GTR 125
8M 20
8M 30
8M 50
8M 85
14 M 40
14 M 55
14 M 85
14 M 115
14 M 170
101-1000 RPM
New Belt Used Belt
1000-up RPM
New Belt Used Belt
15
30
60
54
80
107
161
24
42
72
124
38
70
129
171
238
15
23
39
69
47
70
116
162
249
11
21
43
38
57
76
115
17
30
51
88
29
54
99
131
181
11
17
29
50
34
51
84
118
181
12
24
47
44
66
88
131
14
25
42
72
31
57
105
140
194
13
20
35
61
38
56
93
130
201
8
17
34
31
47
63
94
10
18
30
52
23
43
78
104
144
10
15
26
45
28
41
68
95
146
9
19
38
38
57
76
115
7
12
21
36
28
52
95
126
175
12
19
32
56
32
48
79
110
171
7
13
27
27
41
55
82
5
9
15
26
21
39
71
95
131
9
14
24
41
24
35
58
80
125
EAGLEPd
FALCON
Pd
HAWKPd
TABLE 17 - DEFLECTION FORCES FORBELT TENSIONING (LBS)
where: P = span length, inches
C= Center distance, inches
D = Large pulley pitch diameter, inches
d = Small pulley pitch diameter, inches
The gauge deflects the center of the belt span and the force of this
deflection is compared to a target deflection force for the particular
span. Then, one can adjust the belt tension unti l the actual deflection
force equals the target.
7/27/2019 Goodyear Belts
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Synchronous BeltsINSTALLATIO N GU IDE
I f using a tension gauge, the deflection scale is calibrated in inches
of span length. Check the force required to deflect the belt the
proper amount. There is an O-ring to help record the force. I f the
measured force is less than the required deflection force, lengthen
the center distance. If the measured force is greater than the
required deflection force, shorten the center distance.
If using other means to apply force to the belt, adjust the center
distance so that the belt is deflected 1/64" per inch of span length
when the proper force is applied.After the belt is properly tensioned,
lock down the center distance adjustments and recheck the
sprocket alignment. If possible, run the drive for approximately 5
minutes with or without load. Stop the drive and lock out the power
source and examine alignment, capscrew torque and belt tension
of the drive. A djust the center distance to increase the belt tension
to the N ew Value in the Deflection Force Tables. Lock down the
drive adjustments and recheck tension. R echeck the belt tension,
alignment, and capscrew torque after eight hours of operation to
ensure the drive has not shifted.
The following few sections detail other issues that could arise during
Synchronous belt installation.
USING A FIXED CENTER DISTANCE
A fixed center distance drive has no adjustment for tensioning or
installing the belt. D ue to the tolerances of drive components,
including sprocket, belt, and drive geometry, a drive with a Fixed
Center Distance is not recommended as adequate belt tension
cannot be assured. P roper belt installation requires a minimum
center to center adjustment. Refer to belt installation for center to
center adjustment. In some cases, fixed center drives cannot beavoided and should be used only with the understanding that belt
life will be reduced.
DESIGN FACTORS
To ensure proper belt selection, consult the appropriate design
manual for Eagle P d, Falcon P d, or Hawk Pd. Due to the
high load capacity of these belts, mak e sure that all of the drive
components are adequately designed. Consult sprocket and other
component manufacturers for design assistance or if verification of
application is needed.
BELT GUARDS
Belt guards ensure cleanliness and safety. Screened, meshed, orgrilled guards are preferable because they allow for air circulation
and heat escape.
5
IDLERS
U se idlers either inside or outside of the belt, preferably outside
Idlers often fu