730N Series - Stahlwilleu-MIL Manual-09.pdf · 730N Series Torque Wrench Factory Calibrated Center Point Insert Size 730N/2, 730N/5, 730N/10, 730Na/ 2, 730Na/5, 730Na/10 17.5mm 9

730N Series

Torque Wrench

Procedures Manual

730N Series

Operational

Principles and

Guidelines

Beam at rest on Cam.

Ramp. The ramp is what is adjusted to

calibrate the wrench. No disassembly required to cal a

wrench.

“Tip Block” as the cam

moves up the ramp the block angle is increased making it more difficult for the small

triangle to “click” past.Interface. Where the

“click” occurs.

Lever. This is how the insert heads connect to the

torque mechanism. In this mode the lever contacts the mechanism to pull torque. If the wrench is used as a “Breaker bar” the Lever falls off the mechanism and against the torque wrench housing. Voila! No damage!

Evolution of a proven design.

The 730N series evolves from the proven 730 series wrenches. 730 wrenches built their reputation for accuracy and durability in the harshest industrial conditions on oil platforms, remote wind turbine facilities, MRO operations, OEM’s and deployed military units.

Accurate Setting with “Quick Select.”

New to the 730N “Quick Select” allows for very accurate setting of torque values. This is done quickly and easily with or without gloves in virtually any lighting conditions. Even adjust one handed!

Easy to Read Scale.

The easy to read dual scale (in.lb & ft.lb or Nm & ft.lb) allows technicians unprecedented accuracy. Set accurately to 2 in.lb. increments. Simply pull out the dial and rotate to the desired value then press dial in to lock.

Durable & Cost E!ective.

The 730N does not use a spring

in the mechanism. (see diagram ).

Proven advantages:

• No need to Zero the wrench after use. (Nothing under compression.)

• Full use of scale is possible. No loss of top or bottom %.

• Limited Lifetime warranty on non-synthetic components.

• North American 3 year

accuracy warranty.

• Same accuracy clockwise and counterclockwise. +/-3%.

• Sealed against dust & dirt.

• Interchangeable insert

heads. Maximum flexibility out of one torque wrench. Simply insert the head necessary for the task. Fewer wrenches are needed.

• No need to disassemble to adjust or calibrate. 2mm hex key is all that is needed.

• Traceable to national standards. DIN, NIST, ISO

Superior Longevity and Cost E!ective Design.

Stahlwille 730N series torque tools

set the standard for accuracy and

long life.

Because of the unique proven design,

key components manufactured in

house and uncompromising quality it

is not uncommon for Stahlwille

mechanical torque wrenches to see

over 400,000 activations before

replacement.

That is a 20 year service life at

maximum activations (5,000) each

year. DIN EN ISO6789 compliant.

730Na Model in.lb. range ft.lb. range

730 Na/2 20 - 180 1.5 - 15

730 Na/5 90 - 450 7 - 37

730 Na/10 180 - 900 15 - 75

730 Na/20 350 - 1800 30 - 150

730 Na/40 800 - 3600 60 - 300

730N Model Nm range ft.lb. range

730 N/2 2 - 20 Nm 20 - 180 in.lb.

730 N/5 10 - 50 Nm 7 - 37

730 N/10 20 - 100 Nm 15 - 75

730 N/12 25 - 130 Nm 20 - 95

730 N/20 40-200 Nm 30 - 150

730 N/40 80 - 400 Nm 60 - 300

730 N/65 130 - 650 Nm 100 - 480All 730N series torque wrenches

SHARE THE SAME COMPONENTS. Scale ranges vary.

Serial NumberSince 1992 every Stahlwille Torque Wrench has left the factory with a unique 9 digit

serial number. The serial number is not random but indicates where and when the

wrench was manufactured and tested.

The following example illustrates how to interpret a Stahlwille generated serial

number. We’ll use the wrench number above to illustrate.

Example: 607015002

607015002 The first digit refers to the factory calibration station.

607015002 The second and third digit position reveal the year of

! ! ! manufacture. (2007)

607015002 The 4th thru 6th digit position reveal the date of

! ! ! manufacture. (15th day of 2007 or January 15, 2007)

607015002 The 7th thru 9th digits reveal the daily production

! ! ! number of the wrench. (2nd wrench produced 01.15. 2007)

Switching Group/Machined Beam & ISO info.

Switching Group

Stahlwille Tools North America provides a 3 year accuracy warranty on the switching group. In addition there are special warranty considerations for military customers and OEM’s who meet certain requirements. Please talk to your representative or call Stahlwille Tools North America for more information.

The accuracy warranty states that Stahlwille Tools North America guarantees that at each calibration period, not to exceed 1 year and at the customers expense, the 730N series wrenches will calibrate back to the factory

specification of +/-3%. If the wrench cannot be adjusted to +/-3% Stahlwille Tools North America will replace the switching group with a new version which will then carry 3 years of warranty forward.

Machined Beam

Stahlwille introduced a new machined beam in 2007 designed to offer even greater accuracy and repeatability. These beams are identified by a black coating. The new beam reduces friction, enhances corrosion resistance and provides calibration accuracy of +/-1% achievable by the customer Metrology lab or calibration provider.

ISO 6789

All procedures outlined in this manual are based upon but do not override the procedures and specifications found in the current ISO 6789 and related international and national guidelines. (DKD or NIST)

As the ISO 6789 is a copyrighted publication it cannot be copied or distributed without permission. It can be purchased in electronic format at:

http://www.2din.de/index.php?lang=eng and enter ISO 6789 in the search window.

Switching or “Vector” Group

Machined Beam. The “Spring”

http://www.2din.de/index.php?lang=eng




730N Series

Calibration

ATTENTIONStahlwille makes a very popular Quick Release ratcheting insert.

If your customer ordered these inserts please note: These inserts will not calibrate correctly (Exception is the 1/4” QR) as a

factor must be applied to compensate for the added length of the insert. All Stahlwille Torque Wrenches are calibrated at the factory to the

standard insert center point.

730N Series Torque Wrench Factory Calibrated

Center Point

Insert Size

730N/2, 730N/5, 730N/10, 730Na/2, 730Na/5, 730Na/10

17.5mm 9 x 12

730N/12, 730N/20, 730N/40, 730N/65, 730Na/20, 730Na/40

25mm 14 x 18

Complete details on all inserts and center point data is available in the

Stahlwille Programme catalog or Aerospace catalog in Section 5..

Center Point Information

Regarding Inserts & Calibration

25mm17.5mm

Note! This is how to achieve the correct tightening torque -even if you are using inserts with an extension

When you tighten fasteners using inserts whose extension length S deviates from the standard length SF' it is necessary to recalculate the setting/display value for the torque wrench in use. Caution! If adapters are combined with inserts or special tools, use the sum of the extensions =J;S. Where the special tool is angled to the side, WK will have to be determined empirically.

Normal situation

WK = MAxLF

Lk

[NmxmmJ

mm

Torque wrench No 730N/1O combined with

square drive insert tool No 734/5 and socket size 13 mm. Required tightening torque for the screw MA = 40 N m

MAxLF Dimension table for torque wrenches: LF = 336 mm, SF = 175 mm Dimension table for square drive insert tools: S = 175 mm

WK = LF-SF+S (or LSj

MA = desired tightening torque S extension of STAHLWILLE ,dh inserts or special tools W = reading/setting W= MA (see dimension table

WK = adjusted reading for inserts) SF

or setting value WK" MA SF = standard extension (see dimension table for LF = functional length torque wrenches) (see dimension table No adjustment to sening value required on torque wrench.

for torque wrenches) IS = total of all extensions of the attached inserts

= adjusted functional length Sadapl", + Sinsen + .,

LK = LF - SF +S(or 1:S) Example 2: adjusted reading (Insert tool and adapter)

Torque wrench No 71/2 combined with

square drive insert tool No 734/5 and adapter No 447 size 10 mm Required tightening torque for the screw MA = 25 N mExample 1: adjusted setting value (1 insert tool)

Torque wrench No 730N/20 combined with Dimension table for torque wrenches: LF = 250 mm, SF = 175 mm

ring insert tool No 732/40 size 36 mm Dimension table for square drive insert tools: S = 175 mm

Required tightening torque for the screw MA = 190 N m Dimension table for adapters: S = 50.8 mm

Dimension table for torque wrenches: LF = 424.5 mm, SF = 25 mm Dimension table for ring insert tools: S=28mm LF

LF

M. S

MAX LF 190 N m x 424.5 mm 190 N m x 424.5 mm MAxLF 25Nmx250mm 25Nmx250mm WK = = ------- wK = = ---------

LF -5F +5 424.5mm-25mm +28 mm 427.5mm LF -5F +1:5 250mm-17.5mm+17.5mm+50.8mm 300.8mm

Adjusted sening value WK = 188.7 N m value to set = 189 N m Adjusted reading WK = 20.8 Nm

... and this is what it looks like in the catalogue.

h L LF s" Fine scale $/ b

mm mmmmmmmmmm•. n "Wl 23 275 228

9x 12 28 225 "1ninJb 02Nm 23 280.5 25 ,339x 12 28025Nm 336I Tun 386 5822.

4013 40 \3 :1.3 " 25.

nt:;;Nm 9x 12 28 23 \35421 379 5822. 14 24 " 14 x 18 28 23

O.5Nm 4014 \342.5 tUb 4245 5822. 25,5 \2 25

46714x 18 28 23 4015 25 ,38

StUb t Nm 23 flJ7 5822. ,214x 18 28 4016 \AA

IUll_IO 2Nm 30.6 25.6 890 5822. 17 '3 25

__ 'L 'll:;. ..... m 14 x '8 4017 5 25 ,.5

275 2 inJb \539x 12 28 23 5822. 4016 30 '3 25

O.5tt.lb 3,30 17.5 5822. 33'59x 12 28 23 4019 25 ,62

1 tt.lb 2.5 in.lb 28 23· 386,..336 17.5 5822. ' 21 34 5 ,5 25

&""JllJb 5in.lb 9x 12 23 <167 424.5 25 5822.40222. 22. 37' 5 ,5 25

\75 ...... ,... tn inlb 14x 18 28

pi:J7 564.5 25 40 \B214 x 18 28 2523 5822. 4i,5 ,7

4024 ,B'5822. 26 45.5 ,9 4027 25 2\0

!lOSll040

/// 28: 203

5822. 47.5 '9 2B·Required tightefling lORlue fat" the screw MA '1190 N m 5822.4030 3A 52 '-' 240

40325822. 403A 3& 54 19

Required setting value WK se22. 3&'" - 20 40 nell

5822.404 ' AI 60 • 1110,11",,0 'ol\il1QS "" ""e

(1,,\"1 \0 nole oooage ,92\ ------ ,9 30"

ExtJmp.le 1 (see

W _ 18

B:1Nm Torque wrench 730N/20, combined wilh insert tool 732/40, size 36 mm. IC ReqUired lightening torque for the screw M. = 190 N m

Adjusted sef1ing value on lORlue wrench No 730N/20: 189 N m Dimension table for torque wrenches: LF = 424.5mm; SF = 25mm

Dimension table for ;nser1 toofs: S = 28 mm196

OJ II

121 ,23 ,ZB

5

25 25

h'i c9

\1

MAX LF

WK = LF-SF + S

Torque Wrench Calibration & Procedures

Stahlwille Manoskop 730N & Na series.

All calibration procedures whether detailed in this document or elsewhere are to be

performed in accordance with the current DIN ISO 6789 standard.

A calibration device with a certified accuracy of +/-1% of all values to be measured is

required to complete adjustment / calibration or re-calibration tasks.

When the wrench is being loaded for test the following procedures are to be followed:

! Load must be applied to the middle of the handle at the point of the mark on

the handle. (Whether in a fixture or by hand). The embossed arrow and or other

markings are not intended for use as reference points.

! Apply load evenly and ensure that the load from approx. 80% of the target

torque value is applied uniformly and results in a trigger within a timeframe

from .5 to 4 seconds.

Step 1: Load and work in

! Load the wrench until it triggers at 100% value (the highest setting on

scale), release load and back off the wrench several degrees to allow a

reset.

! Repeat this a total of 5 times. This will “work in” the switching elements

in preparation for calibration.

Step 2: Check 20%

! Set the wrench to 20% of the scales value (ie. If maximum value of the

scale is 100Nm then 20% would be 20 Nm) .

! Check and record the value at which the wrench triggered. Please ensure

that the value recorded is the “first peak” which is not necessarily the

highest value obtained.

Step 3: Check 100%






Step 4: Check accuracy to determine whether to calibrate or adjust

! If the accuracy of the wrench at 20% and 100% is not within the required

tolerance (from +4.14 to -3.85%) adjustment may be required. Proceed

to steps 9 through 11 for adjustment instructions.

Step 5: Calibrate 20%






! Repeat a total of 5 times, recording each value.















Step 8: Check Accuracy

! Check the values obtained in steps 5 to 7 for acceptable accuracy.

! If the values are within the required tolerances the appropriate

documentation should be produced.

! If the values are not inside of an acceptable tolerance proceed to steps 9

through 11 for adjustment procedures.

Step 9: Adjustment 20%

! Adjust the lower range FIRST

! Adjusting the lowest adjustment screw (closest hole to end of handle)

using a 2mm hex key. Clockwise adjustment will increase the trigger

setting, counter clockwise adjustment will lower the trigger setting.

Step 10: Adjust 100%

! Check and if required adjust the 100% setting.

! Adjust the upper range by adjusting the upper adjustment screw (the

second adjustment screw further up the wrench) using a 2mm hex key.

Clockwise adjustment will increase the trigger setting, counter

clockwise adjustment will lower the trigger setting.

! No adjustments are necessary for the 60% range. Should accuracy

deviations be present in this range they must be compensated for

altering the lower and upper ranges to bring the complete range inside of

the allowable accuracy tolerances.

Adjustment Ports. Remove White plugs to gain access. Use 2mm hex key.

Step 11: Verify for correct adjustment

! Check 20%,60%,100% for accuracy conformance by loading several

times at each value prior to calibration. This step reduces the likelihood of

having to interrupt a calibration for readjustment of the wrench.

! Please bear in mind that adjustments to either lower or upper setting will

have an effect all settings, therefore for any single adjustment 20%,60%

and 100% should be checked before starting to perform a calibration

check.

! Once verified proceed to Steps 5 through 8 for calibration instructions.

NOTE:

If after repeated attempts to adjust the wrench fail to bring the unit to an acceptable

level of accuracy factory service may be required. Please return the units in question

to Stahlwille factory authorised service centre for repair.

730N Series

Disassembly &

Reassembly

730N & Na Disassembly / Reassembly

Note:

The following is a summation of factory approved service procedures. These

procedures are issued as guidance and may be revoked or altered at any time without

prior consent. All applicable local or corporate heath and safety guidelines must be

observed and and not contained in this document.

Please note after any entry has been made to the wrench a Calibration in accordance

with ISO 6789 is mandatory.

Required Tools Possible Parts Required Consumable Materials

#7 Torx bit

#9 Torx bit

4mm drift or punch

Hammer

Bit Driver

Pocket knife

Engineer pick

1- Main scale window - 925055552

1- Micro scale window - 925055553

1- Handle part 1 - 925055543

1- Handle part 2 - 925055544

2 - Sealing Plugs - 925051549

For other parts or components please

see the attached parts lists in the

appendix.

Grease MOS2 (Molydag 49) or

equivalent.

Grease Microlube GL261 or

equivalent anti-corrosion fretting

grease.

Locktite 496

Ethyl Alcohol (for spot cleaning)

Clean lint free rags

Step 1:

Remove Torx

Screws in handle

using #7 Torx bit.

The two component

handle is Skydrol,

MEK and fuels

resistant. New

handle components

are available if

necessary. pg. 16

Step 2:

Remove the plugs

from the

adjustment holes

and discard.

Replacement plugs

are available, pg 16.

Step 3:

Remove the mylar

label. Order a new

one!

Step 4:

Using a pocket knife

split apart the two

component handles.

Step 5:

Remove the handles

and two component

material.

Alert:

Watch for the clear

plastic windows

falling out of the

handle.

Step 6:

Alert: IMPORTANT

Set the micro

adjustment to ZERO.

Alert:

Watch for any small

bb’s that might

escape when pulling

out on the

adjustment dial.

Step 7:

Remove the Lock

Screw with a #9

Torx bit.

Step 8:

Alert: IMPORTANT

Place a hand under

the fine adjustment

dial. Pull out

SLOWLY and catch

any bb’s or small

springs.

These provide

resistance and the

“click” during

movement.

Step 9:

Using a 4mm drift or

a press drive out

the Locking Pin.

Step 10:

Slowly remove the

entire mechanism

by pulling on the

end where the micro

dial was sitting.

(Black plastic cap).

Step 11:

As the mechanism is

being removed roll it

over so you can see

the switching group,

ramp and beam.

This will prevent the

“Click” spring from

falling on the floor.

Step 12:

Alert: IMPORTANT

DO NOT MESS with

the FINE

ADJUSTMENT DRIVE

This is key to the

calibration of the

wrench. If there are

any questions

contact Stahlwille

North America.

Step 13:

If the torque wrench

is not giving an

audible “click” when

reaching the desired

torque value the

“Click” Spring may

need to be replaced.

Simply lift off of the

Switching Group and

set in a new spring.

Step 14:

The Click Spring just

sits on the

Switching Group. It

is held in place by

the pressure of the

housing against the

spring.

Step 15:

Lubricate the

internal mechanism

of the wrench

before re-assembly.

MOS2 = Switching Group

contact points edges.

Microlube or other anti-

corrosive grease can be

applied on cam, beam &

surfaces. Wet or humid

environment coat all

internal surfaces.

Step 16:

Alert: IMPORTANT

Replace BB’s then

Small Springs and

then place a BB on

top of each spring.

Step 17:

Alert: IMPORTANT

Be sure to align

ZERO to the top of

the wrench as the

micro dial is re-

inserted.

It is highly

recommended you

do this with the

wrench as shown.

Straight up & down.

Step 18:

Alert: IMPORTANT

Press the Micro dial

down so it is

seated. MAINTAIN

PRESSURE on the

Micro dial to keep

the BB’s in place

when re-inserting

the mechanism into

the wrench housing.

Step 19:

Insert the “guts”

back into the torque

wrench tube. Lever

the insert to make

sure the “Click”

spring is seated

properly.

Alert: Remember to

keep pressure on

the Micro Dial!

Step 20:

Alert: IMPORTANT

Maintain constant

pressure on Micro

Dial and seat the

mechanism back in

the wrench.

IMPORTANT

TAPE over the micro

dial to the housing

to keep the Micro

Dial seated.

Step 21:

Drop the wrench

into a hand to help

slide the mechanism

to the proper

position.

Step 22:

A scribe can be

used to align the

locking pin hole to

the housing.

Step 23:

Insert the locking

pin and hammer into

place.

Alert: IMPORTANT

PEEN the Locking

Pin by placing the

housing on an Anvil

or vice and give it a

good WHACK!

Step 24:

Reinstall the Lock

Screw with #9 Torx

bit. Remove any

tape from the Micro

Dial being careful to

keep it seated!

Alert: IMPORTANT

Be sure ZERO is

facing the front of

the wrench!

Step 25:

Re-attach the two

component handle

making sure the

plastic windows are

in place.

Step 26:

Using the #7 Torx

bit screw together

the handle

components.

A small bit of RTV

may be placed in

the screw holes to

assure FOD security.

Step 27:

Alert: IMPORTANT

Make sure the Micro

Dial rotates freely

and clicks into

place. Note that the

scales are aligned at

top and bottom of

the range.

Zero on the micro

dial should match

the whole number

selected.

Step 28:

Make certain the

Micro Dial locks

properly when

pressed in.

Voila! Nice Job.

Any problems

simply repeat the

procedure or call

Stahlwille N.A.

•Install new sealing plugs on the adjustment holes or use a

similar anti-tamper material. (Mylar tape, putty, etc.)

•Calibration is required prior to returning the wrench to service.

Parts lists and exploded assembly diagrams in Index.

Questions or for more information:

Stahlwille North America - 719-473-3328 or [email protected]

730N Series

INDEXDiagrams & Parts Lists

730N/2 (Na/2)

730N

/2

(Na

/2

)

730N/5 (Na/5)

730N

/5

(Na

/5

)

730N/10 (Na/10) 730N

/10

(Na

/10

)

730N/12 730N

/12

730N/20 (Na/20) 730N

/20

(Na

/20

)

730N/40 (Na/40) 730N

/40

(Na

/40

)

730N/65 730N

/65

Documents

730N Series - Stahlwilleu-MIL Manual-09.pdf · 730N Series Torque Wrench Factory Calibrated Center Point Insert Size 730N/2, 730N/5, 730N/10, 730Na/ 2, 730Na/5, 730Na/10 17.5mm 9