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Disk couplings are designed to operate under heavy loads while providing a certain degree of freedom for misalignment. The following series provide exceptional performance in this regard. Please use the selection chart to decide which series best fits your application.

Zero Backlash: All series of couplings listed below have zero backlash, ensuring no lost motion.

High Torsional Stiffness: A coupling with higher torsional stiffness receives less torsional displacement from the same load, which creates less wind up and allows quicker startup time for the connected shaft.

High Torque: A higher maximum allowable torque is desirable for heavier load applications.

Allowable Misalignment: A coupling with a higher degree of allowable misalignment will still allow power transmission in applications where axial shaft alignment is less precise.

DISK COUPLING GUIDE

MTD MDS MDD

MHS MHW

SERIESSpecial

Characteristics MDS MHWMHS

Zero Backlash

High Torsional Stiffness

High Torque

Allowable Misalignment

MDD

pg. 6-48 pg. 6-49 pg. 6-50 pg. 6-51CatalogPage pg. 6-47

MTD

E

V

E

E

V

V

E

V

V

V

E

V

V

E

E

V

E: Excellent V: Very good

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DOUBLE DISK FLEXIBLE COUPLINGS

ZERO BACKLASHLOW TORSIONAL STIFFNESSEXCELLENT RESPONSELIGHTWEIGHT

MATERIAL: Pins & Disks - Stainless SteelHubs & Spacer - Anodized Aluminum

SPECIFICATION:Bore Tolerance: .2500 & .3750 +.0009/-.0000

.5000 +.0011/-.0000

Other bore diameter combinations and bore sizes not exceeding the maximum listed below are available on special order.

Catalog Number ∆

Coupling Series(Ref.)

INCH COMPONENT

∆ To be discontinued when present stock is depleted.* Based on Max. Bore.

BBoreO.D. L

LengthSet

ScrewMax.Bore

Moment of Inertia*

oz. in.2

Static Torsional Stiffnesslbf in. / deg

Max.rpm

RatedTorquelbf in.

Weight *oz.

Max.LateralOffset

Max.Axial

Motion

Max.AngularOffset

1° 1.5°

2°

± .016± .020± .024

310002500019000

4.43 8.8517.70

S50MTD-078P...S50MTD-098P...S50MTD-126P...

.74 .951.52

.004

.006

.066

.142

.366

18.5432.4435.53

S50MTD-078P25P25S50MTD-078P37P37S50MTD-098P25P25S50MTD-098P37P37S50MTD-126P37P37S50MTD-126P50P50

.787

.984

1.260

.2500

.3750

.2500

.3750

.5000

1.075

1.079

1.083

#4-40

#6-32

.3150

.4724

.5512

ØB

L

O.D.

.295 .295SET SCREW2 AT EACH END

Rev: 9.11.13 JC

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6.20 8.85 22.13 30.98 79.66110.64

1000080006000500040003000

.034 .115 .394 .7113.3349.295

43.26 97.33247.20401.70478.95648.90

.32 .671.452.404.948.82

Coupling Series(Ref. Only)

Torquelbf in.

Max.rpm

Moment ofInertiaoz. in.2

StaticTorsionalStiffnesslbf in./deg

Weightoz.

S50MDS-074H…S50MDS-098H…S50MDS-126H…S50MDS-157H…S50MDS-196H…S50MDS-248H…

.748

.748

.984

.9841.2601.2601.5751.5751.9691.9692.4802.480

.1875 .2500 .2500 .3750 .3750 .5000 .5000 .6250 .6250 .7500 .75001.0000

.098

.098

.138

.138

.157

.157

.197

.197

.236

.236

.276

.276

.787

.787

.945

.9451.1421.1421.2991.2991.6541.6541.8111.811

.315

.315

.394

.394

.472

.472

.551

.551

.709

.709

.787

.787

.256

.256

.354

.354

.433

.433

.591

.591

.709

.709

.945

.945

#2-56#2-56#4-40#4-40#6-32#6-32#10-24#10-24#10-24#10-241/4-201/4-20

.315

.315

.472

.472

.591

.591

.787

.787

.984

.9841.1811.181

INCH COMPONENT

S50MDS-074H18H18S50MDS-074H25H25S50MDS-098H25H25S50MDS-098H37H37S50MDS-126H37H37S50MDS-126H50H50S50MDS-157H50H50S50MDS-157H62H62S50MDS-196H62H62S50MDS-196H75H75S50MDS-248H75H75S50MDS-248H99H99

BBoreO.D. S L D E Max.*

BoreCap

ScrewCatalog Number

* Other bore diameter combinations and bore sizes not exceeding the maximum listed above are available on special order.

CAP SCREW

E

E

L

S S

ØB

O.D.

D D

SPLIT HUB TYPEZERO BACKLASHHIGH TORSIONAL STIFFNESSMAINTENANCE-FREE

MATERIAL: Pins & Disks - Stainless Steel Hubs & Spacer - Aluminum Alloy

MISALIGNMENT COMPENSATION: Max. Angular Offset: .7° Max. Lateral Offset: 0 Max. Axial Motion: ± .008

SPECIFICATION: Shaft Tolerance: .1875 +.0000/-.0005 .2500 & .3750 +.0000/-.0006 .5000 & .6250 +.0000/-.0007 .7500 & 1.0000 +.0000/-.0008

SINGLE DISK FLEXIBLE COUPLINGS

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DOUBLE DISK FLEXIBLE COUPLINGS

SPLIT HUB TYPEZERO BACKLASHHIGH TORSIONAL STIFFNESSMAINTENANCE-FREEHIGH TORQUE

MATERIAL: Pins & Disks - Stainless SteelHubs & Spacer - Aluminum Alloy

MISALIGNMENT COMPENSATION:Max. Angular Offset: 1.5°Max. Axial Motion: ± .02

SPECIFICATION: Recommended Tolerance on Shaft: .1875 +.0000/-.0005 .2500 & .3750 +.0000/-.0006 .5000 & .6250 +.0000/-.0007 .7500 & 1.0000 +.0000/-.0008

Other bore diameter combinations and bore sizes not exceeding the maximum listed below are available on special order.

Catalog Number

Coupling Series(Ref. Only)

INCH COMPONENT

∆ Based on Max. Bore.

BBoreO.D. L

LengthCap

ScrewMax.BoreD ES

Moment of Inertia ∆

oz. in.2

Static Torsional Stiffnesslbf in. / deg

Max.rpm

RatedTorquelbf in.

Weight ∆oz.

Max.LateralOffset

B1DiskBoreDia.

S50MDD-074H18H18S50MDD-074H25H25S50MDD-098H25H25S50MDD-098H37H37S50MDD-126H37H37S50MDD-126H50H50S50MDD-157H50H50S50MDD-157H62H62S50MDD-196H62H62S50MDD-196H75H75S50MDD-248H75H75S50MDD-248H99H99

.3150 .3150 .4724 .4724 .5906 .5906 .7874 .7874 .9843 .98431.18111.1811

.335 .335 .492 .492 .630 .630 .827 .827 1.0241.024 1.3781.378

.748 .748 .984 .9841.2601.2601.5751.5751.9691.9692.4802.480

.1875 .2500 .2500 .3750 .3750 .5000 .5000 .6250 .6250 .7500 .75001.0000

.098

.098

.138

.138

.157

.157

.197

.197

.236

.236

.276

.276

1.061.061.221.221.571.571.731.732.242.242.402.40

.315

.315

.394

.394

.472

.472

.551

.551

.709

.709

.787

.787

.256 .256.354.354.433.433.591.591.709.709.945.945

#2-56#2-56#4-40#4-40#6-32#6-32#10-24#10-24#10-24#10-241/4-201/4-20

.005

.005

.006

.006

.006

.006

.048 .148 .525 1.039 4.42811.481

6.20 8.85 22.13 30.98 79.66110.64

S50MDD-074H...S50MDD-098H...S50MDD-126H...S50MDD-157H...S50MDD-196H...S50MDD-248H...

330002500019000150001200010000

30.90 69.51169.92216.27339.85463.43

.64 .88 2.12 3.53 7.4112.00

CAP SCREW

E

E

ØB1

S S

L

ØB O.D.

D D

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0 1Inch

HEAVY-DUTY SINGLE DISK FLEXIBLE COUPLINGS

ZERO BACKLASHHIGH TORSIONAL STIFFNESSHIGH TORQUEHIGH RESPONSE

MATERIAL: Pins & Disks - Stainless SteelHubs & Spacer - Anodized Aluminum

MISALIGNMENT COMPENSATION:Max. Angular Offset: 1°Max. Lateral Offset: 0Max. Axial Motion: ± .008

SPECIFICATION:Recommended Tolerance on Shaft:

.3750 +.0000/-.0006.5000 & .6250 +.0000/-.0007.7500 & 1.0000 +.0000/-.0008

Other bore diameter combinations and bore sizes not exceeding the maximum listed below are available on special order.

Catalog Number

Coupling Series(Ref. Only)

INCH COMPONENT

* Based on Max. Bore.

BBore D1 D C

Dia.O.D. LLength

CapScrew

Max.Bore

Moment of Inertia*

oz. in.2

Static Torsional Stiffnesslbf in. / deg

Max.rpm

RatedTorquelbf in.

Weight *oz.

.8661.1021.1021.5351.5351.7721.772

.3750 .3750 .5000 .5000 .6250 .75001.0000

.354

.472

.472

.591

.591

.709

.709

.539

.650

.650

.764

.764

.878

.878

1.261.571.571.971.972.482.48

.3937 .5512 .5512 .7874 .78741.00001.0000

#4-40#8-32#8-32#10-24#10-24#10-24#10-24

17.7035.4066.3088.50

19000150001200010000

1.261.501.501.731.731.97 1.97

S50MHS-126H...S50MHS-157H...S50MHS-197H...S50MHS-248H...

S50MHS-126H37H37S50MHS-157H37H37S50MHS-157H50H50S50MHS-197H50H50S50MHS-197H62H62S50MHS-248H75H75S50MHS-248H99H99

ØC O.D.

D1 D1

LD D

ØB

CAP SCREWEACH END

200.8432.5571.6772.4

1.342.334.246.71

.246 .6562.0234.592

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0 1Inch

HEAVY-DUTY DOUBLE DISK FLEXIBLE COUPLINGS

ZERO BACKLASHMEDIUM TORSIONAL STIFFNESSHIGH TORQUEHIGH RESPONSE

MATERIAL: Pins & Disks - Stainless SteelHubs & Spacer - Anodized Aluminum

MISALIGNMENT COMPENSATION:Max. Angular Offset: 2°

SPECIFICATION:Recommended Tolerance on Shaft: .3750 +.0000/-.0006.5000 & .6250 +.0000/-.0007.7500 & 1.0000 +.0000/-.0008

Other bore diameter combinations and bore sizes not exceeding the maximum listed below are available on special order.

Catalog Number

Coupling Series(Ref. Only)

INCH COMPONENT

* Based on Max. Bore.

BBore

B1DiskBore

D1 D CDia.O.D. L

LengthCap

ScrewMax.Bore

Moment of Inertia*

oz. in.2

Static Torsional Stiffnesslbf in. / deg

Max.rpm

RatedTorquelbf in.

Weight *oz.

Max.LateralOffset

Max.Axial

Motion

.8661.1021.1021.5351.5351.7721.772

S50MHW-126H37H37S50MHW-157H37H37S50MHW-157H50H50S50MHW-197H50H50S50MHW-197H62H62S50MHW-248H75H75S50MHW-248H99H99

.3750 .3750 .5000 .5000 .6250 .75001.0000

.354

.472

.472

.591

.591

.709

.709

.539

.650

.650

.764

.764

.878

.878

1.571.811.812.052.052.282.28

1.261.571.571.971.972.482.48

.3937 .5512 .5512 .7874 .78741.00001.0000

#4-40#8-32#8-32#10-24#10-24#10-24#10-24

.591 .787 .787 .984 .9841.2601.260

154.48231.71308.95386.19

S50MHW-126H...S50MHW-157H...S50MHW-197H...S50MHW-248H...

1.692.865.308.12

.006

.008

.008

.012

.339 .8752.5156.014

17.7035.4066.3088.50

19000150001200010000

± .016± .020± .024± .031

CAP SCREWEACH END DD

L

ØB1

D1 D1

ØB ØC O.D.

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INCH COMPONENT

S50DCM-10S50DCM-10H02S50DCM-10H03S50DCM-10H04S50DCM-10H05S50DCM-17S50DCM-17H03S50DCM-17H04S50DCM-17H05S50DCM-20S50DCM-20H04S50DCM-20H05S50DCM-20H06S50DCM-20H08

Fig.No. O.D.

CHubDia.

DHub

LengthA Set

Screw

No.of

MagnetsL

BBore+.001 -.000

Catalog Number

1.371.371.37

146

1.458

425002600023000

.03

.08

.17

.22

.50

.60

Coupling Series(Ref. Only) OAL

Specifications for Two Hub Halves

Torquelbf in.

Max.rpm

S50DCM-10...S50DCM-17...S50DCM-20...

Breakaway Torquelbf in.

hp @ 1750rpm

Max.Weight lb.

.500BoreW Width (+.002/-.000)T Height (+.010/-.000)

Fig. 2 Keyway Dimensions

.1250

.560

AIR GAP*

OALHIGH ENERGY

MAGNETS

OAL

.188AIR GAP

HIGH ENERGYMAGNETS

O.D.ØC

AD

L

ØB

CHAMFER BOTH ENDS

Fig. 2 With Keyway

AD

L

O.D.

CHAMFER BOTH ENDS

ØC

ØB

Fig. 1 Without Keyway

SET SCREW

SET SCREW

T

W

KEYWAYDATA

MAGNETIC DISK COUPLINGS

CAUTION: Be prepared for strong magnetic attractionbetween the magnet hubs.

MATERIAL:Hub - 416 Stainless SteelSet Screw - Stainless SteelMagnet - NdFeB, Nickel Plated

MISALIGNMENT COMPENSATION:Max. Angular Offset: 3°Max. Parallel Offset: .25

SPECIFICATIONS:Air Gap* Catalog Numbers S50DCM-10: .125 S50DCM-17: .188 S50DCM-20: .188

MAX. OPERATING TEMPERATURE:+284°F

TO MAKE COUPLING:Select two hub halves with thesame O.D. from the table below.

Priced Per Hub Half

11111111111112

Continued on the next pageREV: 9.10.14 JC

1.061.061.061.061.061.721.721.721.721.971.971.971.971.97

.81

.81

.81

.81

.81

.81

.81

.81

.811.121.121.121.121.12

—#4-40#8-32#8-32#8-32

—#8-32#8-32#8-32

—#10-32#10-32#10-32#10-32

66666666688888

.63

.63

.63

.63

.63

.59

.59

.59

.59

.59

.59

.59

.59

.59

.25

.25

.25

.25

.25

.25

.25

.25

.25

.25

.25

.25

.25

.25

.12

.12

.12

.12

.12

.12

.12

.12

.12

.12

.12

.12

.12

.12

Solid.125.1875.250.3125Solid.1875.250.3125Solid.250.3125.375.500

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11222122222

2.362.362.362.362.362.862.862.862.862.862.86

1.501.501.501.501.502.002.002.002.002.002.00

—#10-32#10-32#10-32#10-32

—#10-32#10-32#10-32#10-321/4-20

1010101010141414141414

.75

.75

.75

.75

.751.001.001.001.001.001.00

.35

.35

.35

.35

.35

.53

.53

.53

.53

.53

.53

.16

.16

.16

.16

.16

.28

.28

.28

.28

.28

.28

Solid .375 .500 .625 .750Solid

.500 .625 .750 .8751.000

INCH COMPONENT

S50DCM-24S50DCM-24H06S50DCM-24H08S50DCM-24H10S50DCM-24H12S50DCM-29S50DCM-29H08S50DCM-29H10S50DCM-29H12S50DCM-29H14S50DCM-29H16

Fig.No. O.D.

CHubDia.

DHub

LengthA Set

Screw

No.of

MagnetsL

BBore+.001 -.000

Catalog Number

1.692.19

915

1220

1900016000

.25

.431.22.5

Coupling Series(Ref. Only) OAL

Specifications for Two Hub Halves

Torquelbf in.

Max.rpm

S50DCM-24...S50DCM-29...

Breakaway Torquelbf in.

hp @ 1750rpm

Max.Weight lb.

BoreW Width (+.002/-.000)T Height (+.010/-.000)

Fig. 2 Keyway Dimensions.625.500 .750 .875 1.000

.1875

.709.1250.560

.1875

.837.1875.964

.25001.114

MAGNETIC DISK COUPLINGS

CAUTION: Be prepared for strong magnetic attractionbetween the magnet hubs.

MATERIAL:Hub - 416 Stainless SteelSet Screw - Stainless SteelMagnet - NdFeB, Nickel Plated

MISALIGNMENT COMPENSATION:Max. Angular Offset: 3°Max. Parallel Offset: .25

MAX. OPERATING TEMPERATURE:+284°F

TO MAKE COUPLING:Select two hub halves with thesame O.D. from the table below.

Priced Per Hub Half

AIR GAP*

OALHIGH ENERGY

MAGNETS

OAL

.188AIR GAP

HIGH ENERGYMAGNETS

O.D.ØC

AD

L

ØB

CHAMFER BOTH ENDS

Fig. 2 With Keyway

AD

L

O.D.

CHAMFER BOTH ENDS

ØC

ØB

Fig. 1 Without Keyway

SET SCREW

SET SCREW

T

W

KEYWAYDATA

Continued from previous page

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