Flexible Couplings

Flexible CouplingsMCS Couplings

This three-piece coupling adopts an aluminum alloy hub and a resin spider. The simple construction ensures that the high torque generated by a gear motor can be transmitted reliably. The proper elasticity of the spider suppresses motor vibration.

Selecting a Coupling

Select the Coupling Type below based on your Motor Item. When selecting a coupling please note the motor shaft diameter can be used for either D1 or D2 of the coupling. Once the motor shaft diameter is determined, the driven shaft diameter can be selected from the alternate value.

Imperial Shaft Couplings

Type

Motor Model

Load Type

Coupling Type

Motor Shaft Diameter

Nominal Torque

Parallel Shaft
Gearhead* (Imperial Shaft)

BMU230

Uniform Load

MCL30

3/8 in.

110 lb-in
(12.5 N•m)

Shock Load

MCL40

220 lb-in
(25.0 N•m)

BMU460

Uniform Load

MCL40

5/8 in.

220 lb-in
(25.0 N•m)

Shock Load

MCL55

530 lb-in
(60.0 N•m)

BMU5120

Uniform Load

MCL55

3/4 in.

530 lb-in
(60.0 N•m)

Shock Load

BMU6200
BMU6400

Uniform Load

MJC65

7/8 in.

2832 lb-in
(320 N•m)

*Couplings available for Round Shaft and Standard Parallel Shaft Gearheads only. Excludes Foot Mount and Stainless Steel Shaft types.

Metric Shaft Couplings

Type

Motor Model

Load Type

Coupling Type

Motor Shaft Diameter

Nominal Torque

Round Shaft
(No Gearhead)

BMU230

Uniform Load

MCL20

0.315 in.
(8 mm)

44 lb-in
(5.0 N•m)

Shock Load

MCL30

110 lb-in
(12.5 N•m)

BMU260

Uniform Load

MCL20

0.315 in.
(8 mm)

44 lb-in
(5.0 N•m)

Shock Load

MCL30

110 lb-in
(12.5 N•m)

BMU5120

Uniform Load

MCL30

0.4724 in. 
(12 mm)

110 lb-in
(12.5 N•m)

Shock Load

MCL40

220 lb-in
(25.0 N•m)

BMU5200
BMU5400

Uniform Load

MCL40

0.5512 in.
(14 mm)

220 lb-in
(25.0 N•m)

Shock Load

Parallel Shaft
Gearhead*
(Metric Shaft)

BMU230

Uniform Load

MCL30

0.3937 in.
(10 mm)

110 lb-in
(12.5 N•m)

Shock Load

MCL40

220 lb-in
(25.0 N•m)

BMU460

Uniform Load

MCL40

0.5906 in.
(15 mm)

220 lb-in
(25.0 N•m)

Shock Load

MCL55

530 lb-in
(60.0 N•m)

BMU5120

Uniform Load

MCL55

0.7087 in.
(18 mm)

530 lb-in
(60.0 N•m)

Shock Load

BMU6200
BMU6400

Uniform Load

MCL65

0.8661 in.
(22 mm)

1410 lb-in
(160 N•m)

*Couplings available for Round Shaft and Standard Parallel Shaft Gearheads only. Excludes Foot Mount and Stainless Steel Shaft types.