Clutches
Clutches transmit or cut rotation between two power transmission shafts.
The line-up includes Cam Clutches (one-way clutches) and SR Clutches (single-revolution clutches). Cam Clutches are mechanical non-backlash structures with a number of cams arranged between the inner and outer races and are available for three different applications: backstop, overrun and indexing.
With a simple lever operation, SR Clutch can give a single or an integer revolution at the correct timing from the continuously rotating outer race (drive side) to the inner race (load side).
What's New / Product Information
Cam Clutch (One-way Cam Clutches )
When it comes to mechanical One-Way Clutches, Tsubaki Cam Clutch is the best
This is a mechanical one-way clutch. It uses multiple cams arranged so that there is no backlash.
Cam clutches have three applications: backstop, overrun, and indexing.
SR Clutch (Single Revolution clutch )
SR Clutches provide a single or integer revolution from the continually rotating outer race (drive side) to the inner race (load side) by simply pulling a lever.
Because the inner and outer races are designed to engage, the clutch transmits highly reliable and accurately timed drive motions not possible with clutches based on friction mechanisms, ratchet mechanisms, or pin and key mechanisms.
Product Lineup for Clutches
Back stopping
Also called reverse rotation prevention. The Cam Clutch continues overrunning when the machinery is in operation, and it engages if reverse rotation occurs unexpectedly.
Backstop is used to prevent the shaft from rotating in the reverse direction.
The Cam Clutch continues overrunning while the shaft is rotating in the forward direction, and it engages to prevent reverse rotation when attempting to reverse rotation.
Example of reverse rotation prevention on a conveyor
| Cam Clutch Motion | |
|---|---|
 |
It is mainly used for inclined conveyors or vertical conveyors, and prevents the conveyor from reversing due to breakage of the drive chain and causing accidents due to the fall of cargo. |
BS Series
Model No. BS～
Exclusively used in backstop applications for conveyors (low speed)
- ・BS Series uses a cam and roller structure.
- ・Shuts out fine dust with its superior dust-proof construction.
- ・High reliability through the use of specially developed cams.
- ・For sizes BS30 to BS135, the Cam Clutches are prelubricated with grease, eliminating the need for lubrication.
- ・Low-speed overrunning type to be mounted on the end rotating shafts of conveyors and pump.
Range of
Shaft Diameters mm
Φ30～Φ450
Torque range N・m
294～686000
MG-R Series
Model No. MG□□R～
Intended for use in backstop applications for conveyors (medium speed).
- ・For ease of maintenance, an oil reservoir is attached to the MG Series Cam Clutch.
- ・Used for medium-speed overrunning applications and can be mounted on the middle shafts of reducers.
Range of
Shaft Diameters mm
Φ19～Φ250
Torque range N・m
314～176000
BR & BR-P Series
Model No. BR～ BR□□P～
Longer service life can be expected as the cams do not contact the inner and outer races during high-speed rotating operations.
- ・Longer service life can be expected as the cams do not contact the inner and outer races during high-speed rotating operations. This Cam Clutch is used for high-speed overrunning applications.
- ・Used in high-speed rotation, low-speed engagement, and backstop applications.
- ・The BR type is a motor shaft-mounted type.
- ・The BR-P type has a bearing built in and can be used as is.
Range of
Shaft Diameters mm
Φ20～Φ240
Torque range N・m
306～62034
MA Series
Model No. MA～
Uses cams that can respond to shock loads.
- ・The cam with excellent impact resistance is used to firmly receive the shock load.
- ・Developed mainly for applications to prevent the arms of pitching machines and tennis machines from moving.
- ・No lubrication maintenance required.
- ・All models are always in stock for immediate delivery.
Range of
Shaft Diameters mm
Φ20～Φ30
Torque range N・m
176～510
BS-F Series
Model No. BS□□□F～
New design for tough environment, high torque, long life, compact and drop in structure
- ・Special double lip oil seal and multi temperature grease for wide temperature range
- ・Ingenious backstop mechanism
- ・The narrowest width with I-beam structure makes easy installation for customer's current layout
- ・Down sizing and High speed
Range of Shaft Diameters mm
Φ60～Φ465
Transmission Torque N・m
6760～980000
BR-HT Series
Model No. BR□□□HT～
BR-HT Cam Clutch is High Torque version of existing BR series.
- ・BR-HT Cam Clutch is High Torque version of existing BR series.
- ・Backstop applications for high-speed overrunning
- ・Greatly Increased Service Life
- ・Lift Off design, Non rollover design, Lower speed lift-off
- ・A more economical design
Range of Shaft Diameters mm
Φ20～Φ320
Transmission Torque N・m
105～366000
