Product Info Clutch
A mechanical element that transmits and blocks rotation between two power transmission shafts.
There are two types of lineup: cam clutches (one-way clutches) and SR clutches (single rotation clutches). Cam clutches have a mechanical non-backlash structure with many cams arranged between the inner and outer race, and are available for three different uses: backstop, overrunning, and indexing.
With a simple lever operation, the SR clutch can give a full rotation or an integer number of rotations from the continuously rotating outer race (drive side) to inner race (load side) with precise timing.
table of contents
Clutch related information
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Selection
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Materials
What is a Cam Clutch (One-Way Clutch)?
When it comes to mechanical one-way clutches, Tsubaki's Cam Clutch comes to mind.
This is a mechanical non-backlash one-way clutch with an arrangement of multiple cams.
The lineup is divided into three categories: backstop, overrunning, and indexing.
What is an SR clutch (single rotation clutch)?
The SR clutch is a clutch that, with a simple lever operation, gives one or an integer number of revolutions from the continuously rotating outer race (drive side) to inner race (load side).
The mechanism in which the inner and outer race mesh enables highly reliable and accurate timing drive that is not possible with clutches using friction mechanisms, ratchet mechanisms, or pin and key mechanisms.
Clutch product list
Overrunning
A method of operation in which the inner and outer races of a cam clutch are engaged to transmit torque, and outer race continue to rotate freely due to differences in rotation speed and direction.
It's similar to the freewheeling motion of a bicycle.
Two-speed drive example
The diagram shows an example of a cam clutch used for two-speed drive.
The low-speed drive gear motor operates continuously.
To switch to high-speed drive, turn on the high-speed drive motor.
| Cam clutch operation | |
|---|---|
| When driving at low speed | When driving at high speed |
 |
 |
| Cam clutch A engages, Cam clutch B is idling |
Cam clutch A is idling. Cam clutch B is engaged |
Example of roller conveyor transfer
The diagram shows an example of a cam clutch used in the area where the transported material moves from the high-speed side to the low-speed side.
The roller conveyor is driven by a gear motor via a chain.
At this time, the cam clutch engages from outer race side.
When conveyed material enters the low-speed side from the high-speed side, the inner race tries to rotate in the direction of the arrow at a faster speed than outer race. At this time, the cams are not in meshing orientation, so the inner race idles.
When the speed of the conveyed material slows down and the rotational speeds of outer race and inner race become the same, the engagement returns to outer race side.
| Cam clutch operation | |
|---|---|
| When the roller is driven | When material enters |
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Advantages of using a Cam Clutch
- - Switching is possible by simply turning the high-speed motor on and off.
- - Switching operation is possible even when the drive is distributed to multiple axes from the main motor.
MZ Series
Model number MZ～
This type can be used for the widest range of applications.
- -This type can be used for a wide range of applications, from low speeds to high speeds.
- All types in stock and ready for immediate delivery.
- - Sprockets and other parts are attached using the inner circumference of outer race as the spigot.
- - Grease is already packed in. No lubrication maintenance is required.
- - Coupling type (MZ-C) is also available.
- -Can also be used for indexing and backstops.
Shaft diameter range mm
Φ15～Φ70
Torque range N・m
186～3040
MZ-G Series
Model number MZ□□G～
This is the MZ series outer race peripheral grinding specification.
- - Sprockets and other parts are attached using the outer race periphery as a spigot.
- -Can be used for a wide range of applications, from low speeds to high speeds.
- All types in stock and ready for immediate delivery.
- - Grease is already packed in.
- - No lubrication maintenance is required.
- -Can also be used for indexing and backstops.
Shaft diameter range mm
Φ15～Φ70
Torque range N・m
186～3040
MG Series
Model number MG~
This is a representative overrunning model.
- - Compact and has high torque capacity.
- -Suitable for medium to low speed overrunning.
- - Excellent wear resistance during idling.
- - Coupling type (MG-C) is also available.
Shaft diameter range mm
Φ19～Φ250
Torque range N・m
314～176000
PB Series
Model number PB~
outer race is a sleeve, making it easy to mount sprockets, gears, pulleys, etc. with small outer diameters.
- - Gears, sprockets, pulleys, etc. with small outer diameters can be keyed to outer race.
- -Suitable for low to medium speed applications.
- - Oil-impregnated metal bearings are used.
- All types in stock and ready for immediate delivery.
Shaft diameter range mm
Φ10～Φ45
Torque range N・m
29.4～2110
200 Series
Model number B~
This type is attached directly to the shaft and has no inner race.
- -Can be compactly installed inside sprockets, gears, etc.
- -Suitable for low to medium speed applications.
- ・Custom inner race can be manufactured upon order.
Shaft diameter range mm
Φ25～Φ42
Torque range N・m
39.2～1400
LD Series
Model number LD~
This is an economy type that is easy to install and handle.
- -An economy type that is easy to install and handle.
- - Grease-filled type, no regreasing is required.
- All types in stock and ready for immediate delivery.
Shaft diameter range mm
Φ10～Φ30
Torque range N・m
5.88～49
ML Series
Model number ML～
Suitable for medium loads, easy to install, and enables compact design.
- - The cam and roller structure allows the rollers to act as bearings, making a compact design possible.
- - Grease is packed in. No lubrication maintenance is required.
- -We also have a selection of 2GD types with dust seals.
It has excellent dust resistance and can be used in dusty places. - - A retaining ring for the shaft is included when shipped.
- -Suitable for medium to low speed and medium load applications.
Shaft diameter range mm
Φ15mm～Φ80mm
Torque range N・m
70～2300
MR Series
Model number MR~
This is a cam clutch designed specifically for outer race slip.
- - When outer race is idling, the cam lifts off (floats up), eliminating contact with inner race, providing excellent resistance to idling wear.
- - Since it is designed for continuous high-speed outer race idling, the meshing rotation speed should be low.
Shaft diameter range mm
Φ85～Φ160
Torque range N・m
9500～33800
BB Series
Model number BB~
The bearing (6200 series) and cam clutch are integrated.
- - Compact design: Combines the functions of a one-way clutch and a bearing in a small space, allowing for effective use of space.
- Easy to install: Two types of installation onto the shaft or housing are available: press fit and key-fixed.
- - Increased torque capacity: By arranging multiple cams between the inner and outer races, it is possible to transmit larger torque than with a shell-type roller clutch.
- ・All types in stock: We also have a selection of products with oil seals, taking into consideration the environment in which they will be used.
Shaft diameter range mm
Φ15～Φ40
Torque range N・m
29～260
