Shaft Clutches

Ratchet Arm Clutch

ratchet arm backstop clutch

We can manufacture a ratchet arm clutch or indexing clutch for rotary arm actuation or backstop clutch applications.

A very economical option is our backstop clutch for your conveyor system or use this device for rotary action in conjunction with a motor, hydraulic cylinder, pneumatic cylinder, or other mechanical means.

When attached correctly, these Ratched Arm Backstop Clutches can efficiently protect valuable product on any incline conveyors (not allowing the conveyor to back up), simply by mounting it on your primary drive shaft and attaching the ratchet arm end to a fixed position (see note below).

Inversely, when looking to drive through the clutch into the shaft there is no simpler and more compact indexing clutch than this. Due to an infinite number of potential engagement points on the circle (no cogs), these indexing clutches offer the ultimate flexibility in any application.

Download Product Details

Ratchet Arm Clutch Type RA Backstop Clutch
Assem. No. A B C D E F G L Standard Bores Rating
Torque Lbs./Ft. Speed RPM
RA14 .250 1/4 1-7/8 13/16 1-3/4 1-1/2 7/16 8-32 3/8, 1/2, 5/8 14 1800
RA100 .316 5/16 3-3/4 1-3/8 3-7/16 3 1 1/4-28 3/4, 7/8, 1, 1-1/8, 1-1/4 100 1000
RAB200 13/32 3/8 4-1/2 2-3/8 4-1/4 3-5/8 - 1/4-20 1-1/2, 1-3/4, 2 200 800
RAB500 17/32 3/8 6 2-17/32 5-1/2 4-3/4 - 5/16-18 2-1/4, 2-1/2, 2-3/4 500 600

NOTE: It is recommended on the ratchet arm ends to allow at least 1/16” free play either way on the axial plane. This allows for the cam and shaft to find their true parallelism with the ratchet housing. Tightening down and restricting the ratchet housing will cause misalignment, runout and all or some of the problems formerly listed.

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or call us today at 800-227-9083


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