ROLLER OR SPRAG FREEWHEELS FROM STIEBER

17 February 2025

Combidrive Ltd supply both Roller and Sprag One Way Clutches (Freewheels)

STIEBER TYPE ROLLER DESIGN – A number of roller elements are trapped between a cylindrical outer right and a hub or starwheel which has a flat platform for each roller. A spring and a plunger holds the roller in position. Rotation in one direction immediately traps the roller between starwheel and ring and in the other direction the roller is relaxed to allow freewheeling.

SPRAG TYPE – Two concentric cages with holes punched in them contain sprag locking elements. A ribbon spring situated between the cages energises each sprag. When placed between two cylindrical races the assembly allows freewheel in one direction and in the other locks up.

ONE WAY CLUTCHES – These fulfill one or more of the following functions in any one of the following applications;-

Indexing- Imparting an intermittent feed from a reciprocating source e.g a press feed mechanism, conveyor drive or packing machine feed system.

Backstopping – Allowing a shift to rotate in one direction only, but preventing reverse rotation for safety and/or control of the machine. Frequently used in conjunction with an indexing clutch or to control reversal in pump drives or inclined conveyors.

Overrunning – Allowing one part of the machine to continue rotating whilst another part is held stationary or allowed to run at a lower speed, as in the case of inching drives, two speed drives or starter motor drives.

OVERALL BORE RANGE 4MM-150MM AND OVERALL TORQUE RANGE 1 NM-23,000 NM.