Centrifugally Lift Off Sprags Freewheels RDBK

The type RDBK is a centrifugal lift-off sprag RSCI high speed backstop equipped with an integral torque limiter. The latter limits the backstop transmissible torque to a factory set-up value according to customer request.

This design will be used mainly as a backstop in multidrive systems, such as on large inclined conveyors, where two or more backstops share the reverse load.

The torque limiting function is performed through a multi-disc brake working in oil. This solution provides a high torque density of the complete unit and ensures that the set slip torque remains constant over the working life regardless of the environmental conditions.

The RDBK sub-assembly, which rotates backward under overload, is fully bearing supported. The unit can perform as many reverse rotations as possible (within the limits of energy dissipation) to completely unload the conveyor before maintenance work is carried out. Within some time intervals, this type can rotate regularly backward damage free.

The option of a release function manually actuated is also available. A hydraulic solution is the preferred one. Nevertheless, a full mechanical one can be supplied. The release is performed using a simple hand pump to actuate the internal hydraulic cylinder, progressively releasing the backstop.

The backstop function is of the built-in design. The outer part must be centered and fixed on the machine housing. The run-out and squareness tolerances must be respected.

Check the Sprag Clutch RDBK Catalog to select the best model for your application.

HVH Industrial works with manufacturers' specialized engineering teams to meet our customer's requirements and the highest quality standards. 

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