What are Freewheels

Freewheels consist of an inner and an outer ring between which clamping elements are arranged. Clamping elements can be sprags or rollers. Freewheels exhibit distinctive attributes that govern their operational dynamics. In one rotational direction, specifically during freewheeling operation, there is a notable absence of contact between the inner and outer rings. Conversely, when the rotation occurs in the opposite direction, contact between these rings takes place, enabling the transmission of substantial torque.

Freewheels are distinguished based on whether they possess bearing support or not. The concentric alignment of the inner and outer rings is essential for the smooth operation of freewheels. While freewheels with bearing support achieve this alignment automatically, those without necessitate the customer to provide the required concentric alignment for optimal functionality.

Applications of Freewheels

Backstops

Freewheels are used as backstops if the reverse rotation of the operating direction is to be prevented. In numerous machines and installations, ensuring a singular specified direction of rotation is imperative for technical safety and functional considerations. Consequently, legal regulations mandate the incorporation of mechanical safety devices, especially in applications like conveyor systems.

The typical functioning mode of a backstop involves freewheeling operation, where torque transmission is locked at zero speed. The prompt engagement of clamping elements during this phase guarantees the essential high level of operational safety.

Overrunning Clutches

Acting as overrunning clutches, these components interrupt contact between machines or machine parts when the driven part exceeds the speed of the driving part. This functionality can often replace more expensive externally actuated clutches, with engagement occurring during driving operations and interruption during freewheeling operations.

Indexing Freewheels

Indexing freewheels are responsible for translating back-and-forth motion into stepped rotation, enabling indexed feed. Indexing freewheels stand out for their precision and quiet operation, facilitating infinitely adjustable settings of the feed.

Conclusion

In the machine-building industry and aerospace sector, freewheels emerge as indispensable design elements. The efficiency, safety, and automation benefits make freewheels a preferred choice in the ever-evolving landscape of machinery design and operation.

HVH Industrial Solutions is an authorized distributor of Ringspann, GMN Bearing, Stieber Clutch, Formsprag Clutch and many other industry leading clutch manufacturers that offer a wide range of clutches for the most demending applications.

We work closely with their engineering teams to provide superior customer service and engineering support. 

If you have any questions, write to us via live chat or call or send us a quote request. The HVH team is always ready to help you.