Home > TFC Ltd > High-Speed Electric Motor Demands Superior Retaining Ring Products

High-Speed Electric Motor Demands Superior Retaining Ring Products

TFC Ltd News and PR from TFC Ltd - Published 19 June 2018 Our engineers were faced with a problem when asked by one of our leading automotive electric motor OEM's to supply a 33mm external retaining ring capable of withstanding rotational speeds in excess of 17,000 rpm.
Our engineers were faced with a problem when asked by one of our leading automotive electric motor
OEM's to supply a 33mm external retaining ring capable of withstanding rotational speeds in excess of 17,000 rpm. Conventional external retaining rings (circlips) are limited by centrifugal forces when the forces involved are sufficient to lift the ring out of the groove and, in this case, our standard Spirolox® rings could only be considered suitable for rotational speeds of around 8,000 rpm.

The solution was found by supplying a special custom designed 'Self-Locking' ring that allowed the ring to function properly at higher rpm's. The self-locking feature utilises a small tab on the inside turn
of the ring that locks into a corresponding slot on the outside turn. In addition to withstanding higher rotational speeds, the ring is also capable of sustaining vibration, functioning under rapid acceleration and absorb a degree of impact loading.

All our Smalley Spirolox® rings are manufactured using a unique edge-winding process which is as flexible as it is precise and accommodates design changes without the need for additional tooling or die modifications. This process facilitates the development of prototypes allowing the production of low quantity custom orders quickly and economically. Even after the initial prototypes are produced, the
same process allows the design to be altered with simple machine adjustments or even a change of raw
material size.
Smalley Spirolox® rings are manufactured using a unique edge-winding process which is as flexible as it is precise

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