Answer
Self-locking spiral rings are designed for applications where centrifugal forces exceed the standard rotational capacity of the ring. They feature a 'tab' on the inner turn that fits into a 'slot' on the outer turn. As the shaft rotates and centrifugal force tries to expand the ring, the tab and slot mechanically lock together, preventing the ring from opening. This feature is common in transmission shafts and high-speed electric motor rotors. Installation of self-locking rings requires a specific sequence: the ring must be seated in the groove, and then the locking turn must be manually 'clicked' into place. Once locked, the ring is significantly more difficult to remove, making it ideal for safety-critical components that must remain assembled under extreme dynamic conditions.
