O.S. Engine OS74004071 Security Ring - for OMA-2820-950 Brushless Motor  [OS74004071]

Endbell retention for OMA-2820-950 motors

This security ring is an RC-scale accessory designed to work with OMA-2820-950 brushless motors, supplying a positive retention point for the motor endbell and shaft assembly. It interfaces with the motor's existing mounting features to limit axial movement under load and support stable pinion-to-spur contact.

Fitting is straightforward in a hobby workshop: place the ring onto the motor endbell so it seats against the factory features, then secure it using the motor's original fasteners or the vehicle's motor mount as appropriate. No tools beyond standard hobby hand tools are typically required, and the piece is sized to match common brushless motor endbell geometry.

In setup and tuning, this security ring is a subtle but useful addition: by holding the motor assembly steady it helps maintain gear mesh and reduces the chance of intermittent contact during high-speed runs or on rough surfaces. It suits builders who want reliable mechanical retention without altering motor electronics or mounts.