RC Helicopter 3 x 6-12-10 x 11.2S Shaft Collar - Hirobo HI2521113  [HI2521113]

Retention collar for small-diameter shafts

This collar is offered as a compact retention item tailored to model helicopter shafts. It secures small parts axially and prevents sideways play that can affect rotor stability or bench adjustments.

To fit, select the correct shaft size, slide the collar into place and tighten the fixing method used by the collar design. Confirm components are aligned and the shaft turns freely after clamping to avoid introducing imbalance.

For maintenance tasks the collar acts as a simple positional stop for spacers and linkage ends, helping conserve trim settings. Use it when replacing bearings, setting end-play or locking components while making pitch and tail adjustments.