Hirobo HI2521134 Collar 3x6x12.25 RC Helicopter Replacement  [HI2521134]

Alignment Sleeve for Rotor Assemblies

This RC-scale collar is offered as a general replacement in the Hirobo helicopter parts range. The HI2521134 code denotes the 3 x 6 x 12.25 dimension, chosen for situations where accurate axial location and concentric alignment are required.

Functioning as an axial stop and alignment sleeve, the part sits inside transmissions or rotor hubs. When replacing parts, check mating dimensions, remove contaminants from contact surfaces, position the collar onto the shaft or into the bore, and use the original retention method supplied with your model. Follow up installation with runout and axial play checks to confirm reliable, long-term operation.