Precision Shaft Stop 2.6 x 4 x 9F - Hirobo HI2521093 for RC Helicopters  [HI2521093]

Shaft locator for scale helicopter use

The Hirobo HI2521093 collar serves as a compact shaft locator in model helicopter assemblies, providing a fixed axial stop for rotor and drive shafts. The numeric code in the part name references the collar sizing and intended shaft fit.

Installation typically involves sliding the collar to the chosen position on the shaft and securing it with the collar's fastening method. Ensure proper alignment with adjacent components, use the recommended hex driver and torque, and inspect for rotational freedom and clearance after tightening.

In workshop setups, this accessory reduces play and helps preserve predictable linkage and rotor geometry during tuning. Always verify the collar matches your shaft diameter and the mating parts listed by the vendor before final assembly.