Hirobo HI2521094 Shaft Collar - 3 x 4 x 8.5F for RC Helicopter Parts  [HI2521094]

Shaft collar for helicopter models

The Hirobo HI2521094 collar is a compact accessory for model helicopter and general shaft assemblies. The size marking 3 x 4 x 8.5F is the reference used when checking compatibility with shafts and component fittings.

Functioning as a locating and retaining element, the collar helps hold small rotating components such as tail or rotor assemblies in position during setup and fine tuning. It is intended for applications where a low-profile collar is required to maintain axial location on a model shaft.

Fitting is uncomplicated: place the collar at the designated position along the shaft that matches the stamped dimensions, then secure it with the appropriate fastening method used on your model. Perform a visual check and a slow rotation test to confirm correct seating before full operation.