Hirobo HI2521094 Collar 3 x 4 x 8.5F shaft collar for RC helicopter components  [HI2521094]

Small shaft collar for model helicopters

This Hirobo HI2521094 collar is a compact RC-scale accessory intended for use on model helicopter and general shaft assemblies. The item carries the dimension marking 3 x 4 x 8.5F which serves as the part reference when matching with shaft or component fittings.

In practice the collar functions as a locating and retaining element, helping to fix small rotating components such as rotor or tail assemblies during setup and tuning. It is designed to be used where a small, low-profile collar is needed to maintain axial position of parts on a model shaft.

Installation is straightforward for hobby workshop use: align the collar to the appropriate position on the shaft that matches the marked dimensions, then secure using the compatible fastening method for your model. Check fitment visually and during slow rotation before full operation to confirm correct seating.