Hirobo HI2521094 3 x 4 x 8.5F Precision Shaft Collar for RC Helicopters  [HI2521094]

Low-profile shaft collar for scale helicopters

The Hirobo HI2521094 collar is designed as a compact accessory for model helicopter and general shaft assemblies. Its 3 x 4 x 8.5F marking identifies the size so you can match it with shafts and fittings used in your model.

As a locating and retaining component, the collar helps secure small rotating parts such as tail or rotor elements during setup and trimming. It is suited where a narrow, unobtrusive collar is required to keep parts in the correct axial position on a shaft.

Fitting is simple: slide the collar to the correct position on the shaft that corresponds with the marked dimensions, then fasten using your model's compatible method. Inspect seating and test under slow rotation to ensure everything is seated correctly before full operation.