Hirobo HI2521049 Shaft Collar for RC Rotors 5 x 8 x 1.5mm  [HI2521049]

5 x 8 x 1.5mm Collar for Small Rotating Parts

This compact shaft collar is intended as an RC-scale accessory for helicopter assemblies and other small rotating systems. The 5 x 8 x 1.5mm specification defines the bore, external diameter and thickness, so it is suitable where short axial spacing or a fixed shaft stop is required.

In use the collar provides a reliable mechanical stop and creates a repeatable positioning point for shafts and linkages. It helps preserve stack-up integrity between gears, bearings and spacers, aiding consistent play and preload when set up correctly.

Installation is straightforward: slide the collar to the desired location on the shaft and secure with your chosen method. When tuning rotorhead geometry or setting bearing preload, use the collar as a benchmark and confirm axial clearance after the final lock-up.

Hobby tips: ensure the bore equals your shaft size before fitting, inspect for burrs on mating parts, and re-check alignment after initial running. This product description applies to RC-scale model usage only.