Helicopter General Part Collar HI2521142 by Hirobo 2 x 3 x 3.8 F4X1.3  [HI2521142]

Part overview for rotor assemblies

This item is an RC helicopter general collar listed as Hirobo HI2521142, used as a locating and retention component in model assemblies. Verify the stamped measurement codes against your shaft or bore before choosing the part to ensure a correct fit.

Used in rotor or linkage subassemblies, the collar keeps components correctly spaced and aligned. To fit, slide the collar onto the shaft, secure it using the model's original fastening arrangement, and then check that the rotating parts move freely without lateral play.

Regularly check for wear, corrosion, or bending that could impair function. Replace the collar if signs of significant wear are present to protect adjoining components.