Hirobo HRB-0414312 - Hard Grip Mast Lock 10  [HRB-0414312]

Mast retention collar overview

This RC-scale mast lock is specified as a replacement collar for Hirobo Eagle Freya series components. The hard-grip contact area helps secure the main mast during bench setup, checks and tuning procedures while avoiding any suggestion of full-scale aircraft use.

Its function is simple: seat the collar over the main mast to prevent axial movement so pitch and rotor alignment stay stable while you adjust linkages, inspect bearings or change rotor head parts. The collar is designed to concentrate clamping force to reduce slippage during bench adjustments and test runs.

Installation follows common helicopter maintenance practice. Position the collar on the mast, line up the set screw access and tighten with an appropriate hex driver until rotation and axial play are eliminated. Avoid over-tightening; perform a quick spin and pitch check after fitting and verify again after a brief hover trial on the airframe.

The part is listed under the Eagle Freya parts category, so confirm fit with your exact Eagle Freya variant prior to final installation. This accessory is supplied for hobby-scale maintenance, setup and tuning activities.