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

Main shaft mast lock solution

This part is an RC-scale mast lock intended as a replacement collar for Hirobo Eagle Freya series components. The textured clamping surface is intended to keep the main mast stable during bench setup, periodic checks and tuning tasks without suggesting use on full-size aircraft.

The role is clear and specific: place the collar over the main mast to resist axial movement so pitch and rotor rigging remain consistent while you adjust linkages, inspect bearings or replace head hardware. The collar concentrates clamping pressure on the mast to help minimise slippage during bench adjustments.

Installation is straightforward when following standard helicopter maintenance steps. Slide the collar onto the mast, align with the set screw access and tighten with the correct hex driver until rotation and axial play are removed. Do not over-torque, perform a rotation and pitch check after fitting, and re-check after a short hover test when installed in the airframe.

The manufacturer lists this under Eagle Freya parts, so verify fit against your exact Eagle Freya variant before final installation. The accessory is supplied for hobby-scale maintenance, setup and tuning tasks.