Hirobo HI2506011 Precision Flat Washer 3.5 x 9 x 1T for Rotor Assemblies  [HI2506011]

Precision flat washer for rotor assemblies

Supplied as a replacement component, this flat washer is listed under code HI2506011 for RC helicopter use. The designation 3.5 x 9 x 1T identifies inner diameter, outer diameter and thickness to help you pick the correct washer for small rotor components.

As a functional part, this washer evens load under screw heads or nuts and reduces lateral slack in linkages and rotor fittings. Correctly sized washers aid in micro-adjustments and help avoid direct metal-on-metal contact that leads to premature wear.

Fitting notes: check that the centre bore lines up with the shaft or pin, verify the outer diameter does not obstruct adjacent parts, and install it into the component stack before final torqueing to preserve spacing. Replace any washer that is bent, corroded, or shows a loss of thickness.

Tuning application: use the washer as a trimming shim when setting blade pitch linkages, adjusting rotor head preload, or removing minor endplay; fitting the correct thickness can tighten control feel without changing core hardware.