Hirobo HI0005025 30mm Spinner with Aluminium Backplate for 4.0mm Shaft  [HI0005025]

30mm Spinner and Backplate Overview

This Hirobo HI0005025 spinner is intended for RC-scale airplanes that use a 4.0mm motor shaft and a 30mm spinner diameter. The lightweight spinner cone pairs with an aluminium backplate to present a firm mounting surface that bears against the motor face while keeping the nose profile compact for small electric models.

Fitting the unit is straightforward for competent modellers: the spinner cone should align concentrically with your 4.0mm shaft bore, and the aluminium backplate sits against the motor to transmit clamp force. Follow the motor manufacturer's recommended attachment method and ensure there is adequate axial clearance relative to the propeller or collet system before flight.

Tuning and vibration advice: adding a spinner influences the propeller's balance and can modify vibration at operating speeds. Balance the assembly after installation and after initial flights, and inspect seating, backplate contact, and shaft alignment if any vibration shows. This part mainly smooths airflow at the prop hub and finishes the nose on electric model aircraft.