Spinner Cone 30mm for 4.0mm Motor Shaft - Hirobo HI0005025  [HI0005025]

Lightweight Spinner for Small Electric Models

This Hirobo HI0005025 spinner suits RC-scale aircraft that use a 4.0mm motor shaft and a 30mm spinner size. The combination of a light spinner cone with an aluminium backplate gives a stable mounting surface against the motor while keeping the forward assembly compact for small electric planes.

Fitting notes for modellers: the spinner cone is intended to centre on a 4.0mm shaft bore and the aluminium backplate is positioned against the motor face to pass clamp forces. Employ the fastening method advised by your motor supplier and check axial clearance to the propeller or collet before the first flight.

Tuning impact: a spinner alters the propeller balance and can change vibration at operating rpm. Perform static and dynamic balancing after installation and recheck after initial flights. If vibration remains, inspect seating, backplate contact, and shaft alignment. This accessory helps streamline airflow at the prop hub and gives a finished nose appearance.