The Hirobo HI0414177 is an RC spare bevel gear supplied with its shaft and intended for use in Eagle Freya helicopter assemblies. It is designed to replace a damaged or worn 20T bevel gear and restore the intended meshing between the gearbox and the bevel gear.
Fitment advice: confirm correct seating of the shaft and set axial clearance before completing assembly. Check engagement at low throttle and ensure surrounding bearings spin freely. Apply thread locker only where the kit documentation requires, and avoid excessive torque that can preload bearings or distort alignment.
Inspection checklist: when fitting the replacement, review adjacent components including bearings and the mating pinion for wear that could have caused the original failure, so the new gear is not compromised shortly after installation.
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