This item is the Hirobo HI0414179 universal shaft, available in two nominal lengths, 34mm and 38.5mm, and intended for RC helicopter maintenance and component replacement. It suits situations where a short drive or linkage shaft is required to meet compact assembly geometry.
The shaft serves to transfer rotational or oscillating motion between hubs or control linkages while allowing straightforward installation in confined spaces. When replacing a shaft, confirm the overall length, check spline fit if applicable, and assess axial play to ensure correct alignment with adjacent gears and bearings.
Fitment guidance: secure the shaft with original retaining hardware or equivalent fasteners, verify there is no interference with frames or bearings, and ensure smooth rotation through the intended travel. Watch for end-play and any new vibration, since modest length changes can impact tail or rotor tracking and should be corrected with minor linkage adjustments.
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