KYOSHO H6004 Concept 60 Spindle Replacement Shaft  [KYH6004]

Heavy-duty spindle for Concept 60

The KYOSHO H6004 spindle shaft serves as an exact replacement part for Concept 60 rotor systems. It transfers loads between the rotor hub and the transmission, restoring correct axial positioning and reducing wobble that can occur with a fatigued or bent shaft.

For service, strip the rotor head and remove retaining hardware, inspect adjacent bearings and gear faces for damage, seat the replacement spindle in the original location, ensure it rotates smoothly without binding, check endplay, then secure fasteners and re-confirm tracking. Correct bearing condition and seating are essential for the shaft to perform as intended.

Swapping in a fresh spindle is a common tuning and repair step to eliminate vibration causes and stabilise rotor response; perform a balance check and brief hover trial before returning to full-power flights. Store replacements dry and lightly lubricated to avoid rust.