Makita BHP453 Drill Gear Assembly Part

by thunderstorm-euphoria

Makita BHP453 speed change repairThe speed change mechanism relies on a clutch that locks a ring gear. The teeth of the plastic part that locks the ring gear had worn away.Replacement part modeled in FreeCAD 0.21.2Printing:Printed on a Prusa XL with 0.4mm nozzleFilament: Prusament PETG-CF0.15mm layer height4 perimeterssupports only on build plate It fit perfectly, without postprocessing, except for support removal.I lubricated the sliding parts with a bit of vaseline. The original part is made from PA66-GF33. Quite possibly the PETG won't hold up to the thermal/mechanical/chemical stresses in the long run. Printing from a fiber-reinforced polyamide might be a better option.If the PETG part breaks, I'll post an update here.Let me know how it works for you.