Makita 221483-3 — Genuine Makita spur gear (listed as "SPUR GEAR 57"). Precisely identified on Makita parts diagrams as item 221483-3 (SPUR GEAR 57), this single replacement gear is the internal spur gear used in the gear housing of several Makita rotary-hammer / RH-series models.
What you get: one original Makita spur gear (221483-3), "SPUR GEAR 57" — i.e., the 57-tooth spur gear used as item 020 in the gear assembly. It’s supplied as the individual gear for direct replacement in the gearbox/gear housing.
Fits (examples): documented fit on Makita DHR171 (17 mm cordless rotary hammer), HR166D (16 mm cordless rotary hammer) and a range of RH / RH0x / XRH service model variants (RH01R1 / RH01Z / RH02R1 / RH02Z / XRH06RB / XRH06RBX / XRH06ZB, etc.). Check your tool’s exploded-parts diagram and replace the part marked 221483-3 to confirm fit.
Quick note for installation: this is a direct replacement gear intended to drop into the existing gear housing — when fitting, inspect the mating pinion, bearings and oil seal for wear and remove any debris before assembly to ensure smooth meshing and long life.
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