Original Makita part 158437-6 — Spur Gear 33 (complete). This is the complete 33‑tooth spur-gear assembly used in the crank/gear train of Makita corded rotary/combination hammers; it’s supplied as the ready-to-install gear unit shown in the factory parts breakdown.
Fits Makita models such as HR3200C and HR3210C / HR3210FCT, and HR3540C / HR3541FC — a direct replacement where the parts diagrams show 158437-6 as “SPUR GEAR 33 COMPLETE.”
Why this part: it restores the primary spur gear in the crankcase to factory specification (33 teeth, supplied as the complete gear assembly), so worn or damaged teeth that cause binding, noise or loss of hammer action are corrected without having to replace surrounding housings. Install per your model’s parts diagram and crank‑housing assembly instructions.
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