Makita 227772-4 Spare Part - HELICAL GEAR 37 HR4013C

Original Makita helical gear (part no. 227772-4) — precision-machined 37‑tooth helical gear made to fit the gearbox of Makita rotary hammers. Designed to restore smooth, low‑noise power transmission in models such as HR4013C and the DHR400 series (including DHR400ZK / DHR400ZKU). Ideal for repairing worn internals, this genuine Makita replacement part is sold as a single helical gear and gets your rotary hammer back to full function quickly with minimal fuss. Use this when you need a direct-fit, reliable component from Makita to complete your repair of critical power tool parts.

Jump straight to the Makita spare parts diagrams:

• Makita DHR400 Parts
• Makita HR4013C Parts

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