Makita 418349-8 Spare Part - PISTON HM0860C
Original Makita piston, part number 418349-8 — a precision replacement piston designed for Makita SDS‑max demolition/hammer drills. This component restores the hammering action inside the crankcase assembly and is sold as the single piston piece used to replace worn or damaged pistons in affected models.
Compatible with Makita HM0860C, HM0870C and HM0871C demolition hammers; some parts lists also show fitment to earlier/related models such as HM0830, HM0830T, HM060C and HM001G — check your machine’s parts diagram or model label to confirm.
Small and lightweight for easy handling — listed unit weight about 12 g — the 418349-8 is an original Makita spare engineered to the same fit and tolerances as the factory-installed piston, so it drops into the crankcase/connecting-rod assembly as the correct replacement. This is a commonly requested item among power tool parts for demolition-hammer repairs.
If your hammer is losing impact or the piston shows scoring or wear, replacing it with part 418349-8 will return proper piston-to-cylinder clearance and help restore impact performance.
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Compatible models this part will fit:
