Original Makita Piston — part number 416929-4 — a genuine Makita replacement piston/ram for Makita demolition hammers.

Precision‑machined, heat‑treated alloy construction built to withstand continuous high‑impact service; it transfers the tool’s drive energy into consistent blows to restore lost impact and smooth operation.

This part is commonly listed for use with the HM1202 series and related models — including HM1202, HM1202C and HM1242C — and is often shown in Makita parts breakdowns as 416929-4 (also referenced as 4169294).

Lightweight and made to Makita tolerances for correct sealing and piston travel, the 416929-4 installs as a direct-fit replacement to bring impact performance back to specification.

Available as a single genuine Makita part, 416929-4 is a practical, precision replacement when you need to repair a hammer mechanism and keep your kit stocked with essential parts for power tools.

Browse our full range of Makita hammer drill parts.