Genuine Makita inner ring (part no. 412073-5) — a precision‑machined hardened‑steel race labeled "Inner Ring 26" with a 26 mm bore, made as a direct‑fit replacement for Makita demolition hammers such as HM0810, HM0810T and HM0810B.
This ring provides the smooth running surface for bearing components in the hammer mechanism, restoring correct clearances, reducing play and noise, and helping the piston/striker assembly run true under heavy impact.
Simple to install as a drop‑in service part and finished to Makita tolerances, it’s the small, exact‑fit component you want when overhauling the crank/hammer assembly — like other Makita parts, it’s built to the original spec.
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