Makita 310345-1 Spare Part - PISTON CYLINDER HR2300/26/261

Makita 310345-1 — Piston Cylinder (LXRH01). Precision-machined metal piston cylinder designed to restore the hammering compression and sealing surface inside compatible Makita SDS‑Plus rotary hammers; sold as the original Makita replacement for the internal piston assembly.

Typical fit examples include Makita rotary hammers such as HR2611F, HR2631F, HR2621 and many DHR242 series / LXRH01-type models — it appears on compatibility lists for roughly 30–40 Makita rotary‑hammer variants.

Simple, direct‑fit design makes this part straightforward to swap when the cylinder is scratched, scored or no longer forming a proper seal; it’s listed among Makita spare parts for rotary hammers and is intended to replace the worn cylinder without modification.

If you’re replacing internal components, this piston cylinder is a common single‑part repair to restore reliable operation — a practical choice when servicing power tool parts in affected Makita rotary hammers.

Jump straight to the Makita spare parts diagrams:

• Makita DHR242 Parts
• Makita HR2611F Parts
• Makita HR2631F Parts

Browse our full range of Makita hammer drill parts.