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.
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