Genuine Makita sleeve (Part No. 331596-3) — a precision metal bushing used in the hammer/bit retention area to ensure smooth, concentric movement of the piston/bit assembly.
Dimensions: sleeve ID ~12 mm, outer ~14.5 mm and height ~10 mm (d12 × 14.5, h10).
Fits and is referenced in Makita parts lists for many rotary/hollow‑hammer and demolition hammer models, including HR4001C, HR4500C, HM0860C, HM1203C and compatible BHR261 / BHR262 variants — a compact but critical wear item when servicing those tools.
Why this part matters: replacing a worn or damaged sleeve restores proper alignment of the hammer assembly, reduces bit wobble and premature wear on mating components, and helps extend the service life of your tool. Keep this genuine Makita sleeve on hand when doing repairs or ordering parts for power tools so you get the correct fit and function.
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