Original Makita 325813-1 — “Ring 21” replacement retaining ring for Makita 26 mm rotary/combination hammers.
A precision 21 mm ring (listed as RING 21 on Makita parts diagrams) that fits into the tool‑holder/chuck area (shown as item 3 in the parts breakdown). Supplied as a single genuine Makita ring to restore the same fit and retention in the chuck/drive flange assembly.
Example Makita models this part is shown to fit include HR2631F, HR2630, HR2621, M8701 and HR2651 — refer to the corresponding Makita parts diagrams for placement and quantity.
If your rotary/combination hammer is showing play or the bit retention is failing, replacing the 325813-1 ring restores the original retention geometry without modification.
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