Makita RUBBER RING 13 HR3000C - 421830-0
421830-0 supersedes older part numbers: 421703-7
Original Makita rubber sealing ring — part no. 421830-0 — designated "Rubber Ring 13" and made to the same specs used in Makita hand‑held rotary hammers.
This soft, durable rubber ring fits into the tool‑holder/ cylinder assembly (sits behind the sleeve and washer in the tool‑holder area) to restore the correct seal and alignment on models such as the HR3000C.
Nominally identified as "13" in Makita’s parts list (a 13 designation used for the ring’s size in the parts breakdown), it’s the exact replacement you want when the original rubber ring is cracked, flattened, or missing.
If you maintain Makita tools, keeping a genuine Makita replacement like this on hand makes a fast repair straightforward — it’s a small part but essential for reliable hammer action and dust/oil sealing. Makita parts like this one are referenced directly in the HR3000C parts diagrams.
Jump straight to the Makita spare parts diagrams:
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Compatible models this part will fit:
