Makita 257416-2 — Ring 21 (genuine Makita retaining ring)
Description:
A small, precision-stamped Ring 21 retaining ring (Makita part no. 257416-2) that locks components in the chuck/gear area of several Makita rotary and combination hammers. It sits in the factory groove to hold the guide washer/assembly and works alongside the 7.0 mm steel ball and the conical compression spring in the tool’s front assembly, restoring correct axial alignment and smooth function.
Fitment examples:
Commonly used in models such as DHR171, DHR182 / DHR182ZJ, DHR183, HR140D, HR166D, HR1840, HR1841F, HR010G and RH01.
Why this part:
This is an original Makita replacement designed to the same spec as the original component; it’s ideal when the retaining ring is worn, deformed or missing and you need the correct fit. It’s a straightforward install in the front/gear assembly and is one of the small Makita parts that quickly fixes alignment issues. Use it when repairing rotary-hammer components or replacing worn hardware in parts for power tools.
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