Genuine Makita insulation washer (part no. 681656-4) — a small insulating ring used to electrically isolate and support the armature/rotor assembly inside grinders, polishers and similar Makita motors.
This single replacement washer restores the original insulation clearances and seating that prevent rub and shorting in the motor assembly; it’s the same keyed/washer-style insulating ring shown in Makita parts diagrams for the motor/armature area.
Fits a range of Makita models, including many SJS angle grinders and polishers — examples documented to accept 681656-4 include 9564CV / 9565CVR series grinders, GA5040/GA4540 series, BO6040 polisher, PO6000C / PW5000C polishers and several PC/SG/SA models.
Supplied as a single genuine Makita part, it’s a direct replacement you can drop in during a motor rebuild or routine repair to get the tool back to safe running condition. Use this genuine Makita washer when servicing power tool parts on grinders and polishers to maintain correct insulation and fit.
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