Genuine Makita insulation washer — part 681650-6. This precision insulating/distancing washer mounts on the armature shaft between the rotor / fan and the brush holder to provide electrical isolation and the correct axial spacing for the motor.
Made from a heat‑resistant, electrically insulating plastic with nominal dimensions of about 30 × 30 × 7 mm, it prevents shorts and keeps the fan and armature correctly positioned.
Compatible with a range of Makita Router models including HM0860C, HM0870C, HR3210C, HR4000C, JR3070CT, so it’s the right replacement when a cracked, deformed or missing washer is causing brush arcing, grounding or play in the motor.
Supplied as the original Makita part 681650-6, this small component is a critical spare for repairs and maintenance — a straightforward part to replace when restoring motor reliability in parts for power tools.
Jump straight to the Makita spare parts diagrams:
