Makita ARMATURE BGA452 - 510091-8
619218-8 supersedes older part numbers: 510091-8
Original Makita armature / rotor assembly — part number 619218-8 — manufactured to the same specifications used in Makita’s 18 V cordless angle grinders. It’s the motor armature (rotor) that replaces a worn or damaged rotor and comes ready for installation to restore proper commutation and shaft drive on the grinder.
Fits Makita 18 V 115 mm (4½") cordless grinders in the BGA452 / DGA452 and BGA451 / DGA451 variants (including specific sub-models like BGA452SFE / DGA452RMJ on parts lists). This genuine Makita part is identified throughout Makita parts documentation and parts breakdowns for those models.
A direct replacement built to original Makita tolerances: precision-wound rotor laminations, factory-assembled commutator, and shaft ready to accept the original woodruff key and bearings. Keeping this single, correctly numbered item on hand makes repairing a failing motor simple — it’s a straight swap that returns the grinder to factory running condition with authentic Makita parts.
If you need a concise reference: part 619218-8 = Armature / Rotor for Makita BGA452 / DGA452 (also used in BGA451 / DGA451 ). Use this original replacement when sourcing power tool parts to restore motor function.
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Compatible models this part will fit:
