Makita 519378-5 Spare Part - *ROTOR ASSY DSC250

Makita 519378-5 — Rotor assembly (rotor/armature) for 18V LXT brushless angle grinders and compatible cutters. This original Makita rotor assembly is the rotating magnetic armature (shaft and laminated windings) that transfers power from the motor/stator to the gearbox — a direct replacement part labeled in Makita parts diagrams as "ROTOR ASS'Y."

Fits many Makita brushless 18V LXT grinders and related tools. Example compatible models include DGA504, DGA506 and DGA508 (and their Z/variant suffixes), and is also listed for the DSC250 steel rod cutter; some parts sellers additionally show fitment to model variants such as DGA504RMJ and DGA456.

Note on part numbering: Makita parts listings show 519378-5 alongside/with the updated catalog rotor code 510329-1, so either reference may appear on diagrams or spares lists — verify the reference in your tool’s parts breakdown to confirm exact match.

Why this part matters: replacing a worn or damaged rotor restores brushless motor performance, reduces vibration, and prevents further damage to bearings and gears. This is a genuine Makita rotor assembly intended for drop-in replacement in the listed models. Makita spare parts like this rotor are sold to get your grinder running like new again.

(Shown fitment and supersession details come from Makita parts diagrams.)

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