Original Makita 513989-8 — armature assembly (rotor) for 240 V 18 mm SDS‑plus rotary hammers. This genuine Makita rotor is listed as the ARMATURE ASS'Y 240V (item 63) in Makita parts breakdowns and is a direct fit for models HR1840 and HR1841F / HR1841FJ. The assembly includes the rotor/commutator and the internal components shown in the parts diagram (inc. items 59–65), and is intended for the 240 V motor configuration used in those 18 mm rotary hammers — ideal when you need the correct replacement part to restore motor function. If you’re sourcing Makita spare parts for a motor repair, this original Makita armature provides the correct fit and internal interfaces shown in Makita parts diagram.
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