Original Makita Armature Assembly — part 513791-9 — a direct replacement rotor unit for Makita demolition / hammer drills (listed for HM0870C / HM0871C.
This genuine Makita armature is built around a laminated steel core with a hardened steel shaft, precision‑machined commutator, integrated cooling fan and high‑grade copper windings with protective varnish — precision balanced to reduce vibration, sparking and brush wear and restore smooth torque and hammering action.
Suitable for the 115–127 V versions of the listed demolition hammers and supplied as the complete rotor / armature assembly (part no. 513791-9). Keep your original Makita performance by fitting this genuine Makita replacement from the Makita spare parts range.
Quick specs (for visibility)
- Part: Armature assembly (rotor) — Makita 513791-9.
- Fits: HM0870C, HM0871C
- Key features: precision-balanced laminated core, hardened steel shaft, machined commutator, integrated cooling fan, varnish‑insulated copper windings; matches original tolerances for fit and performance.
If your tool shows heavy sparking at the brushes, loss of power or visible commutator wear, replacing the armature with this original Makita unit will restore reliable operation.
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