Makita 516174-2 — Armature assembly for Makita 8406C diamond core drill. This original Makita armature is the rotating motor assembly (commutator, copper windings, laminated iron core and driven shaft with cooling fan) designed to drop straight into the motor housing of the 8406C series and restore smooth, low-spark operation.
Designed for the 240 V version of the 8406C core drill, the part number 516174-2 is a direct-fit replacement that mates with the tool’s field and carbon brushes to return torque and proper commutation; check your model plate to confirm 8406C compatibility before fitting.
If you need reliable, genuine Makita repair components, this armature is a straightforward swap — it’s one of the key Makita parts that eliminates burning, heavy sparking or loss of power when the original rotor is worn. For routine service replace carbon brushes at the same time, since they operate together as critical power tool parts.
What’s included: the assembled rotor/commutator with shaft (Makita part no. 516174-2). Installation is standard for motor armature replacement;
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