Makita 515668-4 Spare Part - ARMATURE ASSY 240V HR2440/245

515668-4 supersedes older part numbers: 517378-9

Genuine Makita Armature Assembly — part number 515668-4. This is the rotating rotor (armature) and commutator assembly used in the motor of Makita corded SDS‑Plus hammer drills. It’s the component that converts electrical input into the drill’s rotational and impact motion; the assembly is copper‑wound on a laminated core, runs on 220–240 V variants, and includes the commutator and cooling fan so it replaces a worn or burnt rotor as a complete unit.

What’s included / key details: a balanced rotor/armature with commutator and fan blade (supplied with fitted bearings), precision shaft for direct fit into the motor housing, and copper windings for heat and power handling. The 515668-4 is the Makita factory part number used for the 220–240 V motor version. It’s sold as the single armature assembly ready to drop into the field and brush assembly.

Fits these Makita models (as listed by Makita spare‑parts distributors): HR2440, HR2440F, HR2450, HR2450F, HR2450FT, HR2450T and related HR2450 variants (also listed for HR2450X and a few compatible HR2020 references — always verify against the model on your tool’s nameplate).

Why choose this part: replacing a failed armature with the genuine Makita 515668-4 restores proper torque, reduces sparking and vibration caused by worn windings or a damaged commutator, and returns the tool to original running characteristics. It’s a direct replacement designed to fit the motor housings and brush assemblies of the listed models, making it a practical repair part when the rotor is the failed component.

Part number: 515668-4 — verified as the Makita armature/rotor assembly for the HR2440/HR2450 family.

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