Makita 638674-3 — Brush holder unit (brush cover) designed as a direct replacement for Makita demolition hammers HM0870C and HM0871C. This genuine Makita brush holder secures the carbon-brush assembly and spring contacts to maintain reliable electrical contact with the commutator, matching the original mounting points and electrical connections for an easy swap. The part is sold as the single brush-holder unit (fits the HM0870C / HM0871C) and is the exact Makita part number you’ll see on parts diagrams. If you’re repairing the motor assembly, this original Makita piece is the correct replacement to restore brush retention and contact performance without modifying the tool — a convenient addition to any workshop’s power tool parts stock.
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