Makita part 123914-7 — Gear assembly (genuine Makita) for DF012D / DF012DSE cordless 7.2 V driver‑drill (6.35 mm hex). This is the complete gear train assembly that replaces the worn or broken internal gears, bushings and related retaining hardware so the tool regains positive drive and torque control — a direct, drop‑in replacement listed as the gearbox (pos. 001) in the DF012D parts breakdown.
The assembly is supplied as a preassembled unit and, in the service diagram, is shown together with the small mating parts it interfaces with (ring / flat washers, compression spring, sleeve and a small steel ball), so you’ll typically swap the whole unit rather than attempting individual gear repairs.
Compatible models (examples): Makita DF012D and DF012DSE — listed specifically for the DF012D series cordless drill / driver. Installing the 123914-7 gear assembly restores normal transmission of the motor to the 6.35 mm hex chuck for reliable fastening and drilling.
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