620229-8 supersedes older part numbers: 631919-8

Makita genuine part 620229-8 — Controller (control board) for the HM1317C / HM1317CB demolition hammer.

This printed circuit/switch assembly mounts inside the tool handle and contains the switch terminals and lead connections that regulate motor power and no‑load speed, restoring proper electronic control and on/off function.

Sold individually as an original Makita replacement for HM1317C/CB, order the 620229-8 controller when your machine exhibits loss of speed control, intermittent switching, or electrical faults in the handle assembly.