419566-3 supersedes older part numbers: 418769-6
Genuine Makita Switch Knob — Part 419566-3. A molded plastic on/off switch button designed to snap into the power-tool switch lever and provide smooth start/stop and lock‑on control for grinders and similar tools.
This part is the exterior switch button (switch knob) used on several Makita grinders and related tools; it’s finished in durable molded plastic and engages the internal switch / lever assembly for reliable operation. Replacement of the broken or worn knob is straightforward and typically quick if you remove the rear housing and slide the lever into place.
Example models that use part 419566-3 include (but are not limited to) Makita 9553NB, 9554NB, 9555NB, 9557NB, 9558HN, 9556HN, GA4030, GA4530 and BGA452 series grinders — verify your tool’s parts diagram to confirm exact fit.
Notes: this part replaces the earlier 418769‑6 reference on some diagrams, and is listed in Makita parts diagrams for compatible grinders. If your switch button is cracked, worn or missing, this genuine Makita replacement will restore proper engagement with the switch lever so the tool powers on and locks as intended. Buy this genuine Makita switch knob from Makita spare parts to get your grinder back to work.
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