Makita 344108-3 Spare Part - SHAFT LOCK 5903R
Makita 344108-3 — Shaft (spindle) lock, genuine Makita replacement. This small metal locking device secures the saw spindle during blade changes and maintenance so the arbor won’t rotate while you tighten or loosen the blade fixing; it’s a direct-fit replacement made to the original geometry for reliable engagement and long service life.
Specifically listed for Makita 5903R (235 mm) circular saws and found on 5903/5903R parts diagrams and spares lists, so it’s the part to look for if the blade-change lock on one of those models has worn, failed to engage, or broken.
Notes for repair: the 344108-3 is a compact metal shaft-lock component that installs into the saw’s blade-change assembly and operates as the spindle stop/push-lock used when swapping blades; it’s quick to fit with basic hand tools and restores the original locking action so you can service the tool safely. This is a genuine Makita part intended for use as a replacement in your circular saw repair, and it’s commonly listed with the alternate number 3441083 in parts lists.
If you’re ordering a single replacement to get a Makita 5903R back in service, this shaft lock is the exact part referenced on official parts diagrams and in Makita spare listings for that model. It’s one of those essential power tool parts that makes blade changes safe and accurate.
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Compatible models this part will fit:
