Makita SPROCKET UC4020A/3520A/BUC250 - 221526-1

Genuine Makita drive sprocket (part no. 221526-1) — direct replacement sprocket for Makita electric chainsaws. It engages the saw chain on the drive shaft to restore smooth, positive chain feed when the original sprocket is worn or damaged, and is finished in hardened steel for long service life.

Fits Models : UC3020A, UC3041A, UC3520A, UC3541A, UC4020A, UC4041A and BUC250C / DUC302 / UC250D Makita electric chainsaws. Check your model’s parts list to confirm position 221526-1 matches your tool before fitting.

Key specs (for identification and fitment):

- Chain pitch: 3/8" LP (≈ 9.53 mm).

- Tooth count: 6 teeth.

- Mount/opening details: centre hole roughly 19 × 10 mm; key/oval flats measure about 11.8 mm and 8.9 mm across—use these dimensions to confirm fit on your drive shaft.

Ready to install: this original Makita sprocket is sold as the single replacement part and installs in place of the factory unit — straightforward to swap with basic tools when replacing a worn drive wheel, so your saw cuts cleanly again.

Jump straight to the Makita spare parts diagrams:

• Makita UC3020A Parts
• Makita UC3041A Parts
• Makita UC3520A Parts
• Makita UC3541A Parts
• Makita UC4020A Parts
• Makita UC4041A Parts

Browse our full range of Makita chainsaw parts.