The STIHL 1125 007 1021 Spur Gear is a genuine OEM component used in the chain tensioning system of many STIHL chainsaws. This precision gear engages with the chain adjuster screw to move the guide bar forward or backward, allowing accurate chain tension adjustment.
When the spur gear becomes worn or stripped, the chain adjuster may slip or fail to move the bar properly. Replacing this component restores smooth, precise chain adjustment and ensures correct chain tension for safe and efficient cutting performance.
Compatible STIHL Models
Chainsaws
- STIHL 024 / 024 S
- STIHL 026
- STIHL 028
- STIHL 034
- STIHL 036
- STIHL 044
- STIHL 046
- STIHL 064
STIHL MS Series
- STIHL MS 260
- STIHL MS 261
- STIHL MS 270
- STIHL MS 280
- STIHL MS 340
- STIHL MS 341
- STIHL MS 360
- STIHL MS 361
- STIHL MS 362
- STIHL MS 380
- STIHL MS 381
- STIHL MS 440
- STIHL MS 441
- STIHL MS 460
- STIHL MS 640
- STIHL MS 650
- STIHL MS 660
