6 common errors
- Wrong file diameter (must match chain pitch)
- Wrong attack angle (30° standard)
- Wrong file height (upper 1/5 of tooth)
- Uneven tooth length (saw will drift)
- Forgetting depth gauges (re-set every 3 sharpenings)
- Filing in both directions (file works only on push)
Use a file holder with guide (12-20€) — pays back in saved chains.
Ask the AI mechanic — share your saw and chain reference, the AI returns exact file diameter and angle.




