Kerf cheat sheet
Kerf is the width of material the cut removes. SmartNest offsets every toolpath by half the kerf so finished parts come out to size. Typical starting values:
| Process | Thin (under 1/4″) | Medium (1/4″ to 1/2″) | Thick (over 1/2″) |
|---|---|---|---|
| Plasma | 0.045″ | 0.060″ | 0.090″ |
| Laser | 0.008″ | 0.014″ | 0.025″ |
| Waterjet | 0.030″ | 0.035″ | 0.045″ |
| Router | bit dia | bit dia | bit dia |
Always test on scrap. These are starting points. Your amperage, nozzle, pressure, and material grade move the real number. Cut a test coupon, measure, and save the result back to the profile.