Diagnose Problems "How-To's" for all Band Saw Blades |
1. Premature and Excessive Tooth
Wear • Feed pressure too light, increase it • Lower band velocity • Improper tooth selection, use a finer pitch • Improper break-in with new band. Velocity and feeding should be reduced the first few cuts • Teeth are running the wrong direction. Be sure teeth are pointing in proper direction • Incorrect saw guide insert size for the band, allowing them to strike teeth 2. Blade Vibration • Increase or decrease band velocity • Increase tension of band • Teeth too coarse for workpiece • Increase feed pressure • Material not securely held 3. Gullets Loading • Teeth too fine for workpiece - use a coarser pitch • Decrease band velocity • Band is riding on saw guide backup bearing too heavily. 4. Band Stalls in Work • Feed pressure too great - decrease feed • Teeth too coarse, use finer tooth blade 5. Premature Blade Breakag • Thickness of blade too heavy for diameter of wheels and speed of machine • Increase or decrease velocity 6. Blade Making Belly-Shaped Cuts • Increase tension • Adjust guides closer to workpiece • Teeth too fine - use a coarse pitch • Decrease feed force • Teeth dull 7. Tooth Strippage • Teeth too coarse for workpiece • Material not securely held • Too much feed pressure - reduce for good chip curl • Band velocity too low - increase speed 8. Band Develops a Negative Camber • Band is riding on saw guide backup bearing too heavily.
Adjust band for alignment on top and bottom wheels 9. Blade Not Running True Against Saw Guide Backup Bearing • If clicking noise against saw guide back up bearing, remove burr on band • Check band wheel alignment • Check saw guide backup bearing for wear, replace if necessary • Weld not in proper alignment. Reweld blade straight and true 10. Cutting Rate Too Slow • Increase band velocity • Increase feed pressure • Use a coarser pitch 11. Blade Leading In Cut • Reduce feed pressure or rate • Check adjustments and wear of saw guides or rollers • Lack of band tension • Tooth set damage 12. Premature Loss of Set • Improper width selection - check chart for correct width for radius cutting • Reduce band velocity 13. Band Develops Positive Camber • Decrease force • Use a coarser pitch to increase tooth penetration • Adjust saw guides closer to work 14. Band Develops Twist • Wrong width for radius being cut - choose a narrower blade • Binding in cut - decrease feed pressure • Decrease band tension • Adjust saw guides further from workpiece 15. Finished Cut Surface Too Rough • Improper tooth selection - choose a finer pitch • Increase band velocity • Decrease feed rate 16. Blade Scoring (side wear or grooving) • Check for wear on saw guide inserts • Too much pressure on saw guide inserts • Check alignment of saw guides - be sure they are square to front vise. Replace or clean guides 17. Burring or Mushrooming of Blade
Back Edge • Increase tension and adjust guides • Check contact between blade and back edge rollers • Reduce feed pressure • Use coarser pitch blade
|
