TedsWoodworking Plans and Projects

How To Diagnose Band Saw Blade Problems

large industrial band saw of carpentry with table and rollsWhen I first started out in woodworking and finally got a bandsaw, I was elated. I started having issues with the blade breaking right away though, and after quite a few blades I finally started trying to figure out what was going on.

There are a number of issues that can cause problems with your blade and your cut. Here is an extensive list of these. Hopefully you will find yours in here if you are having troubles:

1. Excessive and Premature Tooth Wear

Potential Causes:

– The size of the saw guide insert for the band is incorrect, which causes them to strike the teeth.

– The teeth are not running in the proper direction. Make sure the teeth point in the right direction.

– The new band was not broken in properly. For the first few cuts that are made, the feeding and velocity should be reduced.

– The wrong tooth was selected. Try using a finer pitch.

– Low band velocity

– The feed pressure is too light. Try increasing it.

2. Blade Vibration

– The material is not held securely

– The feed pressure needs to be increased

– The teeth are too coarse for the workpiece

– The tension of the band needs to be increased

– The band velocity needs to be increased or decreased

3. Gullets Loading

– The band is riding too heavily on the saw guide backup

– The band velocity has decreased

– The teeth are too fine for the workpiece. Try using a coarser pitch

4. Band Stalls In The Work

– The teeth are too coarse. Try using a finer tooth blade.

– The feed pressure is too high. Try decreasing the feed.

5. The Blade Breaks Prematurely

– Decrease or increase the velocity

– The blade thickness is too heavy for the speed of the machine and diameter of the wheels

6. The Blade Is Creating Belly-Shaped Cuts

– The teeth are dull

– The feed force needs to be decreased

– The teeth are too fine. Try using a coarser pitch

– The guides need to be adjusted closer to the work piece

– Increase the tension

7. Tooth Strippage

– The band velocity is too low. Try increasing the speed.

– The feed pressure is too high. Try reducing it to improve the chip curl

– The material is not held securely

– The teeth are too coarse for the workpiece

8. A Negative Camber Is Developed By The Band

– Check the alignment of the band wheel

The band is riding too heavily on the saw guide backup bearing. Adjust the band alignments on the bottom and top wheels.

9. The Blade Isn’t Running True Against The Saw Guide’s Backup Bearing

– The weld is not aligned properly. Reweld the blade so that it is true and straight.

– Check to see if the saw guide backup bearing is worn. If necessary, replace it.

– Check the band wheel alignment.

– If there is a clicking noise coming from the saw guide’s back up bearing, take the bur off of the band.

10. Too Slow Of A Cutting Rate

– Try using a coarser pitch

– Increase the feed pressure

– Increase the band velocity

11. The Blade Is Leading In The Cut

– The tooth set is damaged

– There isn’t enough band tension

Check the wear and adjustments of the rollers or saw guides

– Reduce the feed rate or pressure

12. Loss Of Set Is Premature

– Reduce the band velocity

– The width selection is incorrect. Check the chart to find the right width for the radius cutting

13. Positive Camber Is Developed By The Band

– The saw guides need to be adjusted closer to the work

– Try using a coarser pitch for increased tooth penetration

– Decrease your force

14. A Twist Develops In The Band

– The saw guides need to be adjusted further away from the workpiece

– Try decreasing the band tension

– There is binding in the cut. Try decreasing the feed pressure

– The width is wrong for the radius that is being cut. Try using a narrower blade.

– The Finished Cut Surface Is Too Rough

– Decrease the feed rate

– Increase the band velocity

– Select a finer pitch

– Tooth selection is incorrect

16. Blade Scoring (Grooving or Side Wear)

Clean or replace the guides

– Check the saw guide alignment. They should be square to the front vise

– The saw guide inserts have too much pressure on them

– Check the saw guide inserts for wear

17. Mushrooming or Burring of the Blade Back Edge

– Use a coarser pitch blade

– Reduce the feed pressure

– Check the contact between the back edge rollers and blade

– Adjust the guides and increase the tension

Make sure to let me know if the problem you are having isn’t listed here. Just contact me through the contact tab at the top of every page.

Updated: April 29, 2015 — 3:16 pm
What do you think? Please leave a comment below.
WooDesigner.net © 2015 Easy woodworking projects and plans! Frontier Theme