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Bandsaw blade jumping

4K views 9 replies 8 participants last post by  johnstoneb 
#1 · (Edited by Moderator)
My bandsaw has taken on a strange issue. As it runs, the blade periodically jumps forward in the direction of the teeth. I'd say about every half second or so. Apart from making a raket it also is really hard to cut with, and I'm concerned there are only about five teeth actually doing any cutting.

What's weird is I really don't see anything out of alignment. All the guide bearings look rightt, blade is tracking on the wheels straight. Don't feel excessive crud build-up on the wheels.

I just don't know what else to try. Everything seems according to the book, but the problem remains.

Any ideas?
 
#7 ·
OP didn't say what size blade he was using. I think some of the wider blades are designed to do exactly what he is describing (e.g. I experience it when I use a 3/4" blade for resawing). I think the goal is to widen the kerf and give a little longer life to the blade. For finer work, I switch to a 3/8" or 1/4" blade and I don't notice it there at all. I'm not a bandsaw expert at all, just relating my personal observations.
 
#8 ·
@teejk - nothing fancy, just a regular 3/8 blade.

Several people nailed it though. I took the blade off and inspected it closer. There was a crack about 2/3 the way through. No doubt it would've popped soon.
 
#10 ·
teejk If you are experiencing the same problem you either have a bad or poor weld. the set in the teeth is there to give a wider kerf and clearance for the rest of the blade. With a good blade and proper weld you might here a little tick when the blade goes by the guides but that is all.
 
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