Bandsaw blade jumping

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Forum topic by totalrewind posted 04-18-2014 03:58 PM 1067 views 0 times favorited 9 replies Add to Favorites Watch
View totalrewind's profile


22 posts in 1694 days

04-18-2014 03:58 PM

Topic tags/keywords: question bandsaw

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?

9 replies so far

View MrRon's profile


3892 posts in 2665 days

#1 posted 04-18-2014 04:11 PM

Sounds like the blade was not welded correctly. The two ends of the blade at the joint are not aligned. If it is indeed the blade, it will cause damage to the guides.

View mikeevens45's profile


68 posts in 998 days

#2 posted 04-18-2014 04:11 PM

blade kinked? roll blade around by hand and look at the side view…or rear guide bearing is locking up

-- as technology progresses, wood workers seem to regress...all my power tools and my favorite is a chisel and a hand plane

View distrbd's profile


2220 posts in 1868 days

#3 posted 04-18-2014 04:17 PM

Kinked blade +1,unless it’s a new blade you just put on ,if so Mr Ron is right,there’s no mystery with bandsaw most of the time.
change the blade .

-- Ken from Ontario, Canada

View Surfside's profile


3389 posts in 1595 days

#4 posted 04-18-2014 08:53 PM

Missing tooth ? Get a replacement.

-- "someone has to be wounded for others to be saved, someone has to sacrifice for others to feel happiness, someone has to die so others could live"

View johnstoneb's profile


2105 posts in 1594 days

#5 posted 04-18-2014 10:47 PM

x1 MrRon Sound like a problem with the weld. Change the blade.

-- Bruce, Boise, ID

View teejk's profile


1215 posts in 2106 days

#6 posted 04-18-2014 11:00 PM

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.

View totalrewind's profile


22 posts in 1694 days

#7 posted 04-21-2014 04:59 PM

@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.

View mramseyISU's profile


406 posts in 967 days

#8 posted 04-21-2014 09:13 PM

I was just going to say it sounds like a cracked band right before it breaks.

-- Trust me I'm an engineer.

View johnstoneb's profile


2105 posts in 1594 days

#9 posted 04-22-2014 12:56 PM

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.

-- Bruce, Boise, ID

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