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Forum topic by woodkiller posted 1512 days ago 1238 views 0 times favorited 10 replies Add to Favorites Watch
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woodkiller

103 posts in 1564 days


1512 days ago

I am a new owner of a Jet 14” bandsaw with a riser block. I have had 2 blades that cut fine on the initial start up but the next day they will track to the back of the wheel and then come off the tire all together. One blade was 3/16” and the other was a 1/4”. The teeth of the blade are towed in, I don’t know if that is from getting too hot or what. The blades are not cheap so I don’t want to mess anymore up. Thanks for the help. Russell


10 replies so far

View ajosephg's profile

ajosephg

1850 posts in 2186 days


#1 posted 1512 days ago

I don’t use my bandsaw much, but I’d look at the guide bearing adjustment – too far back and it lets the teeth hit the guide blocks. (Upper and lower) Also, the guide assembly should be 1/8 inch or so from the top of the work piece.

-- Joe

View Howie's profile

Howie

2656 posts in 1548 days


#2 posted 1512 days ago

I would get the book out and go thru the set up procedure step by step and make sure everything is up to spec.
Another problem could be tension.
Trying to cut to tight of a radius.
Just suggestions

-- Life is good.

View richgreer's profile

richgreer

4522 posts in 1700 days


#3 posted 1512 days ago

You have to start with your wheel alignment. That is what causes the blade to track to the back. Your top wheel is tilted back. Adjust the wheel alignment until the blade is tracking in the middle.

If you are setting your tension based on the markings on the side of the saw you are probably okay in that regard. Normally, those indicators under-tension the blade which is okay for now. It’s rare that anyone over tightens a band saw blade (but I have done it – long story).

Experienced bandsaw users know how to set tension based on the feel or the sound when the pluck the blade. If it is an option, borrow or buy a tension gauge to get the true story and, in doing so, you will know how to set the tension in the future.

Once the blade is tracking in the center with reasonably good tension, set the guide bearings and/or blocks. The bearings and/or blocks should be barely touching (or almost touching) the blade but exerting no pressure on the blade.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View turkva's profile

turkva

29 posts in 2571 days


#4 posted 1512 days ago

It sounds to me like the wheels are not coplanar. They have to be aligned so the top wheel is directly in line with the lower wheel. You might need to loosen the riser block and twist the upper section in order to bring them into the same plane.

-- Accept Nothing, Challenge Everything

View woodkiller's profile

woodkiller

103 posts in 1564 days


#5 posted 1512 days ago

When I install the blade I do line the blade so it tracks properly. Then I set the guides just off the blade, and the back guide bearing is just barely touching the blade. The next day the blade tracks to the back of the wheel and when removed the teeth are towed in towards the center of the saw. The 1/2 blade that came with the saw has been fine. I am mainly use the small blades for the bandsaw boxes that I have started to make.

View FWBGBS's profile

FWBGBS

21 posts in 1865 days


#6 posted 1512 days ago

Wheels not coplanar? I think Turkva hit the nail on the head; at least that’s what I would suspect first. Here are a few bandsaw tune-up guides you might find accommodating.

Smile

-- No sane man will dance ~ Cicero

View ajosephg's profile

ajosephg

1850 posts in 2186 days


#7 posted 1512 days ago

I would think that if the wheels were not coplaner the blade would come off immediately – not the next day.

Tell us more about the teeth being towed in. Not sure what you mean.

-- Joe

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woodkiller

103 posts in 1564 days


#8 posted 1512 days ago

By being towed in I mean when the blade is removed the blade does not lay flat. If you lay the blade on the floor the flat part on bottom the blade tilts inward toward the center. This has only happens on the thinner blades that I cut curves with. Thanks for all the help.

View ajosephg's profile

ajosephg

1850 posts in 2186 days


#9 posted 1511 days ago

It’s only a guess, but maybe you’re cutting the curves too tight or too fast and stretching the (teeth side?) the blade.

-- Joe

View woodkiller's profile

woodkiller

103 posts in 1564 days


#10 posted 1511 days ago

I checked last night and the wheels are perfectly coplaner. On this model Jet you don’t even have to take the bed off to check. ajosephg I may be cutting too fast, I don’t think that I am turning too tight though. with a 1/4” blade I am still making a pretty wide sweep. If you look at the bandsaw box I posted Monday that is one that the blade messed up after I completed. Thanks again for the help.

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