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I have a Jet 10" Bandsaw. I have always had problems with the blade coming off if I back the cut wood out. I got a new blade and adjusted the 6 rollers that control the blade. I backed all 6 off so they did not touch and adjusted the tracking so the blade, 1/4" 6 TPI, so it was lined up in the center of both the top and bottom wheels.

I checked to see if the blade was square to the table in the direction the table tilts and that was fine. However the blade is not square at the back of the blade to the table. This is with the thrust bearings backed off all the way and the belt tracking properly in the middle of the tires.



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So the only adjustment for this is the table tilt which is square. The trunion seems to be the only option to adjust this would be to shim the top of the trunion to get the blade square to the table. Have you ever had this problem and do you think this is the answer.

This is a picture of the trunion under the table.

The yellow circle is where I think it should be shimmed.

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So what is your opinion.
 

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Both guides must be adjusted to fit the blade. Some band saws allow you to change the tilt of the top wheel SLIGHTLY to keep the blade from from walking off the tire. How old are the tires on the saw? Do they need replacing? Frustrating problem. The blade's weld might be a problem, but that is really unlikely, especially if it happens with every blade.

I had this problem with a 14 inch Delta, but it was because I fiddled with the top wheel tilt. Took some time to set it back correctly. I made a small adjustment (half a turn of the bolt at a time), then manually rotated the wheel with blade until it stopped "walking" off the tire. NEVER, EVER try to adjust the bottom wheel, it is set with a huge jig and must be exactly as set. Once the top is set, don't mess with it.

Here's a video on adjusting tracking. Larger saw, but it applies to all band saws.
 
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