Bandsaw Problem - upper wheel rocking non-functioning tracking adjustment

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Forum topic by camps764 posted 08-29-2013 02:27 AM 2605 views 0 times favorited 7 replies Add to Favorites Watch
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867 posts in 2329 days

08-29-2013 02:27 AM

Hey all.

Tonight I put my new riser block kit on my 14” bandsaw. After getting it all put together, tensioned, etc. I ran it for a few minutes. It threw the blade, so I tried to adjust the tracking.

I put the blade back on, put some tension on, and started turning the upper wheel band hand to get the tracking to adjust a little better. I noticed that the tracking was no longer doing anything, not moving the upper wheel in or out. Even under tension the upper wheel is angled in at the bottom. I can rock the upper wheel back and forth by hand, but can’t get the tracking knob to do anything.

Now I’m at a loss.

Thought I’d ask for help here before I tear anything apart.

Does this sound like a bearing issue?

The upper wheel and the back tension mechanism still move together.

Any advice/ideas are greatly appreciated.

-- Steve

7 replies so far

View Loren's profile


10280 posts in 3617 days

#1 posted 08-29-2013 02:34 AM

Tracking tilts the upper wheel. Usually it is a very simple
mechanical arrangement because the tensioned blade/
gravity pulls the wheel one way and the tracking adjustment
does nothing but limit the tilt travel.

You may need to investigate co-planarity of the wheels.
Not everybody agrees with co-planar tracking but at the
least it can be used to figure out what is going on.

View camps764's profile


867 posts in 2329 days

#2 posted 08-29-2013 02:42 AM

Thanks Loren, I always appreciate your input.

I figured it had to be a simple setup back there, but without pulled the entire upper wheel off, I can’t really see how everything is put together.

Just thinking out loud here… Could it be that I over tensioned the blade, and when it threw the blade off it pulled the upper wheel forward on the arbor screw (don’t know what it’s really called) so now the tracking screw can’t engage the back of the wheel?

-- Steve

View Loren's profile


10280 posts in 3617 days

#3 posted 08-29-2013 02:46 AM

It often butts against a lozenge shaped casting than travels
in the grooves behind the blade guard. With no tension
the casting should pivot a bit and this is magnified by
the wheel diameter to allow perhaps 3/8” of travel at
the top of the rim.

View JustJoe's profile


1554 posts in 2007 days

#4 posted 08-29-2013 02:48 AM

Hopefully you didn’t over-tension and break that upper assembly. If you broke the bottom piece that sits in front of the tracking knob, then you can turn the tracking knob from now until next year and it won’t do anything.

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View camps764's profile


867 posts in 2329 days

#5 posted 08-29-2013 02:51 AM

Loren – That is really helpful info. Will give me an idea of what I am looking at once it comes apart.

Joe – I think that may be what happened. It’s a cheap-o bandsaw to begin with – and I’ve already replaced other pieces that have shattered. The castings are pretty weak.

-- Steve

View MrUnix's profile


6609 posts in 2168 days

#6 posted 08-29-2013 03:03 AM

Sounds like you bent or broke something.. either the casting where the adjusting thumbscrew goes in, or the wheel pivot bracket that the adjusting screw pushes against. Take off the upper wheel nut and remove the wheel. You should then be able to remove the tension/pivot mechanism without taking anything else off. You didn’t say what type of saw it was, but for a stock Delta/Clone 14” BS, these are the parts involved:

The “A” shaped bracket is what does the tilting. Unfortunately, they are a weak point and frequently bend/break, particularly when using wide blades as it really can’t handle the tension required for them (even more so when a riser block is used). For a 14” band saw, a 1/2” blade is really about all it can handle, even though many state you can use up to 3/4”.


-- Brad in FL - In Dog I trust... everything else is questionable

View camps764's profile


867 posts in 2329 days

#7 posted 08-29-2013 03:08 AM

Brad – thanks for the in-depth description and parts picture! I’m guessing you’re right, that “A” bracket broke. The bandsaw is a 14” Frejoth -

Looks like this, but in blue – and considerably older

Might be a dumb question, but are those brackets pretty easy to come by since they are a source of failure?

-- Steve

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