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Band saw wobble

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Forum topic by Johnnyv99 posted 06-17-2019 05:05 PM 252 views 0 times favorited 4 replies Add to Favorites Watch
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Johnnyv99

11 posts in 1867 days


06-17-2019 05:05 PM

I have a 4 year old Powermatic 14 inch band saw. I have a 1/2 inch blade that is tightened to as tight as I feel it should be. There is very little flex in the blade (I have it a little tighter than what Alex Snodgras recommends). Also it tighter than the 1/2 inch indicator on the BS. The BS has what I consider more wobble than it should. The Carter bearings are difficult to set correctly if at all because of this.
The tires have embedded saw dust in them that I haven’t been able to clean off. Will this cause wobble? Do I need to change the tires? Thank you all for any responses.

-- When the people fear the government, that's Tyranny. When the government fears the people, that's Liberty.


4 replies so far

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splintergroup

2907 posts in 1728 days


#1 posted 06-18-2019 09:26 PM

First off, the indicators used on these saws depend on a fresh spring and a blade of the specified thickness and steel composition to reflect the actual tension with any hint of accuracy. Consider the built in indicators only a hint that the blade (usually) needs to be tighter 8^)

By saying “The BS has what I consider more wobble than it should.” do you mean the saw is wobbling (out of balance) or the blade is drifting back/forth?

If a balance issue, is your wobble only when the saw is running and if so, does it still wobble if powered up with out the blade installed? Obviously if so, there is something off with the wheel/motor balance.

If you blade is actually moving (usually back and forth versus side to side), it may be a bad weld or your tires are flat spotted. You can usually clean dust from the tires by spinning the wheels by hand and placing a scraper against the tires. Just dust should no cause any problems. Do you detect any out-of-round or bent wheel conditions while doing this?

Basically you start with out a blade installed. Power the saw and check for vibration and wobble on the lower (driven) wheel. Spin the top wheel by hand and look for the same. Check the tires for flat spots, deterioration, and general crustiness (should be ok for a 4YO saw).
Install the blade, tension and set the wheel pitch so the blade is riding on the crown (usually in the center of the tire). Problems at this point usually indicate a bad blade. Install a different one and see if the problem persists.

View Lazyman's profile

Lazyman

3925 posts in 1893 days


#2 posted 06-18-2019 09:55 PM

Do you possibly mean flutter instead of wobble? Try adjusting the tension up or down with the bandsaw running but without the guides engaged until the flutter goes away.

Check to make sure that the blade and wheels are clean and kink free. A bad weld or kink will often result in a regular tapping sound that repeats with each revolution of the blade.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View HokieKen's profile

HokieKen

10875 posts in 1644 days


#3 posted 06-19-2019 02:34 PM

Wouldn’t be a Timberwolf blade by chance, would it? If so, try backing off the tension. They are made to be used with less tension.

Aside from that, check wheels for being bent or out of balance and try a different blade. There’s a very good chance it’s just a crappy blade weld.

-- Kenny, SW VA, Go Hokies!!!

View Steve's profile

Steve

1578 posts in 1088 days


#4 posted 06-19-2019 02:57 PM

Have you tried a different blade to see if you get the same wobble? I’d try the following:

1. Cleaning the tires off of any gunk and making sure they are sitting flat on the wheels use the same blade.
2. Try a new blade
3. Check the motor belt for any issues. Possibly try a link belt

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