Reply by CaptainKlutz

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Posted on Oscillating Flutter?? Grizzly G0513ANV 17" Bandsaw

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3601 posts in 2346 days

#1 posted 04-17-2018 05:44 AM

More tension makes it worse = problem.

My 1st guess is upper/lower wheel misalignment?
My 2nd guess is bent wheel, or tire issue?

Have no experience with Grizzly 17”, but have seen blade ‘flutter’ issues on both a Delta clone 14” and vintage 20” band saw? Even after installing new urethane tires, and balancing the wheels (which helped some); real culprit ended up being misalignment between upper and lower wheels. They need to be in same vertical plane to each other, or tension stress creates sort a figure 8 oscillation in wheel position.

It is easy to check:
Open covers and watch wheels/tires with motor running: not looking for vibration, look for movement: they should not have any major out of plane movement under power. IE. almost no side to side or in/out movement. Blade should in about same position on both wheels also.

If you see movement:
1st check for bent wheel: remove blade, spin wheels while holding pencil in fixed position against the side (maybe use dust brush as pencil rest): is the wheel running true or is there a wobble?
Wobble? – Call Grizzy and discuss problem; likely need a new wheel or new bearing.

2nd check condition of tires.
Should be centered on wheel, no flat spots in circumference, no lumps with smooth surface, maybe slight crown in middle (helps tracking) or dead flat side to side.

3rd check for upper/lower wheel alignment:
Aligning wheels is not hard, but can be a pain; as you typically have to tear saw down pretty far to use straight edge. That or you need to make some custom co-planar gauge blocks. Most of the newer band saw manuals I have seen show how to align wheels.

Best Luck.

-- If it wasn't for bad luck, I wouldn't have no luck at all, - Albert King - Born Under a Bad Sign released 1967

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