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Thread: band saw vibration

  1. #1
    Registered User David Houchens's Avatar
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    Default band saw vibration

    I have an 18" Jet bandsaw which I've been very happy with for years. Over the past several months I've been noticing a vibration like something is unbalanced. I cleaned it out of all the dust, wiped off the wheels and checked the tires. Still there. Doesn't seem to be there at start-up until the rpm's get up, or when the rpm's slow down after its turned off.
    Any thoughts before I tear it down to check the bearings would be much appreciated.
    Thanks

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  3. #2
    Registered User David Houchens's Avatar
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    Default Re: band saw vibration

    Also I don't hear any bearing noise.

  4. #3
    Registered User sunburst's Avatar
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    Default Re: band saw vibration

    Is it a fast vibration like a resonance or is it more like a wheel out of balance? Have you changed the blade and is it still there?

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    Default Re: band saw vibration

    Have you changed blades since this started? Checked all connections/ bolts/ screws? I have a 20" Snowflake that makes a horrendous harmonic vibration as it comes up to speed, even though it passes the nickel test. Then it's silent. And it doesn't make it when it slows down, so I figure it's a torque issue, some twisting somewhere. And nothing to worry about. Also, with yours, does it sound like it's vibrating or can you feel it? I'd also pull the blade off and see if it goes away. That would help isolate or eliminate stuff.

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    Default Re: band saw vibration

    Jeez, John. We were typing at the same time and thinking the same thing!

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  10. #6
    Mandolin & Mandola maker
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    Default Re: band saw vibration

    I had a similar problem that was driving me crazy, tried everything. Eventually traced it to the blade was not quite perfectly centred on the wheels. Just a mm or so out was enough to cause the vibration, does not take much. Had been working perfectly for years and I had not touched the adjustment.
    Peter Coombe - mandolins, mandolas and guitars
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  12. #7

    Default Re: band saw vibration

    Could be a belt, too. Can you feel a "land" in the belt when you rotate it by hand? If so, a new belt or one of those link-belts might solve it. Hopefully it's just a wonky blade.

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  14. #8

    Default Re: band saw vibration

    I had a vibration on my Jet that ended up being the tire on drive wheel that was old and lost a couple hunks on inside edge..they weren't noticeable with blade on ..but could feel them with blade off..

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  16. #9
    Mandolin Dreams Unlimited MysTiK PiKn's Avatar
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    Default Re: band saw vibration

    I don't know bandsaws; but a belt problem can also be a pulley problem. Wear, tension, or guides on a belt. Wear, grooving edge of pulley, Intact belt can be one side worn, with pulley worn. Belt guides if any. Stretched belt.
    good luck.

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  18. #10
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    Default Re: band saw vibration

    Switching to a poly link belt can be a real vibration reducer too.
    Steve



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  20. #11
    Registered User David Houchens's Avatar
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    Default Re: band saw vibration

    It shakes the table noticeably. Seems it did it with the last blade but my memory is questionable. I will try it with the blade off, since this is my last one here. The belt was loser than I would have liked so I thought I'd found it but tightening didn't help. I'll look at the belt and pulleys as well. Thanks for the input. Some days the ol grey matter needs a good shaking.

  21. #12
    Mandolin Dreams Unlimited MysTiK PiKn's Avatar
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    Default Re: band saw vibration

    shakes table? something bent, out of balance.

    Bent shaft? , play in bearing,

    play in pulley shaft.

    Sometimes if you have a manual, it will outline troubleshoots.

    = The Loar, LM700VS c.2013 = "The Brat"
    = G. Puglisi, "Roma" c.1907 = "Patentato" - rare archBack, canted top, oval
    = Harmony, Monterrey c.1969 = collapsed ply - parts, testing, training, firewood.


    "The intellect is a boring load of crawp. Aye. Next wee chune".

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    Default Re: band saw vibration

    So off topic slightly, could one use a scroll saw for such applications?

  23. #14
    Registered User sunburst's Avatar
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    Default Re: band saw vibration

    Quote Originally Posted by TheOne-N-OnlyHomer View Post
    So off topic slightly, could one use a scroll saw for such applications?
    A few of them. Scroll saws are much slower, have less capacity and less power, so they aren't suited for many of the heavier tasks for which we use bandsaws.

  24. #15
    Registered User j. condino's Avatar
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    Default Re: band saw vibration

    I run my 30" Yates snowflake with a vfd primarily for power conversion, but one of the great benefits is that I can vary the speed to bypass any minor vibrations that come up at certain frequencies. I had an old Delta saw that had a vibration that gradually got worse and it wound up being the key that held in the rear pulley was coming loose.

    Notice the responses- John, Dale, and I all have giant old Yates bandsaws. Ditch the Jet and come on over to the darkside and you'll never regret it!

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  25. #16
    working for the mando.... Bluetickhound's Avatar
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    Default Re: band saw vibration

    Wow! How much does one of those behemoths weigh??
    "A creative man is driven by the the desire to achieve, not by the desire to beat others."

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  26. #17
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    Default Re: band saw vibration

    Somewhere I've posted a picture of my 20" on the cafe. I can't figure out how to find the image right now. James has a 30". Much heavier. I'll bet mine weighs 800 lbs, but I've never weighed it. It may weigh more. I know you need a forklift to move mine. I think John's may be even heavier. This old industrial machinery isn't for everyone. But the stuff is pretty good quality. My bandsaw was made pre-WWII. It has aluminum wheel covers. After the war started, all aluminum went to airplanes and such. My jointer is from 1918. It just sits there and purrs. It will also hurt you and not notice.

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  28. #18

    Default Re: band saw vibration

    The new Grizzly 17", 19", 21", and 24" saws are really beautiful. They range from $1300 - 3000. I've bought a few of them for various shops. Blade change with the flip of a lever and so rigid and nicely made no bearing realignment or wheel re-tracking is necessary as long as it's a new blade of the same spec. I used to work in a shop with an old Oliver 30", but I'd never want one of the old American ones over one of the new Grizzlies -- other than aesthetics and wow factor, which of course are unparalleled in those old works of art.

  29. #19
    Registered User sunburst's Avatar
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    Default Re: band saw vibration

    Quote Originally Posted by Marty Jacobson View Post
    I'd never want one of the old American ones over one of the new Grizzlies...
    I find that interesting, considering mine was well under $1000, can do everything from resawing over 12" widths to cutting tiny details. There's far more to this saw than aesthetics and wow factor.
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  30. #20

    Default Re: band saw vibration

    Well, yeah, mass is good, until you have to move it. Stiffness is critical, too. If I can get similar stiffness and lower mass, I'm all for it. These Grizzly saws are adequately stiff, and reasonably light for the jobs they can accomplish. Even for cutting steel, which we do regularly.

  31. #21

    Default Re: band saw vibration

    I also have a 18" Jet. Recently I started to have a vibration issue. The tires aren't glued and while it appeared visually to be fine I think it must have stretched some over time. Replacing the tires corrected the problem.

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  33. #22
    Registered User sunburst's Avatar
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    Default Re: band saw vibration

    Quote Originally Posted by Marty Jacobson View Post
    ...mass is good, until you have to move it...
    No big deal, just need the right equipment. Mine is in a shipping container "as we speak", strapped in and ready for a 400 mile truck ride. I wouldn't think of leaving it behind!

  34. #23
    Registered User David Houchens's Avatar
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    Default Re: band saw vibration

    James, I'd love one but too many things on the list ahead of it. Those big saws would go through the floor of my shop. Thats why my milling machine is in another shop at my folks home. First what I'd like is a new shop. Some day maybe when money is flowing better.
    Barney, I'll give the tires a real good look. If I can't find anything else wrong, I'll just order them and see. The urethane tires run from around $40 - $60. Not to bad for the time they last.

  35. #24
    working for the mando.... Bluetickhound's Avatar
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    Default Re: band saw vibration

    Yeah, I'd love to have one of those old saws but I'm working out of a cramped garage right now and will be building (read:having a prefab building installed... lulz!!) a workshop in the backyard soon. The flooring wouldn't support something like that. The folks at Highland Hardware in Atlanta are about to be making a ton of money off of me in the next month or so. With some room to put stuff I have a laundry list of machines I'd like to upgrade, most notably my Rikon 10" saw... (The 14" pro model will be a welcome upgrade), an honest to goodness jointer, and a quality drill press are on the list along with dust collection equipment.

    Yeah.... I'm hooked.
    "A creative man is driven by the the desire to achieve, not by the desire to beat others."

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  36. #25
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    Default Re: band saw vibration

    I also had a Pac-Rim bandsaw (Ryobi 14") that I was very unhappy with. It was built so lightly that I couldn't get it into balance; it shuddered and screamed and wobbled and wandered. I replaced it with a 1940's Delta 14" for $200. What a difference. It runs smoothly, is easy to set up, stays set up, tracks very well while resawing, and is just plain a pleasure to use. I learned that the older American tools are very much worth looking into. They often need only a bit of cleaning and some bearings. Anyways, I'm cheap, and I'm drawn toward cheap solutions.
    Steve



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