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I have a recurring problem that has been haunting me for years that i hope someone could provide a solution for - saw blade flutter on my table saw. Most woodworkers have probably experienced this at one time or another while ripping - the blade will be cutting fine and then suddenly it will "flutter" in the cut and produce a wider kerf. I've had this happen with newly sharpened blades, blades with and without stiffeners, on thick and thin wood, hard and soft wood, and even while making my initial cut on a ZCI (which pretty much defeats the purpose of making one!). I am a machinist by trade and my 3 hp cabinet saw is dialed in to within a couple of thousandths, so alignment can't be the cause. This phenomenon is driving me crazy and I'm looking for causes and solutions - please help!!!!!!!
 

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Discussion Starter · #3 ·
All of my blades are Freud full thickness - I've never owned a thin kerf blade, so that can't be the problem. This happens with a rip blade installed too…......i just don't get it!!
 

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Matt,

Just a thought; have you sent this question to both the Saw mfg and Freud? They might have insight into the issue.
 

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Have you checked the Arbor bearings? I don't think that this is the case sense you've got the saw dialed in to a couple of 0.001. I would think that if the it were the arbor bearings that your setup would be further out and not repeatable. But it might be worth a look.

cc
 

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Hi Matt

You are saying that "I've had this happen with newly sharpened blades, blades with and without stiffeners, on thick and thin wood, hard and soft wood",...I would exclude the blade as the problem and check the Arbor and/or the belts tension….it happened to me - on the drill press - that the belts are suddenly flattering and causing the chuck to flutter….

All of my blade are thin kerf and I never had this problem…

Regards
niki
 

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Are you using a blade splitter? Sometimes the harmonics get wacky when ripping stock that is binding the back side of the blade. Is this happening when you are ripping hardwoods or softwoods also? Heat buildup on the blade will cause the blade to warp and cause fluttering.
 

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Discussion Starter · #9 ·
Wacky harmonics - that sounds like my problem! Could be a heat issue or pitch buildup leading to a heat issue. My new 3 hp Jet saw has a riving knife, that, come to think about it - has reduced the occurance of this fluttering problem. But I did have it happen yesterday when I was raising the blade through a new phenolic ZCI with a newly sharpened Freud 40T combo blade. I got about 3/4" above the table when the first of several "flutterings" occurred before the blade reached full height. Now my brand new ZCI has a jagged, wide opening that doesn't match the blade width! AARRGGHHHH!!
 

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I have no advice, but wanted to comment on your profile photo of the GSP or GWP. I have a 13 year old GSP. Love of my life. Just don't tell my wife and kids. Best of luck with the blade problem.
 
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