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Saw blade "flutter" on my table saw

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Forum topic by MattinCincy posted 10-13-2009 06:41 PM 1641 views 0 times favorited 11 replies Add to Favorites Watch
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MattinCincy

128 posts in 1897 days


10-13-2009 06:41 PM

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!!!!!!!

-- Wag more, bark less.


11 replies so far

View bob1638's profile

bob1638

17 posts in 1893 days


#1 posted 10-13-2009 07:14 PM

“Flutter” can be caused by using a thin kerf blade as opposed to a 1/8” thick blade. Also a blade with too many teeth for ripping. Sounds like you have a well tuned saw…problem must be in the blade.

Bob

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MattinCincy

128 posts in 1897 days


#2 posted 10-13-2009 07:22 PM

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!!

-- Wag more, bark less.

View Chris 's profile

Chris

1867 posts in 2735 days


#3 posted 10-13-2009 07:26 PM

Matt,

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

-- "Everything that is great and inspiring is created by the individual who labors in freedom" -- Albert Einstein

View MattinCincy's profile

MattinCincy

128 posts in 1897 days


#4 posted 10-13-2009 07:29 PM

I’ve had it happen on more than one saw, so I don’t think that is the cause, but i might shoot an email to Freud to get their opinion – that’s a great idea! Thanks!

-- Wag more, bark less.

View ChunkyC's profile

ChunkyC

856 posts in 1998 days


#5 posted 10-13-2009 07:33 PM

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

-- Chunk's Workshop pictures: http://spadfest.rcspads.com/thumbnails.php?album=135

View niki's profile

niki

426 posts in 2824 days


#6 posted 10-13-2009 07:39 PM

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

View John Ormsby's profile

John Ormsby

1281 posts in 2481 days


#7 posted 10-13-2009 08:16 PM

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.

-- Oldworld, Fair Oaks, Ca

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MattinCincy

128 posts in 1897 days


#8 posted 10-13-2009 08:43 PM

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!!

-- Wag more, bark less.

View McLeanVA's profile

McLeanVA

465 posts in 2178 days


#9 posted 10-13-2009 08:57 PM

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.

-- Measure, cut, curse, repeat.

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MattinCincy

128 posts in 1897 days


#10 posted 10-13-2009 09:06 PM

Thanks, McLean. She’s a 12+ year old wirehaired and the love of our whole family – the best dog we’ve ever had – and I don’t know what I’d do without her.

-- Wag more, bark less.

View knotscott's profile

knotscott

5600 posts in 2120 days


#11 posted 10-13-2009 10:05 PM

Could it be runout from the arbor or flange? How are the belts?

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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