Help diagnose weird tablesaw problem

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Forum topic by Woodknack posted 07-18-2012 08:58 AM 1148 views 0 times favorited 8 replies Add to Favorites Watch
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11821 posts in 2408 days

07-18-2012 08:58 AM

Topic tags/keywords: tablesaw

Lately while using my rip blade it will seem to turn into the wood (toward the fence) every several seconds leaving shallow scars in the cut and only seems to happen while under load. I checked to make sure it was square to the table. I did not check for runout because I don’t have a dial indicator. I switched to my 60 tooth combo blade and the problem went away. Both blades are Freud Diablos. Not sure if it is the blade or something else. Seems like if the blade had warped it would be a constant issue plus the blade appears to run true best as I can judge by eye. It occurs to me that the extra teeth in the combo might be preventing the problem if it’s the saw. Or maybe the nut had loosened a smidgen and I didn’t notice. Never had this problem until recently. Any ideas?

Saw is a ~12 year old Delta contractor. Here is an old pic:

-- Rick M,

8 replies so far

View Lee Barker's profile

Lee Barker

2170 posts in 2878 days

#1 posted 07-18-2012 02:24 PM

My first suspicion: the blade is dull.

Are these thin kerf blades?



-- " his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View knotscott's profile


8057 posts in 3404 days

#2 posted 07-18-2012 02:51 PM

The fact that the problem only relates to one blade suggests that the problem is with that blade…..Lee’s suspicion is logical. Is the blade dirty by any chance?

The Diablo’s are TK’s…

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

View Fuzzy's profile


298 posts in 4016 days

#3 posted 07-18-2012 03:17 PM

I’ve had something similar happen, and it WAS the blade. A dull blade generates MUCH more heat than a sharp one … it is digging away at the piece instead of slicing through it. That’s why the burn marks appear … and … wood begins to incinerate at about 450 deg F. ... so you KNOW it’s getting pretty hot. Along with the wood getting hot, so does the blade … BUT … instead of scorching, the blade, being made of steel will warp … and it can warp a LOT. I once had a cheap plywood blade warp so bad, it looked like a potato chip. I tried to get a picture of it, but when I got the camera, it had cooled off and was as straight as an arrow !!! If your blade is warping in use … it can be grabbing the piece and pinching it against the fence … by the time you shut it down to check alignment … it can straighten back up, defying detection.

-- - dabbling in sarcasm is foolish … if you’re not proficient at it, you end up looking stupid … ... ...

View Woodknack's profile


11821 posts in 2408 days

#4 posted 07-18-2012 09:00 PM

Thanks all. The blade isn’t that old and hasn’t been burning wood so I didn’t suspect it being dull. I’ll try cleaning it and see if that helps, if not I’ll send it out for sharpening.

The Diablo’s are TK’s…

Not familiar with that acronym.

-- Rick M,

View jmos's profile


839 posts in 2397 days

#5 posted 07-18-2012 09:08 PM

Thin Kerf – TK

-- John

View patcollins's profile


1685 posts in 2893 days

#6 posted 07-18-2012 09:29 PM

Possibly you shaking or not holding a steady line? I found myself fairly shaky and have had to adjust my feed techniques to prevent such things.

View pintodeluxe's profile


5706 posts in 2841 days

#7 posted 07-18-2012 09:33 PM

Thin kerf blades will deflect more than full kerf combo blades.
I still like the thin kerf blades becuase they decrease strain on the motor.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View Woodknack's profile


11821 posts in 2408 days

#8 posted 07-18-2012 09:38 PM

Pat, that was my first thought, but since it went away after changing blades it was probably the blade.

FYI, the rip blade is regular (not thin) kerf. I just assumed all the Freud red blades were Diablos, maybe not. I think it’s the heavy duty 24T.

-- Rick M,

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