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Forum topic by mIps posted 06-12-2014 08:13 PM 547 views 0 times favorited 6 replies Add to Favorites Watch
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mIps

174 posts in 707 days


06-12-2014 08:13 PM

Topic tags/keywords: question

When I was working on my desk, I noticed that I was getting fuzzies and what I would call “tearing” on all of my cuts. I changed to a different blade of the same number of teeth, which made no difference. So I tried a blade with more and a blade with less teeth. No difference.

This is a some-what exaggerated example of what I’m talking about. It also does not seem to matter how fast or slow I cut the wood.
I do use sleds and zero-clearance inserts on my table saw so the wood should have plenty of support and backing. I have also cleaned the blades as well as I can so sap buildup should not be an issue. All blades are carbon tipped.

I’m not sure if I’m doing something wrong or what is going on.
Thanks in advance.

-- Be honest, honorable, kind, work hard, and generally be awesome.


6 replies so far

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kdc68

1979 posts in 929 days


#1 posted 06-12-2014 10:50 PM

By your description I will assume you are crosscutting these on your table saw and have a zero clearance insert in the saw.

My assumption to the problem is you are getting tear out (fuzzies) on the underside as they are being cut…

Because these table legs are round tear out (fuzzies) is occurring because there isn’t anything fully supporting the wood fibers as it passes through the blade even though you have a zero clearance insert installed. The zero clearance insert can’t support the entire underside on a round object as it is being cut.

Tear out on a table saw usually happens on the underside of the cut. A zero clearance insert helps eliminate this because the wood fibers on the underside have full support as it passes through the blade.

If your table legs were square blanks then the wood fibers on the underside would make full contact on the insert, thus tear out (fuzzies) would be minimal or nonexistent.

A possible solution would be to wrap the area to be cut with masking or painters tape. Measure and mark your cut on the tape, then make the cut. The tape will support the fibers unable to make full contact on the insert on these round table legs. Be sure to have a crosscut blade installed (50 tooth or more). This tip will help whether you use a table saw or power miter saw to make your cuts. The scenario with tear out can occur with both of these tools because of the rotation of the blade

-- Measure "at least" twice and cut once

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mIps

174 posts in 707 days


#2 posted 06-13-2014 03:03 AM

K, thanks for the reply. When I was working on my desk, all the pieces were square / flat (the picture was for clarification only), would happen on solid wood or plywood, top and bottom. The top would typically have small “divots” where the small chunk of wood would come out and the bottom would typically have the fuzzies. I can ( and did) sand off the fuzzies but the divots are harder to deal with. Next time I will try the masking tape trick, though.

-- Be honest, honorable, kind, work hard, and generally be awesome.

View Rick M.'s profile

Rick M.

3954 posts in 1032 days


#3 posted 06-13-2014 03:13 AM

Sometimes this is caused by having the blade too low, the teeth are pushing forward instead of down.

-- |Statistics show that 100% of people bitten by a snake were close to it.|

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TheFridge

822 posts in 138 days


#4 posted 06-13-2014 03:43 AM

Damn fuzzies

-- "We build our workshops. Then we enjoy the fruits of our labor by laboring for more fruits." - Me

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Yonak

276 posts in 173 days


#5 posted 06-13-2014 04:21 AM

Tearout on the top is caused by the back of the blade (upcut) when pushing the wood through following being cut by the front of the blade, often due to poor blade alignment. Does it happen only on one of the two cut pieces ? Whether it’s happening on the left or right piece indicates which direction the blade (or fence) is out of alignment.

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mIps

174 posts in 707 days


#6 posted 06-15-2014 04:18 AM

Rick, I’ll try having the blade higher.
TheFridge, I know, right?
Yonak, I’m reasonably sure the blade is square with the rip fence but may not be with my sleds. I’ll check that.

Thanks, all.

-- Be honest, honorable, kind, work hard, and generally be awesome.

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