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Reply by RClark

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Posted on What table saw blade or bit do you recommend

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RClark

124 posts in 3260 days


#1 posted 02-26-2021 12:44 AM


Second, the Amazon listing has a drawing of the grind specifications. That drawing shows a .006” difference between the top of the flat tooth and the top of the beveled tooth AND the beveled tooth is higher than the flat grind tooth. Here s a snip:

- RClark

That s going to give you clean, sharp corners. It s still going to be flat. Dado stacks cut the same way.

- Rich

Well…I don’t own any CMT saw blades, so I went out and looked at my Freud blades that have a similar configuration. I wanted to check the advice I gave; I’d hate to to prompt somebody to act on something that is false. I realize it may not be an apples-to-apples comparison, but I’m going to have to stick with what I said: I don’t think the CMT blades linked will cut flat bottoms.

Here’s what I found on my Freud blades. My standard blades right now are Freud LU83 50T thin-kerf combo blades. They have alternating top bevel grinds. Every fifth tooth is a flat top tooth just like the referenced CMTs. I have three of them.

From Freud’s web site the blade spec is:

The site doesn’t give any information about the difference in height of the flat top tooth compared to the beveled tooth, unlike the info on the CMT. The Freud site also does not claim that the LU83 will cut flat bottoms.

I ran a piece of maple scrap through two of the Freud blades. The bottoms are not flat. Pic:

Full disclosure: My Freud blades are not new; they have been resharpened by the place that does all of my sharpening; they service many industrial customers of all sorts and I trust they did it right. I suppose it’s possible that they modified the grind in some way that “took away” the ability for my blades to cut flat bottoms.

I still can’t say whether or not those CMT will cut flat bottoms. But, based on what I saw in their literature, I don’t THINK they will.

Hopefully somebody who has one of the CMT blades can confirm one way or the other.

-- Ray


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