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Cement Board Siding
I have looked at the blades I have been using for the siding. One 10" blade is Ridgid and has every second tooth a raker as in the cement board blades. This blade has been used on the table saw to rip the board. I have cut a number of 12 ft boards down for trim. This blade is still sharp and cuts wood well.
The other blade 10" Makita is dull for cutting wood. It has no rakers and greater number of teeth. It was used on the miter side saw.
I think that both saws cut nearly the same amount of material.
I guess the rakers clear the cut material from the cut in the cement board. It must be this material that dulls the carbide blades.
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Cement Board Siding
My advice is to use 2 different blades. One for the lumber and a cheaper one for the cement board.
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Cement Board Siding
Agreed Billy;
My finding is that for longivity in cutting the cement board, the rakers make sense. The Makita blade is cutting still but requires a lot of pressure.
I looked at a 10" Marithon blade with rakers for 25$. This will last longer than than a more expensive blade.
I don't think you need an expensive blade just for the cement board only consider that you are going to use the blade only for the cement board and if the cost is the same go with something that has a raker between teeth as it will last longer.
I had been using both blades for a year before so both were not dead sharp. But if I had started with new blades I would have distroyed 100$ work of blades, for cutting wood after a couple of cuts on the cement board.
Peters
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Cement Board Siding
I use a blade with carbide tip for the hardipanel and the hardi trim. Tried using a fiber blade for the hardipanel but I found that it is very hard to cut a straight line. I just use 2 saws, 1 with carbide tip just for the hardi and one with the regular blade for the woood. Have installed more than 60 sheets on my garage, the part of my house that is not brick, and my father in laws house. The proper saw blade and a nail gun make short work of the job. I also use a small keyhole saw to clean up the 90 degree corner cuts.
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07-30-2002, 14:20 
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