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I don't remember who originally asked the question (this time) about cutting
Hardy board, but here in my penny's worth. I have read about diamond blades
and other circular saw blades as well as short lasting saber saw blades. I
will suggest a carbide coated saber saw blade. I have seen blades of this
design made for hack saws as well. These blades look like a standard saber
saw blade only with no teeth and covered with "lumps" of carbide material. I
used one to cut Hardy board for my heat shield. Since the blade performs as a
typical saber saw blade, corves are no problem. Additionally the cuts are
finished as-cut and require no touch-up.
Ken Mason
BJ7 in work
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