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Originally Posted by jaydee
Main problem with slit saws is any little vibration or imbalance will make the channels wider than the width of the blade. Thay can become out of balance a lot easier than end mills especially if ran hot. Probably not the case here though. That much of a change was probably some other issue. Still shouldn't change the results that much though.
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Very true, especially with High-Speed Steel slitting saws. Also number of teeth makes a big difference as well. If number of teeth on the saw is too much (ie above 20 for the saws that we use) then you'll have problems... teeth of HSS saws got easily broken too.
So we use Solid Carbide wheel cutters. The trick with solid carbide is speed should be approximately 50% greater than HSS.