All Unitec saw blades cut on backward stroke.
Two qualities: 1 - HSS for steel up to 600 N/mm 2 strength (carbon steel, etc.) HSS-SL for high strength steel (stainless steel)
Length of blade = Operating length + 5-1/4 inches. (Ex.: To cut a 10" diameter pipe use a blade with a minimum length of 16 inches.)
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