This serial products uses the single phase AC series motor as a power, depending on through the transmission system actuation straight-type wheel piece cutting metal tool, has reliable, the labor intensity to be low safely, the production efficiency is high, cut-off surface smooth smooth and so on merits, is suitable in exchanging 50/60Hz, rated voltage 220V/380V. Widely uses in moldings and so on circular steel pipe, shaped pipe, cast iron pipe, round steel, channel steel, angle steel, flat steel carrying on the cutting processing.