High capacity and heavy-duty power. The Model 1224 Hammer Chuck Threading Machine works on a wide-variety of pipe materials and sizes — from 1/2 to 4-inch diameter steel, stainless, plastic-coated and galvanized pipe and conduit — for the ultimate in performance. 230V 1-1/2 HP engine features a two-speed gearbox that lets you customize the RPMs to the size pipe you’re threading for more control.