Threads 1/4 -2 pipe at 36 RPM and 2-1/2 -4 at 12 RPM. The 1224 threads a wide range of pipe including black galvanized and plastic-coated pipe together with stainless steel IMC and heavy-wall conduit as well as rod up to 30 Rockwell C. An induction motor insures sound levels well within the limits set by the regulating authorities. A special capacitor-start / capacitor-run motor allows the 1224 to thread a full range of material where voltage drop is experienced. 1/4 -2 Universal Die Head; 2-1/2 -4 receding die head allows cutting of tapered or straight NPT/NPSM or BSPT/BSPP threads. Constant and proper lubrication of dies and workpiece with through-head oiling. CSA approved. Approved to UL standards (NRTLC). Pipe Capacity: 2-1/2 (NPT) [Min] 4 (NPT). Type: Pipe Die.