Portable Electric Pipe Threader Threading Machine NPT (1.8kW/110V) 1/2; 3/4; 1, 1-1/4 (P30A). Electric Threader Machine BSPT 1/2", 3/4", 1", 1.1/4". Threading Capacity: BSPT 1/2", 3/4", 1", 1.1/4".