... "WEILI"SERIES ELECTRIC THREADING MACHINES. N501.Machining range :1/2”---2’’2.Voltage :110V 220V 380V or other3.Power:750W4 ... ''-3''N1001.machining range :1/2’’---4’’2.voltage :110V 220V 380V or other3.power :750W4.rotate speed : 9 ... ,M18,M20,M24M33(round steel machine)1.machining range :10mm-33mm2.voltage :110V 220V 380V or other3.power :750W4.rotate ... M20,M24,1/2''-3/4'',1''-2'' pipe threading machine