... of cutting -outer teeth: 50mm FR-50*50A-03 Hydraulic rolling machine, Automatic pipe threading machineMax length of cutting -inner teeth30mmMax ... Threaded Rolling Machines:1, Specialized for metal tubes designing, use triangle support, it can guarantee the work pieces real roundness ... system used the electric pump, change manual lubricating pump, use the Japanese bearing.5, Lower noise and durable.6, ...