... 4-2.5mm Length:50-100mm FR40*100 thread rolling machine, steel pipe making machine,pipe forming machineFR-40*100Technical parameters: Model ... the work pieces real roundness when by rolling.2, Fixed Roll/ Pass two applied.3, Adopt Taiwanese column injection ... 5, Lower noise and durable.6, Automatic feeding device is optional.7, rolling shape: rolling thread, textured, ruled, rolling light, cross ...