... Pitch:0.4-2.5mm Length:50-100mm FR40*100 thread rolling machine, steel pipe making machine,pipe forming machineFR-40 ... .6, Automatic feeding device is optional.7, rolling shape: rolling thread, textured, ruled, rolling light, cross knurling, roll bars, rolling ... to claims if there is quality problem caused by deficient manufacturing procedure, material or technical parameter, which doesn’t match the ...