... Threading machine Max length of cutting -inner teeth: 30mm Max length of cutting -outer teeth: 50mm FR-50*50A-03 Hydraulic rolling machine ... work pieces real roundness when by rolling.2, Fixed Roll/ Pass two applied.3, Adopt Taiwanese column injection ... textured, ruled, rolling light, cross knurling, roll bars, rolling groove, and roll-offQuality Process Certifications: ISO 9000-2001 Quality guarantee ...