... thread, shafts with gear, shafts with worm in the field of OEM 1.Material: Low/Medium Carbon Steel, Stainless Steel according ... International Standards ( SAE, DIN, NF, JIS, BS, AISI ).2.Diameter of shafts: <=30 mm3.Straightness: 0.003mm/100mm4.Surface Roughness: Ra ... , Cylindrical Grinder, Roundness Tester, Ra-testing Instrument, Projector, Runout Tester CrankShaft