... of hardening layer0.8—3mm 3.Material45#Steel(GCr15) 4.Surface RoughnessRa0.1—Ra0.35 5.Straightness of Shaft60um/1000mm ... packaging machinery, the roller of printing machinery, textile machinery, the axis of transmission mechanical, all kinds of cylinder, oil cylinder and ... made according to the requirements of customers. Specifications are from Φ 4-Φ 50 mm, length is within 6 m. We undertake various ...