... Material45#Steel(GCr15) 4.Surface RoughnessRa0.1—Ra0.35 5.Straightness of Shaft60um/1000mm 6.Length1000—5000mm 7.Tolerance of ... mirror polishing of the surface, our chrome plated linear axis has the good straightness accuracy cylindricity, high hardness, wear ... machinery, the roller of printing machinery, textile machinery, the axis of transmission mechanical, all kinds of cylinder, oil cylinder and ...