... , 3M grinding, Ra0.005, finish14, Precision: temperature difference≤±1°C, thermal deformation≤0.01mm, concentricity≤0.001mm, straightness ... HRC55~58.2. Inner structure.3. Precision: temperature difference <= 1°C, heating transform <= 0.02mm, concentric <= 0.005mm. ... steel, alloy steel, stainless steel and others.Embossing roller, laser engravuring, 3D design and others technology.Mirror roller, Ra is ...