Excellent Surface Roughness Ra0.3/0.4 Or Better 

Excellent Surface Roughness Ra0.3/0.4 Or Better material ST45 ST52 E355, E355R STKM13C, 27SiMn, SAE1020, C20, Q235B, CK45 Heat treatment BK + S conditions Outer diameter 50-299mm The inner diameter 40-250mm tolerance H8-H11 straightness 0.5/1000 mm Inner diameter roughness 0.2 0.4 um technology Cold drawn

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