External Diameter Accuracy : f8
Surface Roughness : max Ra 0.2μm
Hard Chrome Thickness : <Φ22.225mm: min 15 μm
≧Φ24mm: min 20 μm
Surface Hardness: HRC 55° ± 2°
Hardened depth : 0.5mm – 1.5mm
Middle frequency hardened depth : 3mm-5mm
Straightness : <Φ20mm: max 0.25/1000mm
≧Φ20mm : max 0.2/1000mm
Roundness : tolerance × 1/2
Standard Length : 2M - 6M
Standard Size : Φ6 ~ Φ255 (Φ1/4” ~ Φ10”)
Steel Grade : JIS S45C, S55C, SAE1045, DIN CK45, JIS SCM440, other specification can be supplied upon request.