Quality Keys:
  • Roughness of internal surface: 0.2um max.
  • Tolerance of ID: H7,H8 can be satisfied.
  • Straightness: 0.5mm/1000mm max.
  • Internal surface imperfection is not allowed.
  • External surface imperfection that doesn't affect OD or W.T is allowed.
  • Hardness of internal surface should be of bigger value than that of external surface.
  • beveled ends for skived&roller burnished tubes because of the machining of tube ends before skiving&roller burnishing.