Jiangsu YingNaiSi Machine Manufacturing Co., Ltd.

E355 Precision Honed Tube Srb /Skived and Burnished Tube Pneumatic Cylinder Tube Hydraulic Honed Pipe 1. Description: Honed tube is a kind of smooth bore steel tube used to manufacture hydraulic cylinder barrels that is the core part of a piece of hydraulic cylinder. 2. Commodity: Cold drawn seamless honed tube for hydraulic cylinder 3. Size range: 40mm*30mm-580mm*500mm 4. Available steel grade: EN 10305-1 E195,E235,E355,C35E,C45E,E410,E470,S355J2,S355J2G3,25CrMo4,34CrMo4,42CrMo4 DIN 2391-2 ST37,ST44,ST52 ASTM A519 1010,1020,1026,1045,1518,1524,1541,4130,4140,4145,4340,8620 JIS STKM 13A, STKM 13B, STKM 13C GB Q345B,25Mn,16Mn,Q345D,Q345E,20#,45#,20CrMo,25CrMo,30CrMo,35CrMo,42CrMo 5. Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boring 6. Delivery condition: BK BKW BKS GBK NBK Q+T +C +LC +SR +A +N Cold rolled Cold drawn Stress relieved Annealed Normalized Quenched+Tempered 7. Bore treatment: Honing, skiving&roller burnishing 8. Bore roughness control: Ra0.25um max or Ra0, 35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes. 9. End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes. 10. Standard export packing: In bundles tied with steel strips. Int&ext oil coating. End plastic caps. External packing by PVC bags and knit bags. 11. Customized packing and marking can be provided upon request. 12. H8 tolerance: ID range Tolerance ID range Tolerance 18< d ≤30 +0/+0.033 180< d ≤250 +0/+0.072 30< d ≤50 +0/+0.039 250< d ≤300 +0/+0.081 50< d ≤80 +0/+0.046 300< d ≤315 +0/+0.081 80< d ≤120 +0/+0.054 315< d ≤400 +0/+0.089 120< d ≤180 +0/+0.063 400< d ≤500 +0/+0.097 13. Difference between honed tube and skived&roller burnished tube: In hydraulic cylinder industry, there are 2 solutions for bore treatment: Honing, and skiving&roller burnishing. Honing or skiving&roller burnishing leads to different internal surface image, but both ensure good roughness.