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Precision Seamless Steel Tube/Pipe

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Cold Drawn Seamless Hydraulic Honed SRB Tubes

Honing is a kind of machining technology. Through honing head, the inner hole of cold drawn pipe is processed by reciprocating high-speed grinding technology, so that the inner hole can meet the requirements of tolerance size and surface roughness that we need. 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. 

Detailed Parameters

Size range: 




Available steel grade: 


SAE1020, SAE1026, SAE1045, SAE4130, SAE4140


ST52, ST52.3, ST52.4


E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470


20#, 45#, 16Mn, Q345B, Q345C, Q345D, Q345E, 25Mn, 27SiMn, 


Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boring


Delivery condition: 












Cold rolled

Cold drawn

Stress relieved





Bore treatment: Honing, skiving&roller burnishing


Bore roughness control: Ra0.25um max or Ra0, 35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes. 


End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes. 


Standard export packing: In bundles tied with steel strips. Internal & external oil coating. Plastic caps on both ends. External packing by PVC bags and knit bags. 


Customized packing and marking can be provided upon request. 


H8 tolerance: 

OD range


OD range


10< d ≤30


180< d ≤250


30< d ≤50


250< d ≤300


50< d ≤80


300< d ≤315


80< d ≤120


315< d ≤400


120< d ≤180


400< d ≤426


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. 


Application: They are widely used in wind power generation, engineering machinery, hydraulic cylinder, automotive, hydraulic shock absorption system, excavation and mining machines etc.

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