Cold Drawn Precision Steel Tubes are high-tolerance seamless or welded steel tubes refined through cold drawing to achieve exceptional dimensional accuracy, surface finish, and mechanical consistency—ideal for hydraulic cylinders, pneumatic systems, and precision engineering applications.
Superior Dimensional Accuracy: Tight control over outer diameter (OD), inner diameter (ID), wall thickness, and concentricity ensures seamless integration into demanding assemblies without secondary machining.
Excellent Surface Finish: Internal and external surfaces exhibit Ra values as low as 0.4 µm, minimizing friction and enhancing seal longevity in dynamic applications.
Enhanced Mechanical Properties: The cold drawing process increases tensile strength and yield strength while improving fatigue resistance—critical for high-pressure hydraulic environments.
Detailed Technical Specifications
Common Grades:
Material Type: Seamless or welded, cold drawn, stress-relieved
Standard Lengths: 4,000 mm to 8,000 mm (custom lengths available upon request)
Outer Diameter Range: 20 mm to 350 mm
Inner Diameter Tolerance: Typically H8 to H9 (per ISO 286)
Diameter Tolerance (OD): ±0.05 mm to ±0.10 mm, depending on size and grade
Wall Thickness Tolerance: ±5% of nominal thickness
Surface Roughness (Internal): Ra 0.2–0.8 µm (standard); Ra ≤0.2 µm available for honed variants
Straightness: ≤0.3 mm per meter of length
Roundness: ≤0.05 mm for tubes under 100 mm OD; scaled proportionally for larger diameters
Chemical Composition (Example: CK45):
Why Partner With Us?
As a vertically integrated manufacturer specializing in hydraulic cylinder components—including Honed Tubes, Piston Rods, Hollow Piston Rods, and Hard Chrome Plated Bars—we bring decades of metallurgical expertise and process control to every Cold Drawn Precision Steel Tube we produce. Our in-house cold drawing lines, coupled with advanced straightening, deburring, and inspection systems (including laser micrometers and coordinate measuring machines), guarantee batch-to-batch repeatability. We don’t just supply tubes—we deliver engineered solutions backed by technical consultation, rapid prototyping support, and global logistics coordination. Whether you’re designing heavy-duty construction equipment or precision automation systems, our tubes form the silent backbone of your reliability.
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