Key Advantages of Our Seamless Honed Tube
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Ultra-High Precision
Inner diameter tolerance H7/H8, ovality ≤ 0.01mm, straightness up to 1–1.2mm/1000mm, ensuring perfect fit for high-speed reciprocating and high-pressure working conditions.
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Mirror Inner Surface
Inner roughness Ra 0.08–0.4μm, with uniform cross-hatch pattern, reducing fluid resistance and seal wear, improving system efficiency by 5%–15%, and preventing oil or air leakage.
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High Pressure & Wear Resistance
No oxide layer, no cracks on inner/outer walls. Honing creates a work-hardened layer and compressive stress, improving fatigue strength by about 30% and extending service life.
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Excellent Mechanical Properties
Available in 20#, 45#, 40Cr, 16Mn, 27SiMn, ST52/E355, 304/316 stainless steel. Supports bending, flaring, flattening without deformation, suitable for harsh environments.
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Ready for Assembly
Finished inner hole quality eliminates secondary machining, saving production time and cost.
Specifications & Customization
- Materials: 20#, 45#, 40Cr, 16Mn, 27SiMn, STKM13C, ST52, 304, 316
- ID Range: Φ20mm – Φ800mm (customizable)
- Wall Thickness: 2mm – 50mm
- Length: 6m, 9m, 12m, fixed length available
- Precision: H7/H8, Ra 0.08–0.4μm, straightness 1mm/1000mm
- Standards: GB/T 3639, ASTM A519, DIN 2391, ISO 9001
Main Applications
- Hydraulic & Pneumatic: Hydraulic cylinder barrels, air cylinders, power unit pipes
- Construction Machinery: Excavators, loaders, cranes, road rollers
- Automotive & Rail: Shock absorber cylinders, steering cylinders
- Petrochemical: High-pressure fluid pipes, anti-corrosion honed pipelines
- Precision Machinery: CNC machine tool shafts, injection molding machine parts
- Energy Equipment: Wind turbine cylinders, hydraulic support columns
Why Choose Us?
- Factory Direct Sales with large stock and competitive prices.
- Full Inspection: chemical composition, mechanical properties, size, roughness, straightness tested piece by piece.
- Fast Customization: accept drawings for special size, length, material and surface treatment (chrome plating, roller burnishing).
- Quick Delivery: stock items ship in 48 hours; custom orders 7–15 days.
- Technical Support for material selection and application matching.
FAQ
Q: What is the difference between honed tube, seamless pipe and burnished tube?
A: Honed tube has higher precision and better roundness, ideal for long-term seal friction – the best choice for hydraulic cylinders.
Q: How to choose material?
A: Low pressure: 20# / 45#; Medium-high pressure: 40Cr / 27SiMn; Corrosive environment: 304 / 316.
Q: Do you supply samples and small orders?
A: Yes, we support sample orders, small-batch trials and cut-to-length service.
