Pre-honed tubes represent the foundational component in high-precision hydraulic systems. Manufactured from premium seamless steel tubes and subjected to sophisticated internal bore processing, these tubes deliver the exacting dimensional stability and surface characteristics required for superior hydraulic cylinder performance across diverse industrial sectors.
Material Selection
Our honed tubes are available in multiple international standard materials:
• ST52 (DIN 2391)
• E355 (EN 10305-1)
• 8732/8734 (GOST)
• 20# steel (GB/T 8163)
We additionally provide customized material solutions tailored to specific application requirements and environmental conditions.
Dimensional Specifications
Our comprehensive manufacturing capabilities accommodate extensive customization:
• Outer Diameter (OD): 20-700 mm (fully customizable)
• Wall Thickness (WT): 2-60 mm (adjustable to specification)
• Standard Length: 6 meters, with custom lengths available from 1 to 12 meters
Technical Parameters
Tolerances & Precision
• Bore dimensional accuracy: H7/H8/H9 standard, with higher precision available upon request
• Outer diameter tolerance: ±0.2mm standard (adaptable to specific standards)
• Internal surface finish: Typically Ra 0.8-3.2 μm, with finer finishes achievable for specialized applications
Surface Integrity
• Internal bore refinement: Precision ground and polished to optimal surface smoothness, eliminating burrs and ensuring seamless hydraulic operation
• Comprehensive deburring: All surfaces treated to remove protrusions, preventing potential failure initiation points
• Corrosion protection: Anti-rust oil coating and protective packaging ensure product integrity during transit and storage
Mechanical Properties
• Tensile strength: 500-600 MPa (material and specification dependent)
• Yield strength: Minimum 350 MPa
• Hardness: HB150-200 (varies according to material selection)
Industrial Applications
Our honed tubes serve as critical components in multiple sectors:
• Hydraulic systems: Primary cylinder barrels for hydraulic cylinders and actuation systems
• Heavy equipment: Core hydraulic components in excavators, forklifts, and loaders
• Automotive engineering: High-strength precision elements in suspension and braking systems
• Agricultural machinery: Hydraulic implementation systems in tractors and harvesters
• Energy infrastructure: Fluid conveyance systems in oil and gas pipelines and pumping stations
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