EAST AI Hydraulic Manufacturer
Since 2006
Since 2006
ST52 steel grade delivers excellent yield strength and tensile properties for demanding hydraulic applications.
Honing or skived & roller burnished processes guarantee low roughness (Ra ≤ 0.2–0.4 μm), extending cylinder seal life.
Bore tolerances are strictly controlled, ensuring seamless piston rod movement.
Smooth internal bore improves efficiency and minimizes wear.
Available with optional protective coatings or plating for extended service in harsh environments.
Supplied in various inner diameters, wall thicknesses, and lengths to meet different project requirements.
Trusted by global OEMs and cylinder manufacturers for consistent performance.
To achieve its high-quality finish and performance, the ST52 Honed Tube undergoes a precise and controlled production process:
High-grade ST52 seamless steel tubes are sourced to ensure consistency and mechanical strength.
The tubes are drawn or rolled to refine grain structure, enhance dimensional accuracy, and improve surface quality.
Normalizing or stress relieving improves toughness and eliminates internal stresses.
The inner diameter is rough-machined to remove defects and prepare for precision finishing.
Final machining ensures exact dimensional tolerances and mirror-like surface finish.
Tubes are cleaned thoroughly to remove oil, dust, and metal residues.
Dimensional checks, surface roughness measurement, hardness, and pressure testing guarantee product compliance.
Each tube is carefully packed with protective end caps, anti-rust oil, and seaworthy packaging for global delivery.
The ST52 Honed Tube is widely used in various hydraulic and pneumatic systems where strength, precision, and durability are critical:
Main component for mobile equipment cylinders in construction and agriculture.
Smooth internal finish ensures efficient compressed air operation.
Withstands harsh conditions in loaders, crushers, and drilling rigs.
Used in hydraulic systems of offshore rigs and onshore equipment.
Facilitates precise motion control in presses, robotics, and machine tools.
Ensures reliable performance in winches, cranes, and deck machinery.
Forklifts, cranes, and lifting platforms rely on ST52 honed tubes for hydraulic actuation.
Our factory maintains a large inventory of ST52 Honed Tubes to ensure quick delivery for global customers.
Standard sizes always in stock
covering most hydraulic cylinder applications.
Customized dimensions available
tailored production for OEM and project-specific requirements.
Warehouse capacity
Over 5,000 tons of honed and SRB tubes in ready-to-ship condition.
Global logistics support
Fast dispatch from Wuxi (near Shanghai port) for worldwide delivery.
This allows distributors, stockists, and engineering companies to reduce lead times and secure continuous supply.
Every ST52 Honed Tube undergoes strict quality control before shipment. Our quality department is equipped with advanced testing instruments to guarantee product consistency:
Spectrometer testing ensures compliance with ST52 steel grade.
Bore diameter, wall thickness, and straightness checked with precision instruments.
Ensures Ra value meets required tolerance for seal life.
Verifies mechanical strength and uniformity.
Confirms leak-proof performance under high pressure.
For coated or plated tubes to verify corrosion resistance.
Our ST52 Honed Tubes are manufactured under strict quality systems and come with complete documentation:
These certificates assure distributors and engineering companies of the product’s traceability, reliability, and compliance with international standards.
