Honed Tube Manufacturer for Hydraulic Cylinders
ZTU Steel is a professional honed tube manufacturer in China, specializing in the production of precision honed tubes for hydraulic cylinder applications. With over 17 years of manufacturing experience, we supply high-quality honed tubes to customers in Europe, North America, South America, Southeast Asia and the Middle East.
Our honed tubes are manufactured from cold drawn seamless steel tubes and processed with advanced honing technology to achieve excellent dimensional accuracy, smooth internal surface finish and reliable mechanical performance.
What Is a Honed Tube?
A honed tube is a precision steel tube with a carefully machined internal diameter. Through the honing process, the inner surface achieves tight tolerances and low surface roughness, making it ideal for hydraulic cylinder barrels.
Compared with ordinary seamless steel tubes, honed tubes offer:
·Superior dimensional accuracy
·Excellent surface finish
·Improved sealing performance
·Reduced friction
·Longer service life of hydraulic systems
Because of these advantages, honed tubes are widely used as cylinder barrels in hydraulic and pneumatic applications.
Available Materials
ZTU Steel supplies honed tubes in various steel grades according to customer requirements.
| Material Grade | Standard |
| ST52 | DIN 2391 |
| E355 | EN 10305 |
| SAE1020 | ASTM A519 |
| CK45 | Customized |
| ST52.3 | DIN Standard |
| C20 | GB Standard |
Custom materials are available upon request.
Technical Specifications
Production Range
Inner Diameter: 30 mm – 500 mm
Outer Diameter: 40 mm – 600 mm
Length: Up to 12 meters
Surface Roughness: Ra 0.2 – 0.4 μm
Tolerance: H8, H9
Straightness: ≤ 0.3 mm/m
Manufacturing Standards
DIN 2391
EN 10305
ASTM A519
GB/T Standards
Customized dimensions and tolerances are available according to customer drawings.
Used as cylinder barrels in hydraulic systems requiring high precision and smooth movement.
Suitable for excavators, loaders, cranes and road construction equipment.
Applied in tractors, harvesters and hydraulic lifting systems.
Used in heavy-duty hydraulic systems operating under demanding conditions.
Ideal for forklifts, lifting platforms and industrial automation equipment.
To ensure consistent quality, every honed tube undergoes strict manufacturing and inspection procedures.
Raw Seamless Steel Tube Selection
Cold Drawing Process
Heat Treatment
Precision Honing
Surface Inspection
Dimensional Inspection
Packing and Shipment
Each production batch is inspected before delivery to guarantee stable quality and reliable performance.
Quality is the foundation of our manufacturing process.
Every honed tube is tested for:
Internal Diameter Accuracy
Surface Roughness
Straightness
Mechanical Properties
Material Composition
Visual Surface Inspection
Material certificates and inspection reports can be provided upon request.
More than 17 years of experience in honed tube and hydraulic cylinder component manufacturing.
Annual production capacity exceeding 20,000 tons.
Advanced inspection equipment ensures stable product quality.
Products exported to more than 50 countries and regions.
Customized dimensions, materials and tolerances according to customer requirements.
Professional sales team providing quotations and technical support within 24 hours.
To ensure safe transportation, our honed tubes are packed using:
Anti-rust oil protection
Plastic caps on both ends
Waterproof packaging
Wooden cases or steel bundles
Customized packaging is available according to customer requirements.
The products are widely used in hydraulic cylinders, engineering machinery, agricultural equipment, mining machinery, lifting platforms and industrial automation systems.
A honed tube undergoes additional precision machining on the internal diameter, resulting in tighter tolerances and lower surface roughness than ordinary seamless tubes.
We commonly provide H8 and H9 tolerances, with customized tolerances available upon request.
Typically Ra 0.2–0.4 μm depending on product specifications.
ST52, E355, SAE1020, CK45 and other customized grades.
Normally up to 12 meters depending on diameter and transportation requirements.
Yes. Customized dimensions and specifications are accepted.
Yes. EN10204 3.1 certificates and inspection reports can be supplied.
Normally 15–30 days depending on order quantity and specifications.
