High Quality Hydraulic Cylinder Tube
Our hydraulic cylinder tubes are cold-drawn for high precision and a smooth finish. The seamless, honed construction ensures superior strength and optimal performance, making them ideal for high-pressure hydraulic applications with excellent corrosion and temperature resistance.
- High precision and excellent surface finish
- Corrosion and temperature resistance
- Strong bearing capacity, no deformation under pressure
- Accurate dimensions for reliable performanc
Benefits of Honed Tubes for Hydraulic Cylinders
Baokun manufactures hydraulic cylinder tubes with honed internal surfaces.
Honing is essential for hydraulic cylinders because the inner surface of the cylinder tube must be precise for optimal performance. Without honing, the inter surface can have unevenness and roughness. These imperfections damage seals, cause leaks, and result in poor cylinder performance.
While some low-end or less critical hydraulic cylinders may skip the honing process to reduce costs, this compromises the quality of the tubes. Honed tubes provide smooth operation, maintain tight tolerances, and extend the service life of the cylinder.
Honed tubes remains the industry standard for hydraulic cylinders. Choosing honed hydraulic cylinder tubes means avoiding lower quality and ensuring better long-term performance.
If you are looking for hydraulic cylinder tubing suppliers, Baokun is your trusted partner.
We can provide custom options to meet your specific needs. Whether you need small or large orders, Baokun offers competitive prices and fast production, and delivers reliable honed tubes for hydraulic cylinders.
Specificatinons of Hydraulic Cylinder Tubes
Out Diameter: 40-480mm
Inner Diameter: 30-400mm
Material: Q355B, Q355D, E355,ST52, C20,CK45, SAE1026, 4130, 4140, 34CrMo4, 35CrMo, 42CrMo
Standard:GB/T3639-2009,EN10305-1,EN10305-2, ASTM A519-2006,DIN2391, GB/T1591-2008
Chemical Composition:
|
Steel grade |
Chemical composition,% | ||||||||
| C | Si | Mn | P | S | Cr | Ni | V | Al | |
| ≤ ≥ | |||||||||
| C20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.250 | 0.250 | / | / |
| CK45 | 0.42-0.5 | 0.17-0.37 | 0.5-0.8 | 0.025 | 0.020 | 0.250 | 0.300 | / | / |
| Q355B | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.030 | 0.030 | 0.030 | 0.250 | 0.080 | / |
| Q355D | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.030 | 0.030 | 0.250 | 0.250 | 0.150 | 0.150 |
| E355(ST52) | ≤0.22 | ≤0.55 | ≤1.6 | 0.025 | 0.025 | 0.250 | 0.250 | / | / |
| SAE1026 | 0.22-0.28 | 0.15-0.35 | 0.6-0.9 | 0.040 | 0.050 | / | / | / | / |
| 4130 | 0.28-0.33 | 0.15-0.35 | 0.40-0.60 | 0.040 | 0.040 | 0.80-1.10 | / | / | / |
| 4140 | 0.36-0.43 | 0.15-0.35 | 0.75-1.00 | 0.040 | 0.040 | 0.80-1.10 | / | / | / |
Applications of Hydraulic Cyclinder Tubing
Honed hydraulic cylinder tubes are crucial because their precise surface finish and dimensional accuracy directly affect cylinder performance.
The honing process creates an ultra-smooth, cross-hatched surface inside the tube, which improves lubrication retention and reduces friction between the piston and cylinder wall.
This minimizes wear and extends the cylinder’s service life. The consistent inner diameter from honing ensures a tight seal, preventing fluid leakage and maintaining hydraulic pressure.
These tubes also enhance the overall durability of hydraulic systems used in heavy machinery, construction equipment, and industrial automation, where reliability and efficiency are critical.
Continuous casting machine Excavator bucket cylinder
Lift cylinder of forklift truck Steering gear hydraulic system
Manufacturing Process of Hydraulic Cylidner Tubes
Honing is a precision finishing process that targets the inside diameter (ID) of hydraulic cylinder tubes. After cold drawing, the tube’s inner surface is not smooth or accurate enough for hydraulic use. Honing corrects this by removing small amounts of material to achieve a highly accurate diameter and an optimal surface finish.
The honing tool uses abrasive stones that move in a controlled, oscillating motion while rotating inside the tube. This creates a characteristic cross-hatch pattern on the surface. This pattern is not just aesthetic — it plays a key role in retaining lubricant and maintaining a proper seal between the piston and cylinder wall.
Why Choose Baokun?
Baokun supplies high quality honed tubes for hydraulic cylinders. Our seamless steel tubes are made from carbon steel or alloy steel. All products comply with international standards, including ASTM, ASME, API, JIS, BS, DIN, and GOST. Quality is consistent, and performance is reliable.
- Wide Range of Dimensions: We offer honed hydraulic steel tubes in a variety of sizes, including diameters from 8mm to 1020mm and thicknesses from 1mm to 200mm.
- Custom Manufacturing: We produce hydraulic cylinder tubes based on your specific requirements. Precise tolerances can be achieved with flexible production options.
- Comprehensive Services: Baokun offers a full range of processing services. These include cutting, chamfering, punching, welding, bending, grooving, pickling, sandblasting, coating, and galvanizing.
- Large Inventory and Fast Delivery: Our factory in China stocks thousands of tons of seamless hydraulic cylinder tubes, ensuring fast delivery. As a direct manufacturer, we offer factory-direct pricing with clear competitive advantages.
FAQ
Why is honing important for hydraulic cylinders?
The smooth inner surface reduces friction between the piston seal and the tube wall, minimizing wear and extending the service life of both the seal and the cylinder. It also ensures consistent, leak-free operation under high pressure.
What are hydraulic cylinder tubes made of?
Hydraulic cylinder tubes are typically made of steel or alloy steel, with high-quality options featuring chrome-plated or stainless steel for enhanced wear and corrosion resistance. The material must provide sufficient strength for high-pressure operation and a smooth surface for piston movement, ensuring reliable performance in industrial and heavy machinery applications.
Should hydraulic cylinder tubes be honed?
Yes. Honing improves the inner surface of the cylinder tube by removing scratches, uneven areas, and machining marks that can damage seals. A smooth, honed surface reduces friction, prevents leaks, and ensures the piston moves efficiently, extending the service life of both the cylinder and its seals.
What happens when a hydraulic cylinder fails?
A failing hydraulic cylinder can cause loss of force, incomplete stroke, or unstable movement. Seal damage leads to pressure loss, while external leaks create safety hazards. In severe cases, rod bending or barrel damage results in costly downtime. Regular inspection and timely maintenance are essential to prevent unexpected failures.
How can I determine the size of my hydraulic cylinder?
Measure the bore diameter, rod diameter, and stroke length from fully retracted to fully extended. Also check the mounting type and pin dimensions to ensure compatibility with your equipment. Where available, refer to the cylinder nameplate or technical drawing for precise specifications, ensuring a proper fit and stable performance.
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