Seamless Honed Tube From China Manufacturer & Supplier
Baokun stands out as one of the trusted honed tube/SRB Tube manufacturers and reliable honed tube/SRB Tube suppliers, delivering precision-engineered solutions for hydraulic applications. Our honed steel tubes are smooth, durable, and built to handle demanding environments.
Features of Our Honed Steel Tubing
- Seamless Design: Smooth and durable tubes for optimal performance.
- High Precision: Manufactured with exact tolerances for demanding applications.
- Custom Dimensions: Tailored to fit your specific project needs.
- Competitive Pricing: Affordable solutions without sacrificing quality.
- Strict Quality Control: Ensuring consistent reliability and performance.
Seamless Honed Steel Tubing/SRB Tube Series From Baokun
Honed tube refers to a type of metal tube that has undergone precision machining to ensure its inner diameter (ID) is smooth, uniform, and accurately sized. The honing process involves using abrasive tools to polish and remove material from the interior surface of the tube.
Honed ID tubing is commonly used in hydraulic and pneumatic cylinders, where the smooth surface minimizes friction between components such as pistons and seals. It is also found in industries like automotive, aerospace, construction, and manufacturing for various high-precision and high-performance purposes.
| Product Name | Seamless Honed Steel Tubes/SRB Tubes |
| Standard | DIN2391, DIN2393, EN10305, ASTM A519, GOST8732 |
| Material | Carbon Steel （E355, ST52, CK45） Alloy steel (4130, 4140, 34CrMo4, 35CrMo, 42CrMo） |
| Inner Diameter Tolerance | H7,H8,H9,H10 |
| Strightness Tolerance (mm/mm) | 0.3 – 1.0/1000 |
| Surface Roughness (μm) | 0.1 – 0.4 |
| Manufacturing Length | 3 – 9m, or depend on your requirments |
Feel free to contact us for detailed information and to place your inquiry.
Seamless honed steel tubes/SRB Tubes are built to withstand wear and tear over time. Their durability means they require less maintenance and replacement, ultimately saving costs in the long run.
Our seamless honed tubes/SRB Tubes are designed with coatings or treatments that enhance their resistance to corrosion. This makes them suitable for use in challenging environments where exposure to moisture and chemicals is common.
Because they are seamless, these tubes do not have weld seams, which can be weak points. This seamless construction results in greater strength and allows them to handle higher pressures and loads without risk of failure.
The honing process creates a very smooth inner surface, which minimizes friction. This is crucial for efficient fluid flow, helping to improve the overall performance of hydraulic systems.
Get In Touch With Us
Lookinf for reliable honed tube manufacturers and suppliers
Baokun offers high-quality seamless honed steel tubes made from premium steel, with customizable specifications and fast, global delivery. Our professional team provides excellent customer service and tailored solutions. Contact us today for a free quote and find the perfect honed tubes for your needs!
Applications of Honed Steel Tubes/SRB Tubes
Hydraulic Systems
They are essential in hydraulic cylinders, providing smooth fluid movement and reducing friction, ensuring reliable operation under high pressure.
Pneumatic Systems
Honed tubes improve the efficiency of pneumatic cylinders by reducing friction, enhancing air or gas movement, and supporting energy-efficient operations.
Automotive Industry
Used in hydraulic systems for braking, steering, and suspension, honed tubes help control fluid flow, ensuring vehicle safety and performance.
Construction Equipment
Honed tubes are critical in the hydraulic cylinders of machinery like excavators, loaders, and cranes, where they manage high pressures and heavy loads.
More Information
Tolerance of Honed Tube
| Inner Diameter (mm) | Inner Diameter Tolerance (mm) |
Wall Thickness Tolerance (mm) |
|||
| H7 | H8 | H9 | H10 | ||
| ≤30 | +0.021/0 | +0.033/0 | +0.052/0 | +0.084/0 | ±7.5%>210mm±10% |
| 30≤50 | +0.025/0 | +0.039/0 | +0.062/0 | +0.100/0 | |
| 50≤80 | +0.030/0 | +0.046/0 | +0.074/0 | +0.120/0 | |
| 80≤120 | +0.035/0 | +0.054/0 | +0.087/0 | +0.140/0 | |
| 120≤180 | +0.040/0 | +0.063/0 | +0.100/0 | +0.160/0 | |
| 180≤250 | +0.046/0 | +0.072/0 | +0.115/0 | +0.185/0 | |
| 250≤315 | +0.052/0 | +0.081/0 | +0.130/0 | +0.210/0 | |
| 315≤700 | +0.057/0 | +0.089/0 | +0.140/0 | +0.230/0 | |
Manufacturing Process Processing
1.Raw material processing
Steel pipe selection:
Baokun selects high-quality cold-drawn seamless steel pipes (DIN 2391,GOST) or hydraulic special pipes (ST52.3, EN 10305-4,8734-75) for processing to meet the different needs of customers.
Inner hole pre-processing: inner diameter allowance 0.3-0.5mm (for subsequent honing)
Cutting:
Fully automatic band saw , cut verticality ≤ 0.1mm/100mm.
2.Deep hole boring
Baokun uses a famous German brand of deep hole drilling and boring machine (BTA system)
Process parameters:
Tool: PCD boring head (suitable for materials with hardness ≤45HRC)
Cutting speed: 80-120m/min, feed rate 0.08-0.15mm/r
Straightness control: ≤0.15mm/m (laser online monitoring compensation)
Coolant: high-pressure oil-based cooling (pressure 8-15MPa, flow rate 120L/min)
3.Heat treatment strengthening
Process type:
Quenching and tempering (quenching + tempering): hardness 28-32HRC (ISO 18265 standard)
Stress relief: 550℃×2h annealing (eliminating more than 90% of residual stress)
Metallographic inspection:
Sorbite content ≥95% (metallographic microscope)
Grain size rating: 7-8 (ASTM E112)
4.Multi-stage honing process
Rough honing stage:
Tool: diamond honing stick (grit size 80#)
Cutting amount: 0.05-0.10mm (reciprocating speed 15m/min)
Fine honing stage:
Tool: ceramic honing stick (grit size 400#)
Surface texture: cross-net pattern 45°±2°, groove depth 4-6μm (ISO 13565-2)
Online compensation: real-time feedback from pneumatic measuring instrument, dimensional accuracy up to IT6 level
5.Surface strengthening treatment
Rolling process:
Hydraulic rolling head (pressure 30-50kN), surface hardness increased by 10-15%
Residual compressive stress: -200 to -300MPa (X-ray diffraction detection)
Cleaning and passivation:
Alkaline electrolytic cleaning (pH 9.5-10.5)
Phosphate passivation treatment (film thickness 2-3μm, ASTM B201)
6.Full-size inspection
Inspection items:
Inner hole roundness: high-precision detector, ≤0.01mm
Surface oil storage rate: laser confocal microscope analysis, ≥25% (VDI 3035)
Straightness: optical autocollimator, ≤0.05mm/1000mm
Our Advanced Equipments
To meet the increasing demand for high-quality honed tubes, we have continuously invested in upgrading our production equipment since 2004. With new honing machines and regular technical improvements, our manufacturing process ensures that the tubes we produce meet strict international standards. This focus on advanced machinery and precision allows us to consistently deliver honed tubes that meet customers’ exact specifications.
Why Choose BAOKUN?
Baokun is your trusted partner for high-quality honed tubes, offering precise customization, fast delivery, and exceptional customer service. With over 10 years of industry experience, Baokun ensures that every product meets rigorous standards for reliability and performance.
- Acceptance of Third-Party Inspection: We offer third-party inspections to verify our products, demonstrating confidence in product quality and meeting international verification standards.
- Anti-Corrosion Treatment: Each honed tube is coated with anti-rust oil and fitted with protective caps, preventing corrosion and extending the product’s lifespan while reducing maintenance costs.
- Precision Customization: Baokun offers tailored solutions for inner diameter, outer diameter, length, and tolerances to meet your specific application needs.
- Fast Response & Efficient Delivery: We guarantee quick responses to inquiries within 2 hours and can ship orders in as fast as 7 days, ensuring timely fulfillment of your demands.
- Flexible Packaging Options: Choose between woven bags or wooden crates for your shipments, ensuring safe and reliable delivery of your products.
Frequent Asked Questions (FAQs)
1.What is a honed tube?
Honed tubes are precision-engineered metal tubes widely used in mechanical applications, known for their high accuracy and smooth internal surfaces. These tubes start as raw steel and undergo a honing process where an abrasive tool refines the inner surface to achieve a precise diameter and high-quality finish. This meticulous process makes honed tubes ideal for applications demanding exceptional accuracy and smoothness.
3. What is the process of honed tube manufacturing?
The honed tube manufacturing process begins with cold-drawn or extruded tubes, which have a rough inner surface. These tubes are first bored to remove excess material and bring the inner diameter closer to the desired size. Then, the honing process is carried out, where abrasive stones are used to grind the inner surface. This step smooths out imperfections and achieves precise dimensional tolerances. The honing ensures the tube has a smooth, even finish, reducing friction and wear. After honing, the tube is cleaned to remove any abrasive residue and then inspected for quality.
4. Can I order custom honed tubes?
Yes, honed tubes can be customized in terms of length, diameter, wall thickness, and material to suit particular applications. Baokun provides customization based on client specifications.
5. Are honed tubes resistant to corrosion?
Honed tubes are often made from corrosion-resistant materials or treated with protective coatings to enhance their durability, especially in environments exposed to moisture or chemicals.
