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20+
More than 20 years of experience
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24/7
Quick response
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100+
Production per month
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440+
Export to more than 40 countries

Who We Are

Changzhou BOS Hydraulic Technology Co., Ltd, located in Wujin District, Changzhou Industrial Park in Changzhou, is a company engaged in the research, production and sales of high-quality precision pipes. Since its establishment, we have consistently been guided by technological innovation, quality-oriented, and customer-driven, we are committed to providing exceptional products and services. With advanced technical experience, strict quality management system, continuous investment in R&D and efficient service team, we have earned wide recognition and trust in domestic and international markets, establishing ourselves as an outstanding brand in the precision pipe industry.

With more than 23 years of development, BOS Hydraulic currently has 3 factories, 1 research center and 1 sales center. More than 100 customers from 40 countries and regions have established long-term business relationships with us. The products are certified by national and international bodies. We have rich experience in the production of honed pipes, ground and roller blued pipes, chrome rod, induction hardened chrome rod, hollow chrome rod, hydraulic cylinder cylinder, chrome piston rods and other hydraulic cylinder assemblies.

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Why Choose Hydraulic BOS

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"A standard is a quality, not a goal"
BOS Hydraulic maintains uncompromising standards in all operations. By integrating customer-specific requirements into our production processes, we guarantee precision solutions tailored to precise specifications. To further demonstrate our commitment, we offer a one-year free replacement policy for standard wear components.
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OUR PRODUCTS

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Pneumatic Alloy Steel Honed Tube
Pneumatic alloy steel honing tubes are special cylindrical steel products designed specifically for pneumatic systems where compressed air or gas powers the mechanical process.
304 Stainless Steel Hydraulic Cylinder1
304 Stainless Steel Hydraulic Cylinder
304 stainless steel hydraulic cylinder is a hydraulic actuator made of 304 stainless steel material, which has excellent corrosion resistance and high temperature stability
304 Stainless Steel Piston Rod
304 Stainless Steel Piston Rod
304 stainless steel piston rod is a mechanical transmission component made of 304 stainless steel, which has corrosion resistance, high strength, and wear resistance. It is widely used in hydraulic, pneumatic equipment, and various mechanical transmission systems.
4130 Alloy Steel Honed Tube1
4130 Alloy Steel Honed Tube
4130 Alloy Steel Honed Tube is an industrial tube known for its high strength and high precision. It is widely used in hydraulic systems, pneumatic equipment, heavy machinery, energy industry, aerospace and other fields.
45 Chrome Plated Piston Rod
45 Chrome Plated Piston Rod
The 45 chrome plated piston rod is a key component of hydraulic systems made of 45 # steel, which has undergone quenching and tempering treatment and surface chrome plating. It is widely used in engineering machinery, mining equipment and other fields.
Engineering Hydraulic Cylinder1
Engineering Hydraulic Cylinder
Engineering hydraulic cylinder is a device that converts hydraulic energy into mechanical energy, mainly used to achieve linear reciprocating motion or swinging motion
Hard Chrome Plated Piston Rod4
Hard Chrome Plated Piston Rod
A hard chrome-plated piston rod is a mechanical transmission component with a surface treated by a hard chrome plating process. It is primarily used in hydraulic and pneumatic systems, construction machinery, and automotive manufacturing. Its key feature lies in the electroplating process that deposits a chrome layer, typically 20μm or thicker, onto the base material (such as 45# steel or stainless steel), significantly enhancing its hardness, wear resistance, and corrosion resistance.

What else can BOS Hydraulic do for you?

Professional Manufacturer
Bos Hydraulics is a professional hydraulic manufacturer equipped with its own production facilities for the production of ground pipes and chrome rods. We specialize in tailor-made solutions, a core competence of our company.
Project Consultant
BOS Hydraulic provides industrial hydraulic solutions including:

‌Customized Hydraulic Systems for Wind Turbines, Oil Platforms and Heavy Equipment

‌Integrate smart automation with IoT monitoring

Procurement of BOS hydraulic systems
With decades of industrial experience, we offer:

‌Global Supplier Network: Access to 200 certified suppliers of hydraulic components

‌Cost optimization: 15-30% savings on procurement through bulk purchases

BOS Hydraulic Customization Service

With an extensive engineering team and state-of-the-art manufacturing capabilities, BOS Hydraulic specializes in custom hydraulic system design for industrial applications. In addition to standard hydraulic components, we adapt to different equipment needs, including:

Special hydraulic power units for construction, agriculture and shipbuilding

Automation-integrated hydraulic solutions for smart factories

Purpose-built fluid management systems for renewable energy projects

Our modular design approach allows for seamless integration into existing equipment, while our R&D-based innovations solve unique challenges in high-pressure, high-efficiency environments.

BOS Hydraulic's Product Services

BOS Hydraulics With leading technical expertise, a rigorous quality management system, continuous R&D investment, and an efficient service team, we have earned widespread recognition and trust in domestic and international markets, establishing ourselves as a distinguished brand in the precision tubes industry.
Honed Tube
Hydraulic Piston Rod
Linear Shaft Rod
Custom Hydraulic Cylinder
Cold Drawn Seamless Tube
Chrome plated Bar
Hollow Chrome Bar
Induction Hardened Chrome Rod
Hydraulic Cylinder Barrel
Alloy Steel Honed Tubes
Alloy Steel Mechanical Tubing
High-Pressure Cylinders
Linear Hollow Shafts
Seamless Honed Barrel
Solid Piston Rods
Hollow Shafts
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Types Of Honing Tubes

Honing tubes are primarily classified by their internal groove patterns: spiral, straight, and cross-hatched. This classification is based on the pattern of grooves cut into the tube's inner surface, which are essential for lubricant retention and debris removal during the honing process.

Extended Component Service Life

Improved Surface Load-Bearing Capacity

Optimized Lubrication and Friction Reduction

Enhanced Sealing Performance

Consistent and Reliable Operation

Reduced Running-in Time

Efficient Debris Retention

Superior Dimensional Control

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Other Products You May Be Interested In

Diversified BOS products can improve the efficiency of your production and support your business.

Check out our customers' comments

Frequently Asked Questions

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How does a honed tube differ from a standard seamless tube?
While both start as seamless tubes, a standard tube has a rough, inconsistent inner surface with potential scale and imperfections. A honed tube has a precisely finished ID with tight tolerance, superior surface finish, and a stress-relieved structure, making it ready for immediate use in precision applications.
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What materials are honed tubes made from?
The most common material is CDS 1026 (Cold Drawn Seamless 1026 Steel) due to its excellent strength, weldability, and surface finish capabilities. Other materials include ST52.3, 1045, 4140/4130 alloy steel, and stainless steels like 304 and 316 for corrosive environments.
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What are the key specifications for ordering a honed tube?
The three most critical specs are:  Inner Diameter (ID) and Tolerance: e.g., 100mm ± 0.05mm.  Wall Thickness and Tolerance: Must be sufficient to handle the system pressure.  Surface Finish (Ra): The roughness average, typically between 0.2 µm to 0.8 µm (Ra) for hydraulic cylinders.
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What is a typical surface finish (Ra) for a hydraulic cylinder tube?
A common range is Ra 0.2 µm to Ra 0.4 µm. A smoother finish (lower Ra) reduces friction and seal wear, while a slightly rougher finish can be better for initial seal break-in and oil retention.
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How do I determine the right wall thickness for my honed tube?
Wall thickness is calculated based on the maximum operating pressure of your system, the tube's material yield strength, and an appropriate safety factor (often 4:1 for cylinders). Use the standard Barlow's formula for thin-walled cylinders as a starting point, but always consult with an engineer or your tube supplier.
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Are honed tubes available "off-the-shelf"?
Suppliers often keep a limited range of common sizes in stock. However, due to the vast number of possible combinations of OD, ID, length, and material, most honed tubes are made to order (MTO).
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