English
Español
русский
Our Hydraulic Cylinder Tubes are made from cold drawn seamless steel according to EN 10305-1 E355. Designed for precision honing or SRB (Superfinishing) processes, these tubes deliver
Our Hydraulic Cylinder Tubes are made from cold drawn seamless steel according to EN 10305-1 E355. Designed for precision honing or SRB (Superfinishing) processes, these tubes deliver
·Excellent dimensional accuracy and straightness
·Uniform wall thickness for consistent hydraulic performance
·Smooth inner surfaces for reduced friction and long service life
These tubes are widely used in:
·Hydraulic cylinders for industrial machinery
·Mobile hydraulics and construction equipment
·Automotive hydraulic systems
·Pneumatic actuators (where required)
Key Features
·Material: EN 10305-1 E355 cold drawn seamless steel
·Suitable for honing or SRB processing
·Tight dimensional tolerance and straightness
·High-quality surface finish for smooth piston movement
·Available in custom diameters and wall thicknesses
Technical Specifications Table
|
Parameter |
Specification |
|
Standard |
EN 10305-1 |
|
Steel Grade |
E355 |
|
Outer Diameter (OD) |
Customizable, standard sizes available |
|
Wall Thickness |
Customizable, depending on OD |
|
Surface Condition |
Cold drawn seamless |
|
Tolerance |
High-precision, suitable for honing/SRB |
|
Length |
Up to 12 m, cut-to-length available |
Manufacturing Process
1. Selection of high-quality E355 steel billets
2. Cold drawing to achieve seamless tube with precise OD and wall thickness
3. Straightening and surface inspection for high straightness
4. Optional processing: Honing or SRB to achieve ultra-smooth inner diameter
5. Final quality checks for dimensional accuracy and surface finish
Applications
·Hydraulic cylinders for industrial machinery and construction equipment
·Mobile hydraulic systems in agriculture and automotive
·Pneumatic actuators (precision applications)
·High-pressure hydraulic systems requiring tight tolerances and smooth ID
Advantages
·High dimensional accuracy and straightness
·Perfect inner surface for honing or SRB processing
·Reliable long-term performance in hydraulic applications
·Customizable sizes for various cylinder designs
·Suitable for high-pressure, high-load systems
Suao is a professional manufacturer of high-precision cold drawn steel tubes, hydraulic tubes, and mechanical structure tubes, integrating R&D, production, inspection, and global sales. We operate two major production facilities covering over 36,000 square meters, with more than 200 employees and an annual output of 50,000+ tons, supplying customers across major industrial markets worldwide. As Suppliers of Hydraulic Cylinder Tube – Cold Drawn Seamless Steel EN 10305-1, E355, For Honing & SRB, our integrated manufacturing capabilities include cold drawing, heat treatment, straightening, finishing, cutting, chamfering, and surface treatment. These are supported by a full range of advanced equipment for non-destructive testing, chemical analysis, and online dimensional monitoring—ensuring every tube meets stringent quality standards. We invest continuously in automation and smart manufacturing systems to enable flexible, high-mix, low-volume production. Custom Hydraulic Cylinder Tube – Cold Drawn Seamless Steel EN 10305-1, E355, For Honing & SRB. Our products are widely used in construction machinery, hydraulic systems, automotive parts, wind energy, shipbuilding, railways, and oil & gas sectors. Certified to ISO 9001, ISO 14001, CE, and RoHS standards, Hongli is more than a manufacturer—we are a trusted long-term partner for global industrial clients.
Established In
Employees
Export Country
Annual Production
A shock absorber tube order looked fine on paper: the material was listed as SPHC, the wall thickness was within range, and the price was attractive. But when the first batch arrived, the inner diameter measured outside...
When an automotive engineer receives a drawing for a drive shaft, a shock absorber body, or a hydraulic cylinder barrel, the first material decision usually comes down to one question: DOM or seamless? For the large maj...
Manufacturing Processes: How Seamless and Welded Tubes Are Made The performance gap between seamless and welded hydraulic cylinder tubes starts at the mill. Seamless tubing is pierced from a solid round billet—heated an...
What Is Honing? Process, Tools & Typical Results A hydraulic cylinder tube takes 12 minutes to hone. That same tube finished with skiving and roller burnishing needs less than two minutes. That 90% time gap is why m...
