Our factory produces & supplies hydraulic cylinder tubes with detailed specifications as below

1. 
   

   What is a hydraulic cylinder tube?

Hydraulic cylinder tube also is known as Honed Tube, which is usually made of a CDS (Cold drawn seamless) steel tube or DOM (Drawn Over Mandrel) welded steel tube, by honing or skiving&roller burnishing on the inner diameter. The qualified hydraulic cylinder tubing is mostly with extremely precise Inner Diameter(ID) dimensions (such as ISO H7, H8, or H9) and smoothly inside surface with roughness between Ra 0.1μm to Ra 0.4μm.

As the name suggests, hydraulic cylinder tubes are widely used to manufacturer and repair hydraulic cylinders and pneumatic cylinders.

2. 
   

   How to order our hydraulic cylinder tube?

Our factory is one of the leading China hydraulic cylinder tube suppliers & manufacturers. Customers can order hydraulic cylinder tubes from us directly.

The following information shall be supplied by the customers at the time of enquiry and order:

1. the product name “hydraulic cylinder tube”;
2. the quantity (weight, meters,or total length or number);
3. the dimensions of honed tubing, including: outer diameter (OD), Inner Diameter (ID), Length (random length or fixed length)
4. the steel grade;
5. The heat treatment: Stress Relieved Annealing or Hard (no heat treated)
6. ID Honing Tolerance standard: H7, H8, H9 or H10; or customized tolerance requirement.

For an example, below is a sample of inquiry of honed tubing:

Seamless Cold Drawn Precision Honed Tube for Hydraulic Cylinders, EN 10305-1/E355+SR (St52 BK+S), Inside honed H8, ID roughness Ra ≤ 0,4µm, OD 180 mm x ID 160 mm x Length 6000 mm, QTY 50 LENGTHS.

Any questions, customers can contact us by email: [email protected] .

3. 
   

   Hydraulic cylinder tube Manufacturing standards

Honed tubes can be manufactured & supplied with international standards as below:

• DIN 2391 part 1: Seamless precision steel tubes – Dimensions
• DIN 2391 part 2: Seamless precision steel tubes – Technical delivery conditions
• EN10305-1: Steel tubes for precision applications –Technical delivery conditions Part 1: Seamless cold drawn tubes
• ASTM A519 /A519M: Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing
• ASTM A513 /A513M: Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing
• JIS G3445: Carbon Steel Tubes for Machine Structural Purposes

Besides the above popular standards, we also can produce honed hydraulic cylinder tube as per customized requirements upon customers’ requests.

4. 
   

   Product Descriptions: Specification of honed tube

As one of the leading China honed tubing manufacturers and honed tube suppliers, our factory can produce a wide range sizes and various materials of honed id tube as below.

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    4.1. Main types of honed hydraulic cylinder tube

• • • 
      

      CDS honed cylinder tube

The CDS honed cylinder tubes are manufactured from Cold Drawn Seamless Steel Tubes. They are usually produced as per standard DIN 2391, EN10305-1, ASTM A519 etc.

• • • 
      

      DOM honed ID tube

The DOM honed pipes are manufactured from Drawn Over Mandrel Electric-Resistance-Welded Carbon Steel Tubes. These tubes are manufactured as per standard of ASTM A513.

Normally our factory’s product of honed cylinder tubes are cold draw seamless steel tubes (CDS honed ID tubes).

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    4.2. Hone tube Sizes

Younglee’s honed tube factory produces honed cylinder tubing in below size range. Our honed tubing is available both in metric sizes and imperial sizes (inch sizes).

• • • 4.2.1 Metric honed tube size

Younglee’s tube factory produces & supplies honed tubing in below metric size range.

Inside Diameter (ID): 32 mm to 600 mm;

Outer Diameter (OD): 40 mm to 720 mm;

Wall thickness: 4 mm to 60 mm;

Length: we can supply honed pipe with random length or with fixed length up to 15000 mm.

Here below is the metric size chart of our metric size honed tubing.

• • • 4.2.2 Imperial cylinder tube dimensions

Younglee’s tube factory produces hydraulic cylinder tubing in below inch size range.

Inside Diameter (ID): 1.25 inch to 24 inch

Outer Diameter (OD): 1.50 inch to 30 inch

Wall thickness: 0.125 inch to 3 inch.

Length: we can supply honed pipe with random length or with fixed length up to 40 feet.

Here below is the imperial size chart of our imperial size honed cylinder tubing.

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    4.3. Honed tubing Material specification

Our factory manufactures honed tubes with materials of ST52, ST52.3, E355, SAE 1020, SAE 1026, SAE 4140,42CrMo, 27SiMn and so on. Here below is the table of chemical composition and mechanical properties of the materials for honed pipe.

Table 1. Cylinder tubing material Chemical Composition

Table 2. Hydraulic cylinder tubing Mechanical Properties

The most popular steel grades of honed cylinder tubing are St 52.3 /E355, here below is the material specification of ST52.3 and E355. ST52.3 is described as per standard DIN 2391 /DIN2394; while E355 is described as per standard EN10305-1.

Material specification of ST52 /ST 52.3 as per DIN2391 /DIN2394

Material Specification of EN10305-1 / E355

Besides the materials listed as above, our factory also produces and supplies hydraulic cylinder pipes with other materials upon customers’ request.

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    4.4 Hydraulic cylinder tube Tolerance standard

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      4.4.1 Hydraulic cylinder tubing ID tolerance standard

Our honed ID hydraulic cylinder tubing can be supplied with ID tolerance of H7, H8, H9, H10 and H11 depends on customers’ request and its dimension. Here below is the detailed Inside Diameter (ID) tolerance standard.

For imperial honed cylinder tube sizes, the inner diameter tolerance usually is +0.003”/-0.000”.

• • • 4.4.2 Hydraulic cylinder honed tubing Outside Diameter Tolerance standard:

For the O.D tolerance of the honed steel tubing, we can follow the corresponding standards as DIN2391, EN10305-1, DIN1629, DIN 1630, ASTM A513, A519, etc. or upon customers’ request.

• • • 4.4.3 Hydraulic cylinder tubing Straightness Tolerance

The straightness for hydraulic cylinder tubing is also very important, normally our straightness of hone ID tubing is 1mm/meter. However, we can make higher straightness requirement as customers’ request.

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    4.5 Inner Diameter Manufacturing Method of hydraulic cylinder tube

Honed cylinder tubes which including hydraulic cylinder tubes and pneumatic cylinder tubes usually are produced by honing processing or SRB (Skived & Roller Burnished) processing after cold drawing and heat treatment. The mother tube we usually use “Suitable To Hone” Cold Drawn Seamless Tubes. The process of the honed ID tubing is determined upon the dimension, mold available and the request of the customer.

• • • 4.5.1 Honing

Under the honing process, abrasive polishing stones and paper are used to grind to remove small amounts of material in the tube ID, in order to achieve the required extremely precise ID dimensions tolerances, and to remove surface imperfections from the tube drawing process and get the desired surface finish.
Utilizing the honing process, Younglee can supply honed tubing with ID dimensional tolerances as precise as 0.021mm (H7), and surface roughness better (smoother) than Ra 0.8um.

• • • 4.5.2 SRB (Skiving & Roller Burnishing)

The process of Skiving & Roller Burnishing (SRB for short) is a single pass operation that uses a Skiving tool on the forward stroke to skive the tube ID to the required size, and uses roller bearings on the reverse stroke, to burnish the surface to the required roughness. SRB process is faster than honing and normally can produce more precision tolerances and smoother surface finish than honing.
Utilizing the SRB process, Younglee can supply hydraulic cylinder tubing (which are seamless skived tubes) with ID dimension tolerance as precise as 0.021mm (H7), and inside surface roughness smoother than Ra 0.4um.

Normally, hydraulic cylinder tubes and pneumatic cylinder tubing produced by the above two processing are both called Steel Honed Cylinder Tube. Skived &Roller burnished tube is the hydraulic cylinder tube with another different machining method. To choose which manufacturing method, it depends on customers’ preference and the ID of the cylinder tube. Sincerely, nowadays more and more hydraulic cylinder tubes are manufactured through the method of skiving & roller burnishing.

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    4.6 Packing of hydraulic cylinder tube

We pack our hydraulic cylinder tube as per Specification A700, latest revision, “Standard Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment.”

All the hydraulic cylinder tubing will be oiled by the anti-rust oil before delivery. And to protect the inner diameter surface of the honed ID tubing, we will cap the tube ends with plastic end caps, or if customer request we can weld a steel cap to protect the inner diameter of the honed id tubing during loading and unloading. And then the honed pipes will be packed with seaworthy package such as wooden cases or plastic bags.

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    4.7 Advantages / Features of our hydraulic cylinder tubing

As one of the main China hone tube manufacturers and suppliers, hydraulic cylinder steel tubes produced in Younglee’s factory have features as below.

• • • Super Smooth inside surface

The inside surface roughness is Max Ra 0.4 microns ID finish (Max 16Ra ID finish).

• • • High precision tolerance

The inner diameter tolerance of ID hydraulic cylinder tubing could be H7, H8, H9 according to customers request.

• • • Durable in use

As the first class quality hydraulic cylinder tube supplier, our factory only uses prime quality raw materials, which insures the hydraulic cylinder tubes durable in use.

• • • Seamless tube with high pressure resistance;

We mostly use seamless cold drawn tubes to produce honed tubes, which means our honed tubing can work under higher pressure, thus our honed pipes are more reliable for hydraulic cylinder applications.

• • • Flexible order quantity

We accept small quantity orders, even if there is only one piece of hydraulic cylinder tubing we can produce and supply.

• • • Good weld-ability:

The weld-ability of our honed steel tube is very good, this is quite helpful for manufacturing the cylinders.

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    4.8 Honed tube Applications

Honed tubing and Skived & Roller Burnished (SRB) tubes are commonly used as cylinder tubes in applications like hydraulic and pneumatic cylinders, playing a crucial role in both manufacturing and repair processes. Due to their precise dimensional tolerance and smooth surface finish, honed tubes are ideal for applications requiring high accuracy and a polished surface. For instance, honed tubes are often utilized in precision mechanical tubing, hydraulic cylinders, multi-joint construction tubes, steel shafts, injection machines, robotic arms, shock absorbers, accumulators, motor housings, pump barrels, and more.

5. 
   

   Hydraulic cylinder tube Production Process

Our factory’s hydraulic cylinder tubes are manufactured from cold drawn seamless steel tubes. Generally the production process is as below:

Cutting the raw material tube -> Acid pickling the raw tube -> water rinsing the raw pipe -> phosphating and surface lubricating -> cold drawing to make the CDS tube -> heat treating (stress relieved annealing) the CDS tube -> Straightening the cold drawn seamless tubes – > Cut the lengths to the required final lengths -> then honing (or skiving & roller burnishing) the tube inside diameter -> lastly inspecting the tubes and get the finished honed tubes packed.

Here below picture is the production flow chart.

6. 
   

   How do we control the quality of the hydraulic cylinder tube?

Our factory has established a comprehensive quality management system to ensure the high standards of our honed tubes. Below are the key measures we take to guarantee product quality:

1. Premium Raw Materials: We source raw materials exclusively from reputable and approved steel mills. Every incoming batch of mother tubes undergoes a 100% inspection to ensure quality.

2. Controlled Manufacturing Processes: Our factory follows a strict set of Working Instruction Standards for each job position, ensuring all production steps are executed consistently and accurately.

3. Rigorous Quality Inspections: Our team performs multiple quality checks at different stages of production, including First Article Inspection, Process Quality Inspection, and Last Article Inspection to ensure the highest quality of the honed tubes.

4. 100% Final Inspection: Before packing, every honed tube undergoes a thorough final inspection, which includes checks on dimensions (ID, OD, length), surface appearance, inner diameter roughness, quality, straightness, chemical analysis, tensile strength, NDT, and any other required tests as per production standards and customer specifications.

5. Secure and Durable Packaging: We ensure the honed tubes are packed securely to prevent damage during transportation, providing reliable protection throughout the delivery process.

7. 
   

   Why Choose Us?

Customers choose us primarily due to the key advantages of our products and services:

• Extensive Manufacturing Experience: With nearly 30 years of experience in producing hydraulic cylinder tubes (honed ID tubing), our factory has developed a deep understanding of the industry and a strong track record of quality.
• Advanced Manufacturing Equipment: Our factory is equipped with state-of-the-art machinery, including cold drawing machines, cold rolling machines, honing machines, skiving & roller burnishing machines, straightening machines, polishing machines, heat treatment furnaces, grinding machines, and cutting machines. Our professional engineers conduct regular scheduled maintenance to ensure these machines perform optimally.
• High-Quality Raw Materials: We source our raw materials for hydraulic cylinder tubes from renowned Chinese steelmakers such as TPCO, SHA STEEL, and BAO STEEL, the largest and most reputable steel manufacturers in China.
• Precision Manufacturing: Our hydraulic cylinder tubes are produced with exceptional dimensional accuracy. We can achieve tolerances of ISO H7, H8, H9, or H10, depending on the size and customer specifications, ensuring the precision required for hydraulic cylinders.
• Competitive Pricing: We offer highly competitive prices without compromising on product quality.
• Rigorous Quality Control: Our dedicated QC team of over 10 professionals inspects each hydraulic cylinder tube before shipment. Inspections are carried out according to international standards and customer requirements, including Chemical Analysis, Tensile Testing, Dimension Inspection, Roughness Testing, Chrome Plated Thickness Testing, Straightness Checks, and other tests as needed.
• Mature Quality Management System: Our Total Quality Management (TQM) system ensures that all processes related to product quality are tightly controlled, maintaining high standards throughout production.

We have been exporting our hydraulic cylinder tubes to customers in many countries for the applications of hydraulic cylinders for various machines, and other applications. We had gained very good reputation from our customers in China and abroad countries such as USA, Canada, Mexico, Colombia, Saudi Arabia, UAE, South Africa, Russia, Belarus, Thailand, Indonesia, Vietnam, Australia, Ukraine, Brazil, Turkey, Korea, New Zealand, Singapore, Kuwait and so on.

At Younglee, we are committed to providing high-quality hydraulic cylinder tubes that meet your exact specifications. With nearly 30 years of manufacturing experience, advanced manufacturing facilities, and a strict quality management system, we ensure that every cylinder tube is delivered with the highest precision and reliability.

Whether you’re looking for customized sizes or competitive pricing, we are here to support your business needs.

If you’re interested in receiving a quote or learning more about how our products can benefit your operations, don’t hesitate to contact us today. Our team is ready to assist you with any questions and provide tailored solutions for your hydraulic cylinder tube requirements.

Contact us now to get a fast and accurate quote!

Contact Person: Mr. Osmond Lee

Phone: +86-18612-706695

E-mail: [email protected]