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Pipe H8 Tolerance Honing Tube St52 Hydraulic Cylinder Honed Tubes Precision Naturalseamless Steel Round

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Pipe H8 Tolerance Honing Tube St52 Hydraulic Cylinder Honed Tubes Precision Naturalseamless Steel Round

1. Definition and process
Process: Through Honing processing, the inner wall is micro-cut with a grinding stone to remove burres and correct the geometry to form a cross-grained structure.
Features: Low inner wall roughness (usually Ra 0.1~0.4μm), high straightness, good roundness, suitable for close coordination with seals.

2. Main Applications
Hydraulic Systems: Hydraulic cylinders (e.g., excavators, injection molding machines) used to reduce friction and prevent leakage.
Pneumatic Systems: High-precision cylinders (automated equipment, robotic arms).
Industrial Equipment: Injection molding machines, die casting machines, machine tool guideways, and other applications requiring high pressure and wear resistance.
Special Applications: Precision moving parts in aerospace and military equipment.

3. Common materials
Carbon steel (e.g. ST52, SAE 1020/1045)
Features: economical and practical, moderate strength.
Uses: General hydraulic system, construction machinery.
Alloy steel (e.g. 27SiMn, 4140)
Features: tempered treatment, high strength, wear-resistant.
Uses: heavy-duty hydraulic cylinder, mining machinery.
Stainless steel (e.g. 304, 316, 17-4PH)
Features: corrosion resistance, high temperature resistance.
Uses: food machinery, ships, chemical equipment.
Other: aluminum (lightweight requirements), chrome-plated steel tube (additional wear layer).

4. Material selection and treatment
Heat treatment: tempering (improve strength), quenching (enhance surface hardness).
Surface treatment: hard chromium plating (corrosion resistance, wear resistance), phosphating (improve lubricity).
Material selection basis: load pressure, corrosion environment, cost budget.

5. Precautions
Seal matching: The sealing material (such as polyurethane, nitrile rubber) should be selected according to the inner wall roughness.
Installation cleanliness: Avoid impurities from scratching the inner wall and affecting the sealing performance.
Supplier qualification: Select manufacturers with precision honing equipment and testing capabilities (such as roundness meter, roughness meter).

Internal Diameter Accuracy:	H7, H8, H9
Internal Roughness:	Ra0.2 ~ 0.8um
Standard Length:	3 ~ 8 meters
Standard Size of External:	OD20 ~ 420mm
Standard Size of Internal:	ID18 ~ 350mm
Material:	JIS G3445 STKM 13C or Mechanical Construction Use Pipes
Size:	Customizable
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Product Description

Flowex was established in 2010 and speclized in honed tube, chrome rod and cylinder parts for industrial applications. We manufactures a diverse range of standard and special honed tubes, chrome rods and cylinder accessories to suit all types of industrial matching usage. Our products meet every major industry standard, with other certifications available upon request. All Our honed tubes, chrome rods and cylinder parts are designed to deliver long, efficient service with low maintenance requirements, guaranteeing high productivity throughout the life of the product.

Flowex has gained widespread praise and recognition from customers all over the world for its outstanding quality and excellent service.

China Factory Honed Tube High Precision Honed Tube for Hydraulic Cylinder

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Our premium ST52.3 BK+S honed tubing is DIN2391 certified and features ISO H8 tolerances, providing exceptional precision for hydraulic and pneumatic systems. Available in inner diameters from 20 mm to 1500 mm and with a surface finish Ra of 0.20-0.40 microns, these 4-meter lengths ensure optimal performance in demanding applications such as hydraulic cylinders and barrels.

Hard chrome plated piston rods are made from black round steel bars, processed through peeling, centerless grinding, polishing, chrome plating, and polishing.

Products meet international standards.

Ra 0.20um, 0.2/1000 mm, f7 tolerance.

Why Choice us

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Equipment

As one of the biggest honed tube piston rod manufacturers in China, we equipped with advanced production facilities and inspection facilities for honed pipe manufacturing and inspection.

Below manufacturing equipment for steel honed tubing and chrome plated steel bar.

China Factory Honed Tube High Precision Honed Tube for Hydraulic Cylinder

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These honed tubings are designed for heavy-duty applications in mining machinery and automotive shock absorbers, offering unparalleled durability. Oil-immersed packaging provides superior corrosion protection during transport and storage. Manufacturers trust our precision tubing for power steering systems and other critical hydraulic applications with extremely high tolerance requirements.

Our CK45 honed tubing is precision-engineered to DIN2391 standards, ensuring superior durability and performance in hydraulic and pneumatic systems. Available in inner diameters from 20mm to 1500mm and with a tolerance grade of ISO H8, these tubings are ideal for high-precision applications such as cylinder barrels and automotive shock absorbers. A smooth inner surface roughness Ra of 0.20-0.40μm minimizes friction and maximizes efficiency.

These honed tubings are designed for heavy-duty applications, making them ideal for mining machinery and power steering systems, offering exceptional strength and reliability. The 4-meter length makes it suitable for a variety of industrial needs, while the oil-immersed packaging ensures protection during transportation and storage. Whether used in hydraulic cylinders or pneumatic systems, our CK45 honing tubing offers unparalleled performance and service life.

Upgrade your machinery with our high-quality honing tubing. Designed specifically for high-strength hydraulic systems and automotive applications, the CK45 steel construction ensures superior wear resistance, making it an economical choice for harsh environments. Our precision-machined tubing meets DIN2391 and ISO H8 standards, satisfying your precision engineering needs.

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