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Our Finished Hydraulic Cylinder Barrels are precision-machined, honed steel tubes ready for direct assembly into hydraulic cylinders.
Our Finished Hydraulic Cylinder Barrels are precision-machined, honed steel tubes ready for direct assembly into hydraulic cylinders.
These barrels are designed to ensure:
·Perfect piston fit and smooth travel
·High pressure performance
·Long service life
·Ideal for hydraulic systems in industrial machinery, mobile equipment, construction, and automation applications.
Typical Steel Grades
·EN 10305-1 / E355 – cold-drawn seamless steel
·ASTM A519 / ST52 / 20MnV6 / 27SiMn – seamless or welded steel, high strength and fatigue resistance
·Other steel grades available upon request for special mechanical or corrosion-resistant requirements
Common Sizes (OD × ID × WT × Length)
·Custom diameters and lengths available
·Standard lengths typically range from 500 mm to 3000 mm
·Wall thicknesses designed according to operating pressure and barrel diameter
·Fully customizable to meet ISO, DIN, or customer-specific hydraulic cylinder designs.
Technical Specifications
·Material: Cold-drawn seamless or welded steel, machined
·Surface Finish: Honed ID, Ra ≤ 0.4 μm (customizable)
·Tolerance: H8 or tighter on ID
·Straightness: ≤ 0.3 mm/m
·Roundness: ≤ 0.03 mm
·Application: Hydraulic cylinders, high-pressure systems, heavy-duty machinery
Manufacturing Process
1. Steel Tube Selection – high-strength cold-drawn or welded steel
2. Precision Machining – custom OD and ID dimensions
3. ID Honing – achieves mirror-like finish, Ra ≤ 0.4 μm
4. Quality Control – straightness, roundness, dimensional and surface finish inspection
5. Ready-to-Assemble – ends finished per cylinder design requirements
Key Features & Benefits
·Custom-machined for exact cylinder specifications
·Honed ID ensures smooth piston operation and low leakage
·High-pressure performance – suitable for heavy-duty hydraulic systems
·Ready-to-install – saves assembly time
·Customizable sizes and steel grades
Applications
·Hydraulic cylinders in construction machinery
·Industrial presses and automation equipment
·Mobile hydraulics and lifting equipment
·Marine and offshore hydraulic systems
·Any application requiring precision hydraulic cylinder barrels
QUICK VIEW
Honed & SRB Tube – ASTM A519 ST52 / 20MnV6 / 27SiMn, Mirror ID Finish for Hydraulic Cylinder Barrels
QUICK VIEW
Honed & SRB Tube – EN 10305-2 E355 H8 Ra0.4, Mirror ID Finish for Hydraulic Cylinder Barrels
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 Finished Hydraulic Cylinder Barrel – Custom-Machined, Honed Steel Tube, Ready-to-Assemble, 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 Finished Hydraulic Cylinder Barrel – Custom-Machined, Honed Steel Tube, Ready-to-Assemble. 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.
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You have ordered a batch of welded cold drawn tubes to EN 10305-2 for your hydraulic cylinders. When the first tubes arrive, the outer diameter passes on the gauge, but the inner diameter measures a few hundredths high....
A purchasing engineer sourcing barrels for a 160 mm bore dump-truck hoist cylinder gets two workable quotes in the same week: one drawn from E355, one from 20MnV6, with the 20MnV6 offer carrying a double-digit price pre...
Picture a production planner standing between two finishing lines for hydraulic cylinder tubes. One line uses honing; the other skives the bore and then roller burnishes it. Both can deliver a precise, smooth diameter, ...
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...
