Why Quality Tubing Matters in Hydraulic Cylinders

Cylinder Integrity

Superior tubing ensures structural strength, extended durability, and completely leak-free operation even under extreme conditions

Precision Engineering

Expertly honed and chrome-plated tubing dramatically extends service life under high-pressure environments

Optimized Performance

The right tubing selection optimizes performance across construction, automotive, and manufacturing industries

Key Features of Hydraulic Cylinder Tube

1. Superior Precision

   • IT6-IT8 grade accuracy, ≤0.01mm cylindricity (high-end), Ra 0.2-0.6μm surface roughness; ensures tight piston-cylinder fit and low friction.

2. Strong Pressure & Wear Resistance

   • HB220-250 hardness, 355-930MPa yield strength; withstands up to 63MPa pressure, fatigue life ≥5×10⁶ cycles (high-end).

3. Reliable Sealing & Leakage Control

   • Compatible with advanced seals (Glyd Rings, etc.), 40% reduced seal wear, leakage rate <0.5%; cross-hatch texture optimizes oil film retention.

4. Wide Condition Adaptability

   • Custom materials (20#, 45#, 27SiMn, 304/316 SS, 42CrMo) for -20℃~120℃ temp, corrosion, dust, or humidity.

5. Easy Assembly & Cost-Saving

   • Oxide-free outer wall, ≤0.02mm end perpendicularity; direct welding, no secondary processing; 10-15% lower system energy consumption.

6. Global Compliance & Traceability

   • Meets ISO 4394/ASTM A53/DIN 2391/JIS G3454; CE/RoHS 2.0/FDA/API 7K certified; with traceability codes and SGS/TÜV reports.

7. Flexible Customization

   • Tailored length (0.5-18m), diameter, wall thickness, materials; small-batch support, 15-25 days lead time, DDP delivery.

Hydraulic Cylinder Tube is a high-precision steel tube specifically designed for hydraulic cylinder barrels, with honed tubes accounting for over 90% of the market share. Its primary functions include providing precise guidance for piston movement, bearing sealing pressure, and serving as a transmission channel for hydraulic oil, making it a core component of hydraulic system actuators. Compared to standard honed tubes, it features enhanced inner hole precision stability, surface texture compatibility, and material mechanical properties to meet the three core requirements of hydraulic cylinders: high-pressure reciprocating motion, sealing adaptation, and harsh working condition resistance. It is widely used in hydraulic actuation systems of high-end equipment such as construction machinery, aerospace vehicles, and special-purpose vehicles.

what is Hydraulic Cylinder Tube

Application Highlights

Heavy Equipment

Hydraulic cylinders for construction, mining, and agriculture machinery operating in demanding field conditions

Automotive Manufacturing

Press cylinders and robotic arms requiring precision movement and reliability in high-volume production environments

Industrial Machinery

Tool and mold construction, die-casting, and hydroforming applications demanding consistent performance

Custom Engineering

Specialized sizes and alloys available for unique engineering requirements and mission-critical applications

1. What is a Hydraulic Cylinder Tube and its core functions?

   Hydraulic Cylinder Tube is a high-precision steel tube tailored for hydraulic cylinder barrels (honed tubes dominate over 90% of the market). Its core functions include providing precise piston guidance, bearing sealing pressure, and acting as a hydraulic oil transmission channel, serving as a key component for hydraulic system actuators.

2. What are the key technical parameters for high-end hydraulic cylinder tubes?

   High-end models feature IT6 grade dimensional accuracy, inner surface roughness (Ra) of 0.2-0.4μm, inner hole cylindricity ≤0.01mm, wall thickness uniformity ≤±0.05mm, pressure-bearing capacity ≥45MPa, and fatigue life ≥5×10⁶ reciprocating cycles.

3. Which material is suitable for high-pressure hydraulic cylinders in mining machinery?

   27SiMn is the preferred material, with a yield strength ≥650MPa, high-temperature and corrosion resistance. It meets the needs of mining machinery’s high-pressure (≥35MPa) and dusty working conditions, and requires a 72-hour salt spray test report for overseas customers.

Frequent Asked Questions (FAQs)