• Internals: Cylinder barrel adopts GUOYUE EU/US metallurgical standard CD250 structure. Barrel material: 45#, 42CrMo, or 27SiMn. Bore honed to H8 precision with surface roughness Ra<0.4μm. Heads, base, trunnions, and pistons are exclusively made of 45# steel; no cast iron or cast steel components are used.
• Buffering: Multiple buffering options including fixed and floating buffer structures to ensure effective deceleration across various pressures and speed ranges.
• Welding: 100% ultrasonic impact treatment applied to all pressure-bearing and load-critical welds. This eliminates weld stress (removal rate ≥90%) and significantly enhances weld fatigue strength.
• Sealing: All cylinders exclusively use premium imported seals from Japan NOK, Sweden Trelleborg, Germany Merkel, and GP. No domestic seals are utilized.
• Testing & Certification: Factory testing strictly complies with GB/T15622-2005 "Hydraulic Fluid Power - Test Methods for Cylinders" and internal premium standard Q/GAKY014-2023. Includes provision of factory test reports and product qualification certificates.
• Warranty: One-year warranty from shipment date. Free repair or replacement provided for defects arising from design or manufacturing within the warranty period.

This 140-180 double rack swing hydraulic cylinder features high torque output, precise positioning, and smooth rotation. Built with robust steel construction, wear-resistant seals, and corrosion protection for durability. Compact design ensures easy integration, while double rack mechanism delivers balanced force distribution and reliable bidirectional movement.

Ideal for industrial turntables, slewing cranes, and excavator swing systems. Used in solar trackers, wind turbine yaw drives, and material handling equipment. Suitable for construction machinery, mining equipment, and automation systems requiring controlled rotational movement and high load-bearing capacity in harsh environments.

We are based in Jiangsu, China, start from 2022,sell to Domestic Market(40.00%),Africa(10.00%),North America(10.00%),South America(8.00%),Southeast Asia(6.00%),Western Europe(5.00%),Eastern Europe(5.00%),Mid East(5.00%),Central America(5.00%),Eastern Asia(2.00%),Oceania(2.00%),Northern Europe(1.00%),South Asia(1.00%). There are total about 51-100 people in our office.

Always a pre-production sample before mass production;
Always final Inspection before shipment;

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Guoyue Hydraulic Equipment Manufacturing (Jiangsu) Co., Ltd., with a registered capital of 50 million yuan, is a private technology enterprise that integrates research, design, development, production, operation, and service. The company specializes in the

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