Our OEM Open TBM Cylinders are engineered for demanding tunnel boring applications, featuring superior construction and performance characteristics.

• Internals: Cylinder barrel meets GUOYUE EU/US metallurgical standard CD250 structure with materials including 45#, 42CrMo, or 27SiMn. Bore honed to H8 precision with surface roughness Ra<0.4μm.
• Components: Heads, base, trunnions, and pistons exclusively made of 45# steel with no cast iron or cast steel components.
• Buffering: Multiple buffering options including fixed and floating buffer structures for effective deceleration across various pressures and speed ranges.
• Welding: 100% ultrasonic impact treatment on all pressure-bearing and load-critical welds, eliminating weld stress (removal rate ≥90%) and enhancing fatigue strength.
• Sealing: Premium imported seals from Sweden Trelleborg, Germany Merkel, and GP.
• Testing: Complies with GB/T15622-2005 standards and internal premium standard Q/GAKY014-2023, including factory test reports and product qualification certificates.

• High Load Capacity: Engineered for 5,000-25,000 kN thrust forces in hard rock conditions
• Precision Alignment: Ensures ±1mm boring accuracy for tunnel integrity
• Abrasion Resistance: Hard-chromed rods with ceramic coatings withstand quartz-rich geology
• Minimal Maintenance: Reinforced seals endure 10,000+ hours in gritty environments
• Custom Integration: Tailored stroke/mounts fit specific TBM designs
• Corrosion Defense: Phosphate/polymer coatings resist acidic groundwater
• Rapid Response: Direct OEM supply reduces downtime

• Hard Rock Tunneling: Gripper thrust systems in granite/basalt formations (e.g., mountain rail/road tunnels)
• Hydroelectric Projects: Main drive cylinders for headrace/tailrace tunnels under 200 MPa rock pressure
• Mining Shafts: Shaft-boring machines in deep ore mines with high geostress
• Dry Geology: Stable sedimentary rock tunnels without pressurized groundwater ingress

• Pre-production samples provided before mass production
• Final inspection conducted before shipment
• 1-year warranty from shipment date
• Free repair or replacement for defects arising from design or manufacturing within warranty period

Guoyue Hydraulic Equipment Manufacturing (Jiangsu) Co., Ltd. is a technology enterprise specializing in hydraulic cylinder production since 2022. With a registered capital of 50 million yuan, we serve global markets including North America, Europe, Africa, and Asia.

• Accepted Delivery Terms: FOB
• Accepted Payment Currency: USD, EUR
• Accepted Payment Type: T/T
• Languages: English, Chinese