Shield Machine OEM Telescopic Hydraulic Cylinder For Tunnel Boring Machine

Premium Quality Hydraulic Cylinders - Quality Assured

1. 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.
2. Buffering:Multiple buffering options including fixed and floating buffer structures to ensure effective deceleration across various pressures and speed ranges.
3. 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.
4. Sealing:All cylinders exclusively use premium imported seals from Japan NOK, Sweden Trelleborg, Germany Merkel, and GP. No domestic seals are utilized.
5. 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.
6. Warranty: One-year warranty from shipment date. Free repair or replacement provided for defects arising from design or manufacturing within the warranty period. Advantages:1. Extreme Load Capacity:Engineered to withstand massive thrust forces and ground pressure in challenging geologies.
2. Precision Alignment: Ensures accurate tunnel boring and segment ring installation for structural integrity.
3. Superior Durability:Hardened surfaces and corrosion-resistant materials combat abrasive wear in harsh underground environments.
4. Seamless Integration:Custom OEM design guarantees perfect fitment and compatibility with specific TBM systems.
5. Operational Stability:Maintains shield position during excavation and ring-building, minimizing alignment deviations.
6. Extended Service Life: Robust construction reduces downtime and replacement frequency.
7. Cost Efficiency: Direct OEM sourcing lowers lifecycle costs via optimized performance and reliability.