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

Application Scenarios :
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.