Auxiliary Track Lifting Cylinder

Bore: Φ100 mm

Rod: Φ45 mm

Stroke: 650 mm (long stroke for auxiliary lifting and pre-positioning)

Operating pressure: continuous 16 MPa, max 18 MPa

Max push force: 141 kN (at 18 MPa, full-bore side)

Max pull force: 112 kN (at 18 MPa, annular side, for rapid retraction)

Breakaway pressure: ≤0.3 MPa (low-friction seals, sensitive response)

Piston velocity: <0.5 m/s

Operating frequency: intermittent, several auxiliary adjustments per lifting operation

Internal leakage: ≤0.025 ml/min (at 16 MPa, over seal service life)

Temperature range: -20 ℃ to +80 ℃ (standard); -40 ℃ to +120 ℃ customizable

Suitable for: railway tamping machines, track lifting-and-lining machines, turnout tamping machines, etc.

Long-Stroke Fine Adjustment

The barrel is forged from high-yield-ratio quenched and tempered alloy steel, with critical welds UT/MT inspected. The 650 mm long stroke provides a wide adjustment range; the piston rod is precision hard-chrome plated (HV900–1100), providing smooth, precise micro-adjustment under the track panel weight and ballast resistance.

Coordination with Main Lifting Cylinder

It can independently perform fine longitudinal smoothness adjustments while or after the main lifting cylinder makes large-stroke lifts, achieving sub-millimeter precise rail surface elevation positioning to meet stringent high-speed rail track geometry requirements.

High Side-Load Resistance & Guidance

Wide-profile bronze or composite guide rings embedded in the bore, with precision clearance control, effectively absorb radial forces from uneven clamp loading and track panel offset, preventing rod scoring and ensuring long-term smooth operation.

Multi-Stage Seals & Dust Protection

A metal scraper ring and multiple heavy-duty wipers at the gland effectively block ballast dust, stone chips, and rainwater. The main seal is a hydrolysis-resistant polyurethane and filled-PTFE composite, guaranteeing zero external leakage over the entire service life in all-weather outdoor operation.

Internal Cushioning for Noise Reduction

Progressive cushions at both ends automatically decelerate and absorb energy at the stroke limits, eliminating rigid impacts, reducing noise, and protecting the clamp mechanism and the cylinder.

Compact Construction & Maintenance-Free

Mounting dimensions are optimized for the compact space between the vehicle frame and auxiliary lifting device. Self-lubricating composite bushings in the clevises eliminate daily greasing and provide long service life under high-frequency operation.

Optional Position Monitoring

A built-in displacement sensor can be integrated to provide real-time auxiliary lifting height feedback, enabling precise closed-loop control of rail surface elevation via the main control system.

Special bore, rod, and stroke

Built-in displacement sensor

Full stainless steel body and piston rod (highly corrosive environments)

Explosion-proof / mining certifications

Special mounting distances and port configurations