Swing Cylinder

Bore: Φ50 mm – Φ200 mm

Rod: Φ25 mm – Φ140 mm

Stroke: ≤3,000 mm

Operating pressure: continuous 16 MPa, max 20 MPa

Max push force: 39 kN – 628 kN (at 20 MPa, full-bore side)

Max pull force: 29 kN – 320 kN (at 20 MPa, annular side)

Breakaway pressure: ≤0.3 MPa

Piston velocity: <0.5 m/s

Operating frequency: high-frequency intermittent, several to dozens of swings per cutting cycle

Internal leakage: ≤0.03 ml/min (at 16 MPa, over seal life)

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

Suitable for: roadheaders, comprehensive heading machines, hard-rock roadheaders, semi-coal roadheaders, etc.

Wide Standardized Range

Bore range from 50 to 200 mm provides thrust from 39 kN to 628 kN, precisely matching the swing requirements of light to heavy roadheaders. Standardized interfaces facilitate OEM batch integration.

Heavy-Duty Anti-Vibration & Precision Swing

The barrel is high-yield quenched & tempered steel with UT/MT welds. The large-diameter thick-walled piston rod is hard-chrome plated (HV900–1100), maintaining exceptional rigidity under cutting impacts and frequent swinging for accurate, drift-free positioning.

High Side-Load Resistance & Guidance

Wide bronze or composite guide rings with precise clearance absorb radial forces from cutting reactions and eccentric loading, preventing rod scoring and ensuring long-term smooth operation.

Multi-Stage Sealing & Dust Protection

A metal scraper ring and multiple wipers block coal dust, rock fines, and water. Hydrolysis-resistant polyurethane and filled-PTFE main seals guarantee zero external leakage over the cylinder’s lifetime.

Internal Cushioning for Noise Reduction

Progressive cushions at both ends eliminate end-stroke impacts, reduce noise, and protect the swing mechanism and cylinder.

Compact & Maintenance-Free

The optimized envelope fits the tight space between the main frame and the cutting boom. Self-lubricating composite bushings at all pivot points eliminate daily greasing and provide long service life under harsh underground conditions.

Optional Smart Monitoring

A built-in magnetostrictive displacement sensor can provide real-time swing angle feedback for automatic profile control and collision avoidance.

Special bore, rod, and stroke

Built-in displacement sensor

Full stainless steel body and piston rod

Explosion-proof / mining certifications

Special mounting distances and port configurations