POS Machine Auxiliary Cylinder

Bore: Φ150 mm

Rod: Φ63 mm

Stroke: 640 mm

Operating pressure: continuous 20 MPa, max 25 MPa

Max push force: 353 kN (at 20 MPa, full-bore side)

Max pull force: 291 kN (at 20 MPa, annular side)

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

Piston velocity: 0.02 – 0.3 m/s (smooth ejection and retraction)

Operating frequency: intermittent or continuous, 1–2 cycles per forming cycle

Internal leakage: ≤0.025 ml/min (at 20 MPa, over seal service life)

Temperature range: -20 ℃ to +100 ℃ (standard); higher temperatures customizable

Fluid: anti-wear hydraulic oil; fire-resistant fluids optional

Suitable for: ejection / auxiliary stations of powder compacting presses, hot presses, composite material presses, ceramic presses, etc.

Balanced Bidirectional Force

Thrust and pull are nearly equal, ideal for alternating push-and-pull operations such as ejection and retraction or mold floating control.

High Side-Load Resistance & Guidance

Wide-profile bronze or composite guide rings in the bore absorb radial forces under eccentric ejection loads and mold reaction forces, preventing rod scoring.

Multi-Stage Seals & Dust Protection

A metal scraper ring and multiple heavy-duty wipers at the gland block powder and workshop dust. The main seal is a hydrolysis-resistant polyurethane/filled-PTFE composite for zero leakage over the full service life.

Internal Cushioning for Noise Reduction

Progressive cushions at both ends decelerate the cylinder at end positions, eliminating rigid impacts.

Maintenance-Free & Intelligent Monitoring

Self-lubricating composite bushings in the clevises eliminate greasing. A built-in displacement sensor can optionally provide real-time ejection stroke or platen position feedback for closed-loop control.

Special bore, rod, and stroke

High-temperature seals

Full stainless steel body and piston rod

Built-in displacement sensor

Explosion-proof / mining certifications