Mobile Workbench Cylinder

Bore diameter: Φ125 mm – Φ320 mm

Rod diameter: Φ90 mm – Φ220 mm

Stroke: ≤7,500 mm (per workbench travel distance)

Operating pressure: continuous 28 MPa, max 31.5 MPa

Max push force: 2,533 kN (at 31.5 MPa, Φ320 mm bore)

Max pull force: approx. 1,337 kN (at 31.5 MPa, Φ320 mm bore with Φ220 mm rod)

Breakaway pressure: ≤0.3 MPa

Piston velocity: 0.05 – 0.4 m/s (smooth traverse; higher speeds optional)

Operating frequency: intermittent, several cycles per forging batch

Internal leakage: ≤0.02 ml/min (at 28 MPa, over seal service life)

Temperature range: -25℃ to +120℃ (standard); -40℃ to +150℃ customizable

Suitable for: 5 MN–200 MN open-die forging presses, die-forging presses, multi-directional forging presses, etc.

Ultra-Long Stroke & Synchronized Positioning

Strokes span several meters. Built-in magnetostrictive displacement sensors (±0.05 mm repeatability) report absolute workbench position in real time. Working with servo hydraulic valves, multi-cylinder synchronized closed-loop control ensures the workbench moves smoothly over its full travel and locks precisely at the die-change or forging position, with no misalignment or impact.

High Thrust/Pull & Side-Load Resistance

The barrel and piston rod are crafted from high-yield quenched and tempered alloy steel, with FEA-optimized stress distribution. Wide bronze guide bushings with precision clearance control absorb radial forces from uneven workbench loading and side loads, preventing rod scoring and uneven guide wear for long-term reliability.

V-Pack Sealing, Long-Life & Easy Maintenance

A multi-layer V-ring polyurethane/fabric composite seal assembly with replaceable adjustment shims automatically compensates for compression set under sustained high pressure and high-frequency movement, maintaining zero external leakage. Seal replacement requires only gland removal, greatly reducing downtime.

Super-Nut Locking for Vibration Resistance

All tie-rod and side-cylinder fasteners utilize mechanical super-nuts that maintain a constant preload under the intense vibration of forging hammers, completely eliminating the risk of hydraulic leakage or workbench misalignment from bolt loosening.

Flexible Options: Booster Cylinder & Rotary Union

An optional integrated booster cylinder allows a significantly smaller bore while delivering the same force, reducing system cost. An optional high-pressure rotary union provides leak-free rotational freedom for piping, optimizing equipment layout.

Internal Cushioning & Noise Reduction

Progressive end-of-stroke cushions inside the cylinder automatically decelerate the piston and absorb impact energy, lowering noise and protecting the workbench, dies, and the cylinder itself.

Precision Manufacturing & Maintenance-Free Pivots

Critical components are precision CNC-machined to micron-level form tolerances. All pivot points feature self-lubricating bearings, eliminating the need for grease and ensuring long wear life even under heavy-duty traversing and frequent repositioning.

Special bore, rod, and ultra-long stroke

Built-in redundant displacement sensors

Booster cylinder and rotary union integration

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

Explosion-proof / mining certifications

Special mounting flanges, spherical bearings, and port configurations