This shield cylinder series is designed for the front shield and finger shield of open-type tunnel boring machines (TBMs). It is a critical support element for stabilizing the cutterhead and preventing jamming caused by ground convergence. By actively gripping the tunnel wall or passively absorbing rock deformation, the cylinder provides rigid support and fine angular adjustment for the cutterhead, ensuring continuous boring without jamming in jointed, mixed-face, and high-stress hard rock formations. Built with a vibration-resistant structure, specialized sealing, and rock-dust protection, it delivers extremely high load capacity and fatigue life, operating reliably over long tunnels, deep overburdens, and high rock temperatures.

The thrust cylinder is the primary drive element of a shield machine’s propulsion system. Arranged in a circular array inside the tail shield, it pushes the entire machine forward by reacting against the assembled segmental lining ring. This series spans a complete range from compact to very large bore and ultra-long stroke, delivering over 8,300 kN of thrust per cylinder. With grouped zone control for steering and articulation, a super-rigid structure, specialized high-pressure sealing, integrated counterbalance valves, and displacement sensing interfaces, these cylinders provide stable, synchronized, zero-drift thrust in deep overburden, high water pressure, long-distance drives, intense vibration, and slurry environments — ensuring precise advance rate and tunnel axis control.

This articulated cylinder series is the core actuator for the articulation system of shield tunnel boring machines. Arranged circumferentially at the interface between the front and rear shield bodies, it performs a dual function: active steering and passive towing. In active mode, grouped differential cylinder extension tilts the front shield, enabling precise curve negotiation or cutterhead attitude adjustment (e.g., angular offset for tool changes). In passive mode, the cylinders extend synchronously with the thrust cylinders, smoothly pulling the tail shield forward while maintaining structural continuity between the shield sections. Covering a complete range from compact to very large bores, with high lateral load capacity, advanced grouped synchronous control interfaces, and reliable slurry protection sealing, the series ensures precise shield steering and structural safety under deep overburden pressure, continuous curves, and intense vibration.

This segment erector cylinder is the core actuator of the shield machine segment assembly system. It sequentially grasps, lifts, and precisely positions precast concrete segments within the tunnel to form complete lining rings. The cylinder features a unique two-stage telescopic design — the smaller inner piston rod remains fixed while the larger outer rod extends. The inner cylinder provides axial thrust and pull force, while the outer sleeve bears the substantial lateral forces and bending moments imposed by the segment weight, achieving an optimized “thrust/load-bearing separation.” Combined with high-rigidity guiding, multi-stage sealing, and an integrated counterbalance valve, it ensures smooth segment handling, precise positioning, and long-term reliability under frequent cycling, wet slurry conditions, and the confined tunnel environment.

This anti-torque cylinder series is a critical load-bearing component of the shield machine cutterhead drive system. Arranged circumferentially around the main bearing, it resists the massive instantaneous reaction torque generated during rock cutting, mixed-face excavation, and boulder impact, and transmits it steadily to the shield body. With an ultra-large bore, ultra-short stroke, and ultra-high pressure heavy-duty construction, combined with special high-pressure sealing and an integrated safety valve package, it ensures rigid, zero-displacement locking of the drive system under continuous alternating torque, severe vibration, and underground slurry conditions, safeguarding precise shield steering and equipment integrity.

This crusher cylinder is the core actuator in the crushing chamber of shield tunnel boring machines. It hydraulically opens and closes the crusher jaws (or toggle plate) to clamp and crush oversized cobbles, boulders, and rock fragments entrained in the excavated muck, reducing their size to prevent blockage of the slurry or discharge piping. Designed with a heavy-duty rigid structure, task-specific sealing, and comprehensive anti-corrosion treatment, it consistently delivers stable, leak‑free clamping force in the typical shield environment — high-pressure slurry, intense vibration, heavy abrasion, and confined space.

This luffing cylinder is the core actuator for the mast raising/lowering system on rotary drilling rigs. It smoothly tilts the mast from a horizontal transport position to a vertical working position, and allows fine adjustment of the distance between the mast and the base machine for precise site positioning. Designed with a high-rigidity heavy-wall structure, a unique double waterproof sealing system, and an integrated counterbalance valve, it delivers safe, steady, zero-drift mast luffing under extreme conditions of heavy load, slurry immersion, and continuous vibration — ensuring both transport and operational efficiency and safety.

This mast cylinder series is the core actuator for mast attitude adjustment on rotary drilling rigs. It drives mast luffing (fore-aft tilting) and correcting (left-right tilt adjustment), precisely setting the mast angle and orientation relative to the ground to ensure borehole verticality. With a large-scale heavy-duty design, a unique multi-stage waterproof sealing system, and an integrated counterbalance valve, it stably holds mast attitude under severe conditions of drilling vibration, slurry splash, and side-load impacts, ensuring hole accuracy and operational safety.

This feed cylinder (crowd cylinder) is the core actuator for the drilling feed system of rotary drilling rigs. It drives the power head (rotary drive) up and down along the mast guide rails while applying continuous, controllable crowd force to the drill string — directly determining penetration rate and borehole quality. Featuring an ultra-long stroke design (up to 9 meters or more), exceptionally high bending stiffness, and a precision sealed waterproof structure, it delivers stable, reliable feed and hoisting power under severe conditions of high drilling pressure, intense vibration, slurry immersion, and frequent reciprocating motion, ensuring safe and efficient deep-hole drilling.

This bucket cylinder series is designed for 20 to 80 metric ton medium and large hydraulic excavators. As the final actuator controlling bucket curl for cutting, loading, and dumping, it directly determines breakout force and cycle productivity. Built to a 35 MPa ultra-high pressure specification, it features high burst force, strong side-load tolerance, and excellent impact resistance. Integrated adjustable cushioning, large-flow dual ports, and a smart sensing interface ensure consistent, efficient output in extreme operations including overburden removal, rock excavation, and heavy-duty truck loading.

This boom cylinder series is engineered for 20 to 80 metric ton medium and large hydraulic excavators. As the core actuator for raising and lowering the boom, it directly determines maximum digging height, reach at dump, and heavy lifting capacity. Featuring a 35 MPa ultra-high pressure design, oversized bore, thick-walled barrel, integrated adjustable cushioning, large-flow dual ports, and smart sensor readiness, it delivers smooth, powerful motion and exceptional durability in the toughest applications such as overburden handling, heavy rock face digging, and deep trench work.

This stick cylinder series is purpose-built for 20–80 ton medium and large crawler excavators. Serving as the core hydraulic actuator for stick extension and retraction, it handles digging, loading, and dumping operations. With a 35 MPa ultra-high pressure design, thick-walled barrel, large-diameter piston rod, high-flow hydraulic control system, adjustable cushion valve, and intelligent sensor interface, it delivers robust force and low downtime in demanding applications such as overburden removal, heavy rock handling, and deep trench excavation.