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.