This parallel cylinder serves as a follow-up actuator within the drilling boom's parallel linkage mechanism. As the main boom is raised or lowered, the cylinder automatically extends or retracts to compensate for geometric changes, keeping the feed beam and rock drill in a perfectly parallel attitude at any height. This eliminates the need for secondary angle correction and significantly improves drilling parallelism and efficiency during full-face tunneling. Covering a bore range from 63 mm to 200 mm with strokes up to 3 meters, and featuring ultra-low-friction seals, high-capacity guidance, and internal cushioning, it delivers precise, stick-slip-free follow-up motion under harsh conditions of dust, vibration, and moisture.

This front support cylinder serves as a critical stabilization actuator, mounted in pairs at the front corners of the undercarriage. Before drilling, it forcefully extends its piston rod downward to press large stabilizer pads firmly against the ground, providing rigid anchoring for the machine's front section. It eliminates body sway caused by tyre deflection and drilling recoil, creating an absolutely stable platform for the boom. Covering a full bore range from 63 mm to 200 mm with a maximum thrust of 785 kN, and featuring integrated hydraulic locks, high-strength alloy steel, and multi-stage dust protection, it delivers permanent, leak-free rigid support under aggressive underground conditions — a cornerstone for precise and safe drilling.

This boom cylinder is the core power element of the drilling boom system in drilling jumbos, mounted between the carrier chassis and the front main boom. It hydraulically raises and lowers the entire boom with powerful thrust, precisely lifting the feed beam and rock drill to any height on the tunnel face for full-face drilling coverage. Covering a full bore range from 63 mm to 200 mm, with strokes up to 3,000 mm and thrust up to 628 kN, it meets the lifting force requirements of both medium and heavy drilling jumbos. Combined with a high-strength alloy steel barrel, a precision hard-chrome plated piston rod, multi-stage combination seals, and bidirectional cushioning, it provides stable, reliable, leak-free lifting motion under the severe conditions of underground high dust, intense vibration, and frequent cycling — a core component for ensuring efficient drilling coverage and construction safety.

This rotation cylinder is the core actuator of the boom rotation system in drilling jumbos, mounted between the boom base and the slewing platform. It extends and retracts its piston rod, and through a rack-and-pinion or linkage mechanism converts the linear motion into rotary motion, smoothly rotating the entire boom around the vertical or horizontal axis for precise positioning of blast holes across the full tunnel face. Covering a full bore range from 63 mm to 200 mm, with strokes up to 3,000 mm and thrust up to 942 kN, it meets the driving force requirements of both medium and heavy drilling jumbos. Combined with a high-strength alloy steel barrel, a precision hard-chrome plated piston rod, multi-stage combination seals, and bidirectional cushioning, it provides stable, precise, leak-free rotary drive under the severe conditions of underground high dust, intense vibration, and frequent rotation — a key component for ensuring efficient drilling coverage.

This canopy lift cylinder is a key actuator of the safety protection system in underground drilling jumbos, mounted on the canopy frame above the operator’s cabin or working platform. It extends and retracts to smoothly raise or lower the protective canopy, providing reliable overhead protection against falling rock and dripping water during drilling operations, and lowering the canopy for transport to meet tunnel clearance requirements. A compact long-stroke design (700 mm stroke) delivers up to 50 kN of thrust. Combined with a high-strength alloy steel barrel, a precision hard-chrome plated piston rod, multi-stage dust-proof seals, and bidirectional cushioning, it provides stable, reliable, leak-free lifting motion under the severe conditions of underground high dust, humidity, and frequent cycling — an essential component for operator safety in tunneling operations.

This boom traverse cylinder is a key actuator of the drilling boom lateral positioning system in underground drilling jumbos, mounted at the boom base slewing platform or transverse slide. It extends and retracts to swing the entire boom horizontally left and right, enabling rapid lateral positioning for full-face drilling coverage. Compared to the chassis jack cylinders, this model features a longer stroke (550 mm) and is specifically designed for boom lateral coverage. A compact double-acting design delivers up to 282 kN of thrust. Combined with a high-strength alloy steel barrel, a precision hard-chrome plated piston rod, multi-stage dust-proof seals, and bidirectional cushioning, it provides stable, precise, leak-free traverse motion under the severe conditions of heavy dust, intense vibration, and narrow drift environments — a key component for enhancing drilling efficiency and face coverage.

This cross-extension cylinder is a key actuator of the drilling boom lateral adjustment system in underground drilling jumbos, mounted at the boom telescopic section or transverse slide. It extends and retracts to smoothly move the boom or feed beam horizontally, expanding or retracting the drilling coverage area so that the jumbo can drill the full tunnel face from a single parking position without frequent repositioning. A compact double-acting design delivers up to 72 kN of thrust. Combined with a high-strength alloy steel barrel, a precision hard-chrome plated piston rod, multi-stage dust-proof seals, and bidirectional cushioning, it provides stable, precise, leak-free lateral extension motion under the severe conditions of heavy dust, intense vibration, and narrow drift environments — a key component for enhancing drilling efficiency and face coverage accuracy.

This steering cylinder is a key actuator of the chassis steering system in underground drilling jumbos, mounted in pairs at the front/rear axles or articulated steering linkage. It extends and retracts to push the steering knuckles or articulation points, achieving precise wheel deflection or chassis articulation, giving the jumbo excellent maneuverability and mobility in narrow tunnels and drifts. An ultra-high-pressure double-acting design (rated 25 MPa) delivers up to 384 kN of thrust. Combined with a high-strength alloy steel barrel, a precision hard-chrome plated piston rod, multi-stage dust-proof seals, and bidirectional cushioning, it provides stable, precise, leak-free steering response under the severe conditions of heavy loads, high dust, intense vibration, and inclined operation — a key component for safe, efficient travel and accurate positioning of drilling jumbos.

This jack cylinder is a key actuator of the chassis stabilization system on underground drilling jumbos. Mounted in pairs under the front and rear of the carrier, it extends its piston rod forcefully downward before drilling begins. The support pads contact the ground and rigidly lift the machine slightly, eliminating the elastic bounce of tyres and suspension, providing an absolutely rigid platform for the boom to drill from. With a heavy-thrust design (up to 282 kN), a high-strength alloy steel barrel, a precision hard-chrome plated piston rod, multi-stage dust seals, and a load-holding lock valve, it maintains leak-free, stiff support on inclines, in loose rock, and under severe impact vibration — a core component for ensuring drilling accuracy and operational safety.

This pitch cylinder is a key actuator of the drilling boom attitude adjustment system in tunneling drilling jumbos, mounted at the articulation between the boom tip and the feed beam. It extends and retracts to tilt the feed beam up and down, enabling precise pitch angle positioning of the rock drill for accurate hole alignment. A compact medium-stroke design (410 mm stroke) delivers 196 kN of thrust at 25 MPa. Combined with a high-strength alloy steel barrel, a precision hard-chrome plated piston rod, multi-stage dust-proof seals, and bidirectional cushioning, it provides stable, reliable, leak-free pitch motion under the severe conditions of high pressure, heavy dust, intense vibration, and cyclic operation — a key component for drilling accuracy and smooth blasting quality.

This compensation cylinder is a key auxiliary actuator of the drilling boom feed system in tunneling drilling jumbos, typically mounted between the boom tip and the feed beam base. Through its long-stroke hydraulic extension and retraction, it precisely compensates for the distance between the feed beam and the tunnel face, ensuring the rock drill maintains firm contact and advances evenly throughout the entire drilling cycle. Featuring a small-bore, long-stroke design (up to 1,800 mm), combined with specially chosen high-capacity guide rings and low-friction composite seals, it delivers smooth, stick-slip-free, low-leakage linear motion under the conditions of long cantilever projection, high-frequency reciprocation, and intense vibration impact — making it a core component for accurate drilling depth and borehole quality.

This boom parallel lift cylinder is a key auxiliary actuator of the drilling boom positioning system in tunneling drilling jumbos. Mounted within the parallel linkage mechanism of the boom, it extends or retracts in synchronization with the main boom cylinder to compensate for angle changes, ensuring that the feed beam and rock drill remain parallel to their original attitude during the entire lifting or lowering sequence. This parallel hold function eliminates the need for secondary angle correction, enabling fast, high-precision full-face parallel drilling. Constructed with high-strength alloy steel, a precision hard-chrome plated piston rod, low-friction combination seals, and bidirectional cushioning, it delivers sensitive, low-leakage follow-up compensation motion under high vibration and heavy dust conditions — a core component for overbreak control and smooth blasting quality.