This boom telescopic cylinder is an extension actuator of the drilling boom system in underground bolting jumbos, mounted inside the main boom or on the telescopic slide between the boom and the feed beam. After the boom is positioned vertically, it hydraulically extends or retracts the boom horizontally, moving the feed beam and rock drill toward or away from the rock face, rapidly adjusting the drilling distance and expanding the bolting coverage from a single parked position. A long-stroke design (800 mm stroke) delivers up to 45 kN of thrust at 23 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, precise, leak-free linear motion under the severe conditions of underground high dust, intense vibration, and frequent telescoping — a key component for enhancing the work efficiency and full-face coverage capability of bolting jumbos.

This canopy lift cylinder is a key actuator of the safety protection system in underground bolting 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 anchor bolt drilling and mesh installation, 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 bolting operations.

This boom cylinder is the core power element of the drilling boom system in underground bolting 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 anchoring height on the roadway roof and sidewalls for full-face anchor bolt drilling and installation. An ultra-high-pressure heavy-duty design (rated 22 MPa) delivers up to 339 kN of lifting force from a compact bore, easily handling the combined weight of the boom, feed beam, and rock drill. 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, intense vibration, and frequent cycling — a core component ensuring efficient bolting support and construction safety.

This cylinder is an actuator of the feed beam attitude adjustment system in underground bolting jumbos, mounted in the rotation or side-swing mechanism between the feed beam base and the boom. After the boom is positioned, it hydraulically rotates or swings the feed beam around its longitudinal axis, enabling the rock drill to bore anchor bolt holes at various incident angles, covering multiple anchoring positions on the roadway roof and sidewalls. A double-acting medium-stroke design (475 mm stroke) delivers up to 80 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 rotary/swing motion under the severe conditions of underground high dust, intense vibration, and frequent adjustments — a key component for ensuring bolting coverage and drilling accuracy.

This mesh handler telescopic cylinder is a key actuator of the roof protection system in underground bolting jumbos, mounted on the mesh manipulation arm at the front of the machine. After anchor bolts are installed, it extends or retracts over a long distance using low hydraulic pressure, accurately pulling and pushing the rolled or sheet metal safety mesh firmly against the exposed roof, significantly reducing the manual labor intensity and safety risks of mesh installation. An ultra-low-pressure, long-stroke design (up to 800 mm stroke), combined with a lightweight barrel, precision hard-chrome plated piston rod, low-friction seals, and dust-proof system, ensures long-term, smooth, stick-slip-free telescopic motion under the severe conditions of underground humidity and heavy dust — a key component for enhancing roadway support efficiency.

This cylinder is an auxiliary actuator of the boom positioning system in underground bolting jumbos, mounted in the compensation mechanism between the main boom and the feed beam. After the boom has been roughly positioned, it provides fine forward/backward adjustment to precisely bring the feed beam and rock drill into contact with the rock face, or to provide stable axial support during drilling. A double-acting medium-stroke design (191 mm stroke) delivers up to 85 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 linear motion under the severe conditions of underground high dust, intense vibration, and frequent compensation — a key component for ensuring anchor bolt drilling accuracy and equipment reliability.

This limit cylinder is a key safety element of the boom and feed beam positioning system in underground bolting jumbos. Mounted at the mechanical stops of joints or slides, it extends its piston rod to place a solid mechanical block into the working position, physically restricting unwanted degrees of freedom (such as excessive pitch or lateral swing) to prevent structural interference or mechanical over-travel. An ultra-compact short-stroke design delivers up to 18 kN of thrust. Combined with a high-strength carbon steel barrel, a precision hard-chrome plated piston rod, and multi-stage dust seals, it maintains an absolutely stable mechanical end-stop under high-frequency vibration and high-pressure water spray in underground conditions — an essential safety component for ensuring the reliable operation of bolting jumbos.

This feed beam tensioning cylinder is a key auxiliary element of the feed system in underground bolting jumbos. Mounted on the tensioning mechanism, it applies a constant hydraulic force via a small piston stroke, keeping the drill feed chain (or steel belt) under precise tension despite high-frequency impacts. An ultra-compact micro-stroke design (55 mm stroke) delivers up to 18 kN of thrust. Combined with a high-strength barrel, precision hard-chrome plated piston rod, multi-stage seals, and bidirectional cushioning, it maintains reliable automatic tensioning in dusty, humid, and high-vibration environments — a core component for ensuring drilling accuracy and extending chain service life.

This pitch cylinder is a key actuator of the drilling boom attitude adjustment system in bolting jumbos, mounted at the articulation point 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 anchor bolt installation at the designed angle to achieve optimal reinforcement of the surrounding rock. A compact medium-stroke design (514 mm stroke) delivers 173 kN of thrust at 22 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, precise, leak-free pitch motion under the severe conditions of underground high dust, humidity, and intense vibration — a key component for ensuring bolting quality and construction safety.