Tunelmak Adroit 420AH

Tunelmak Adroit 420AH – 4×4 Articulated Shotcrete Machine

The Adroit 420AH adds articulation to the conventional 4×4 chassis design, delivering enhanced maneuverability and articulation in confined or curved tunnels. This machine is ideal for projects where tunnel alignment curves, restricted headings, or varying cross-sections challenge rigid-frame units.

Articulation enables the front and rear sections to pivot relative to each other, allowing better alignment along curves, smoother navigation through tight bends, and improved operator control over nozzle positioning. This flexibility is especially helpful in urban tunneling, metro lines, or geology-driven drift deviations.

Performance-wise, the 420AH retains high-pressure hydraulic systems for precise shotcrete delivery, consistent flow, and minimal rebound. The pump and spray components are engineered for reliability and long service life under intense conditions. The articulating frame does not compromise structural integrity — the machine is built to withstand stress concentrations and maintain alignment under load.

Operators benefit from remote nozzle control, intuitive instrumentation, and robust safety mechanisms. Maintenance is simplified with modular components, centralized access points, and a design that supports underground servicing.

In sum, the Adroit 420AH is ideally suited for complex tunnel geometries, offering a combination of agility, precision, and performance that rigid machines cannot match in tight or curved environments.