Atlantic Robotic Spray Arm RSA 500 is the ideal shotcreting system for large and medium tunnels, mines, caverns and high slopes. It offers the flexibility of spraying pre-mixed wet shotcrete and dry gunite, with steel fibre concrete and polypropylene fibre concrete. With sophisticated engineering, the equipment has a compact design, small turning radius, rigid chassis, heavy duty off-highway axles, four wheel drive and four wheel steering, thus making it flexible to work in narrow tunnels and meet the toughest conditions on any jobsite. RSA 500 Robotic Spray Arm RSA 500 - Key Features: Suitable for working in tunnels and open slopes with a vertical spraying reach of 17 m. Rigid chassis with heavy duty off-road axles. Diesel engine for transport mode and electric motor for pumping and spraying. Power cable drum with 60 m long cable (100 m Optional). 4-wheel drive and 4-wheel power steering with crab mode for easy maneuverability. Bi-directional travel with 180° swivel for the driver’s seat and steering wheel to face either direction of travel. Onboard Air Compressor for fully automated spraying operation. Built-in Dosing System, suitable for all liquid additives with automatic synchronization between the concrete pump and chemical dosing unit. Built-in High Pressure Water Pump and Water Tank for easy cleaning of the equipment