Robbins 73 rigs are the sturdiest, most widely sold raiseboring rigs in the world. Reliable in a variety of applications, these medium-sized machines drill holes from 1.5 to 3.1 m (5-10 ft.) in diameter. Standard functions include anti-jamming, auto makeup and the gradual ramp-up of speed and torque. At Atlas Copco, we strive to construct high-quality machines that are easy to set up, operate and maintain – and our Robbins 73 rigs are no exception. Robbins 73 machines are built to serve and built to last.