The McL-48/54 auger boring system develops 475 tons at 5,000 psi forward thrust and 170,000 ft.-lbs. peak auger torque in 1st gear. Cased boring sizes range from 16 to 54 inches in diameter. The power train includes a 162-hp turbocharged diesel, five-speed transmission with reverse, and planetary reduction final drive to the 4-inch hex chuck. Its low profile is only 32½ inches to the bore centerline.