The B29 is a compact, economical solution for drillers looking to do auger and mud rotary work, along with SPT borings, shelby tube samples and rock cores. The B29 “Investigator” drill mounts easily on compact rubber tracks or a non-CDL truck chassis. 4,200 foot-pounds of torque and 770 rpm delivered by a four-speed rotary head assure (SPT) test borings and rock cores are recovered efficiently at a lower cost than with larger rigs. 800-766-3745.