The BG-40 is a hydraulic top drive drilling rig with a single rotary head. This rig produces 293,000 ft-lbs of torque. With a weight of 340,000 lbs., this machine provides the torque and crowd to allow penetration into the hardest geologic formations. With its complement of specialized drill tools this rig easily drills through cobbles and boulders, caliche, and soft to medium rock.

The machine is capable of drilling 2.8M shafts up to 118 ft in depth utilizing a fully interlocking telescoping Kelly.

Malcolm Drilling has nine of these machines in its fleet.