The BG-28 is a hydraulic top drive drill similar to the BG-40. It has a weight of 215,000 lbs. and a torque output of 203,000 ft-lbs. With its smaller size it is utilized in more confined situations. This rig is capable of drilling a maximum diameter of 1.8 M with a depth of 131 ft.

This rig is particularly suited for use with soil mixing, soil cutter work, and augercast piles. Its integral computer system allows for precise disbursement of grout with drill tool advancement and withdrawal.