Kelly Drives

Product Overview

The equipment shown is a Kelly Drive / Kelly Bar system component used in rotary drilling and foundation piling operations. Its primary function is to transmit high torque and downward crowd force from the drilling rig's rotary drive or table down to the drilling tool (such as augers, drilling buckets, or core barrels).

Technical SpecificationsParameterRange / CharacteristicMaterial ConstructionHigh-strength alloy steel (e.g., 35CrMo, Q550, or Q355B)Telescopic Sections2 to 6 elements (concentric tubular sections)Torque Capacity80 kNm – 500+ kNmMaximum Drilling Depth10 m – 110 mDrive InterfaceSquare or hexagonal Kelly stub / box (e.g., 130×130 mm to 200×200 mm)Rig CompatibilityBauer, Soilmec, Casagrande, SANY, XCMG, Zoomlion, IMT, MAIT, Liebherr