The Kelly bar is a drilling tool
It is one of the key components of bore drilling, as it extends the depth at which hydraulic rotary drilling rigs or excavators can drill. Telescopic kelly bars are collapsible to save space during storage or transport. When fully extended, Kelly Bars provide an extension to an excavator that increases the depth of a drilling hole.
A kelly bar consists of several hollow steel tubes of different diameters that are nested inside each other. The tubes are connected at the bottom by a square or hexagonal cross section, and at the top by a pin connection. The kelly bar is inserted into the drill string and held in place by friction between the walls of the Kelly bar and the drill string.
Tebco Kelly bars easily sustain the torque applied to the auger when drilling. Even at their full extended length our Kelly bars can sustain the maximum torque needed by your auger to drill to the depth required by project guidelines. This makes them safe to use even in situations requiring a lot of energy. The torque is transferred from the rotary drive to the drilling attachment.
The welding and manufacturing process of Tebco Kelly bars is by means of high quality materials and high quality manufacturing engineering. Our steel is provided with origin and quality certificates to guarantee long-life and reliability of the product after the manufacturing process.