4-element interlocking Kelly Bar

Ability to manufacture friction, interlocking and combined Kelly bar, and customize tubes series for Kelly bars on demand of customers
Advanced processing equipment and tooling facilities to ensure the high wear resistance and high reliability of Kelly bar
Selection of steel tubes and keys for power head manufactured by domestically renowned steel mills and adoption of special heat treatments process to reduce the weight of Kelly bar as a whole while guarantee the strength of Kelly bar  
Complete type spectrum and flexible designing and manufacturing capacities to ensure that Kelly bars are perfectly suited for the demand of customers.

Interlocking Kelly bars (also called as interlocking bars) are generally suitable for hard soils conditions, such as cobbles, rocks, etc. We are now capable of manufacturing 3-element, 4-element and 5-element interlocking Kelly bars, among which 5-element interlocking Kelly bar is firstly manufactured by domestic manufacturer. With the most mature manufacturing technology, 5-element interlocking Kelly bar has been successfully applied for XCMG550, TR550, SWDM520, XCMG400, TR460, XCMG360, SWDM360, TR280 drilling rig, etc., which effectively addresses the problem of deep hole rock drilling.