DELMAG rotary heads can be used with a Kelly bar to drill cased and non-cased piles, with a CFA auger or with part and full displacement tools.
The characteristics of the patented DELMAG DDK-System (Double Rotary Head) compared to conventional double rotary head systems are that the upper rotary head (auger drive) can be moved independently from the lower rotary head (casing drive).
For augering operations direct against adjacent structures (contiguous type, tangential, secant and on-the-wall), also in use for soilmix applications.