Liebherr LRB 125 XL - Manual (Page 3)

3
Double rotary drilling
Equipment technology
Double rotary drives
Model Max. speed Max. torque
Max. relative
adjustment
Casing Auger Casing Auger
DBA 80
on LRB 125 450 kW
18 / 36 rpm 24 / 48 rpm 80 / 40 kNm 60 / 30 kNm +/- 150 mm
DBA 200
on LRB 155 450 kW
7 / 14 rpm 15 / 30 rpm 196 / 98 kNm 98 / 49 kNm +/- 150 mm
DBA 300
on LRB 255 670 kW
10 / 23 rpm 14 / 29 rpm 300 / 128 kNm 150 / 72 kNm +/- 350 mm
Because of their high engine power, the carrier
machines of the LRB-series are especially suitable for
pile production with double rotary drilling.
The double rotary drives DBA 80, DBA 200 and
DBA 300 have sliding cylinders for the relative
adjustment of casing and auger. This means that the
casing can either run ahead of the auger to prevent
cave-in, or the auger can drill ahead as a pilot to break
up hard soil.
Application limits*
Carrier machine, rotary drive Max. drilling depths Max. drilling diameter
LRB 125 with DBA 80 approx. 13 m 610 mm
LRB 155 with DBA 200 approx. 17 m 750 mm
LRB 255 with DBA 300 approx. 18 m 900 mm
* Depending on soil conditions.