Liebherr LB 28 - Manual (Page 7)

LB 28 7
Kelly drilling
Technical data
Drilling drive - torque 1 st gear 286 kNm
Drilling drive - speed 1 st gear 30 rpm
Drilling drive - torque 2 nd gear 148 kNm
Drilling drive - speed 2 nd gear 59 rpm
Performance data
Max. drilling diameter* 1900 mm uncased
Max. drilling diameter* 1500 mm cased
Display for Kelly drilling
A
1900
X
*) Other drilling diameters available on request.
Other Kelly bars available on request.
When using a casing oscillator, value X has to be reduced
by 1500 mm.
Kelly bars
A X Drilling
depth
Weight Kelly Ø
(mm) (mm) (m) (t) (mm)
MD 28/3/24 9880 11500 22 5.0 419
MD 28/3/27 10880 10500 25 5.45 419
MD 28/3/30 11880 9500 28 5.9 419
MD 28/3/33 12880 8500 31 6.35 419
MD 28/3/36 13880 7500 34 6.8 419
MD 28/4/36 11450 9900 34 7.25 419
MD 28/4/42 12950 8400 40 8.1 419
MD 28/4/48 14450 6900 46 8.95 419
MD 28/4/54 15950 5400 52 9.8 419