Liebherr LB 28 - Manual (Page 6)

6 LB 28
Rotary BA 280 with shock absorber
Gearbox frame
Drive motors
Casing driver
Cardanic joint
Kelly bar
Shock absorber
Gearbox
0
50
100
150
200
250
300
350
0 10 20 30 40 50 60
Tor
que [kNm]
Speed [rpm]
BA280
Gear 1
Gear 2
• 2-stage-gear drive for flexible adaptation to soil conditions
• Due to stepless speed control via joystick optimum and precise
alignment and rock drilling is possible even at low speed levels;
it is not required to preselect an operating mode
• Kelly shock absorber and rubber bearing relieve the material and
reduce noise emission
• Thanks to the Kelly shock absorber the Kelly bar is guided at
greater length
• Various drive adapters provide compatibility with other systems