Liebherr LB 28 - Manual (Page 8)

8 LB 28
Gearbox frame
Drive motors
Kelly bar
Shock absorber
Gearbox
Cardan joint
Casing driver
Rotary BAT 320 with shock absorber
Automatic gearbox for best operating comfort
• No stopping required to change gears
• No interruption of the drilling process
• Automatic torque adjustment
• Continuous optimization of speed
• Four electronically adjustable speed ranges
Highest availability through easy set-up
• No mechanical shift gearbox
• Higher availability thanks to less moving parts
• Less maintenance required
Rotary BAT 320
• No pressure lubrication necessary
• No interferences through defective lubrication pump
• Simplified hydraulics
• Lower risk of hydraulics leakages
Flexibility through modular design
• Exchangeable drive adapters for use of other Kelly bars
• Exchangeable cardan joint for other casing drivers
• Quickly exchangeable equipment for other methods of operation
0 10 20 30 40 50 60
BAT 320
0
11,240
22,481
33,721
44,962
56,202
67,443
78,683
0
11,240
22,481
33,721
44,962
56,202
67,443
78,683
0 10 20 30 40 50 60
BAT 320
rpm
lb
f-
ft
rpm
lb
f-
ft
Nominal Effective