Liebherr LB 20 - Manual (Page 6)

6 LB 20
0 10 20 30 40 50 60
BAT 230
0
36,878
73,756
110,635
147,512
184,390
0
36,878
73,756
110,635
147,512
184,390
0 10 20 30 40 50 60
BAT 230
lb
f-
ft
rpm
Effective Nominal
lb
f-
ft
rpm
Gearbox frame
Drive motors
Kelly bar
Shock absorber
Gearbox
Cardan joint
Casing driver
Rotary BAT 230 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 230
• 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