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Specifications �
®
Cat
MD6640 �
Rotary Blasthole Drill
Mainframe Components
Air Compressor with Unloader Package
Oil-Flooded Screw Compressor and Constant Volume Oil Pump
for Optimized Cooling
Standard 85 m
Optional 108 m
Leveling Jacks (4)
Automatic leveling system Standard
Jack Size - Rear 229 mm (9 in) diameter x
Jack Size - Front 229 mm (9 in) diameter x
(2) positioned outside mast at rear and (2) positioned outside frame at front
Lubrication
Automatic PLC Centralized Standard
Drilling
Hole Diameter
Hole Depth
3
/min (3000 cfm)
free air, 4.5 bar (65 psi)
3
/min (3800 cfm)
free air, 4.5 bar (65 psi)
1 676 mm (66 in) stroke
1 676 mm (66 in) stroke
(9.625 – 16 in)
244 – 406 mm
19.81 m (65 ft)
Lower Works
Crawler Mounting
Heavy-duty with Excavator-style Sprocket Drive Links
Dual Axles Fixed Rear & Pivitable Front
Overall Length 7.29 m (23 ft 11 in)
Overall Tread Width - Standard 6.25 m (20 ft 6 in)
Tread Widths - Standard 914 mm (36 in)
Ground Bearing Pressure 113 kPa (16.4 psi)
Optional Wide Links 1 067 mm (42 in)
Ground Bearing Pressure 96.5 kPa (14 psi)
Total effective bearing area 64 m2 (689 ft2)
(3 556 mm treads) 221 kPa (32.1 Psi)
Propel
Chainless Hydraulic Drive, Standard
Counter-rotating Tracks,
Crawler-mounted Disc Brakes
and Tow Brake Release
Propel Speed 1.45 km/h (0.9 mph)
Operating Propel Guide
Gradeability 80%
2
25%
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Rotary Blasthole Drill—MD6640 �
Optimal Working Ranges �
A Overall height w/mast for
65’ single pass 31.22 m (102 ft 5 in)
B Height to top of handrails on
operator cab 5.64 m (18 ft 6 in)
C Groundline to top of deck 1.93 m (6 ft 4 in)
D Groundline to bottom of rear
jack pads 0.61 m (2 ft)
E Groundline to top of machinery
house roof 4.60 m (15 ft 1 in)
F Overall width of machine 7.24 m (23 ft 9 in)
F
Centerline of machine to LH side 3.61 m (11 ft 10 in)
1
F2 Centerline of machine to RH side 3.63 m (11 ft 11 in)
G Centerline of machine to LH outside
edge of 914 mm (36 in) tracks 3.17 m (10 ft 5 in)
G1 Centerline of machine to RH outside
edge of 914 mm (36 in) tracks 2.92 m (9 ft 7 in)
H Centerline of machine to centerline
of LH rear leveling jack 2.29 m (7 ft 6 in)
H1 Centerline of machine to centerline
of RH rear leveling jack 2.21 m (7 ft 3 in)
I Centerline of hole to centerline of
equalizer jack 127 mm (5 in)
J Height to top of machinery house
pressurizing unit 5.05 m (16 ft 7 in)
K Height to top of cable reel
(optional) 3.07 m (10 ft 1 in)
L Groundline to bottom of front
jack panels 0.63 m (2 ft 1 in)
M Diameter of jack pads 1.12 m (3 ft 8 in)
N Centerline of hole to centerline
of rear jacks 400 mm (15.75 in)
O Overall length of crawlers 7.29 m (23 ft 11 in)
P Centerline of hole to rear of
operator’s cab 3.10 m (10 ft 2 in)
Q Centerline of rear jacks to
centerline of front jacks 11.02 m (36 ft 2 in)
R Overall length of machine 14.73 m (48 ft 4 in)
S Overall length of machine
with optional cable reel 16.97 m (55 ft 8 in)
T Overall length of machine w/mast
for 65’ single pass drill depth mast at rest 31.24 m (102 ft 6 in)
U Groundline to high point w/mast
for 65’ single pass drill depth -
mast at rest 9.88 m (32 ft 5 in)
Weight*
Working Weight 154 224 kg
(340,000 lbs)
* Type and number of options will affect machine weight.
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Rotary Blasthole Drill—MD6640 �
Bailing Velocities: 15.5º C (60º F) @ Sea Level
Diameter Nominal Compressor Rating - m3/min (icfm)
Hole Pipe 84.9 (3,000) 107.6 (3,800)
cm in cm in m/min fpm m/min fpm
25.1 9.875 17.8 7 3 450 11,300 4 378 14,359
27.0 10.625 19.4 7.625 3 050 10,000 3 879 12,724
31.1 12.25 21.9 8.625 2 200 7,300 2 807 9,206
31.1 12.25 23.5 9.25 2 600 8,500 3 293 10,800
34.9 13.75 27.3 10.75 2 300 7,500 2 890 9,478
38.1 15 32.4 12.75 2 700 8,800 3 402 11,157
38.1 15 34.0 13.375 3 650 11,900 4 606 15,108
40.6 16 32.4 12.75 1 800 5,900 2 273 7,456
40.6 16 34.0 13.375 2 150 7,100 2 754 9,034
Recommended Bailing Velocity Range: 1,524 - 3,658 m/min (5,000 - 12,000 fpm)
Mast Components
Mast
Standard mast for drill pipe
& one pipe rack 19.81 m (65 ft)
Computer analyzed, HD tubular lattice construction with
back braces
Raising and Lowering (2) 228.6 mm (9 in diameter
Angle Hole Drilling
hydraulic cylinders
1
25˚ off vertical in 5˚ increments
Hoist/Pulldown
Chainless rack and pinion system driven by head-mounted
excavator grade DC motor
Bit Loading Up to 63 975 kg (to 141,000 lbs)
Feed Rate Up to 7.62 m/min (to 25 fpm)
Hoist Rate Up to 22.86 m/min (to 75 fpm)
Lowering Rate Up to 22.86 m/min (to 75 fpm)
Electronic Depth Indicator Standard
Auxiliary Winch -
Std. Capacity 4 536 kg (to 10,000 lbs)
Pipe Racks
Single Rack 0.31 m (13.375 in) OD
pipe 25 mm (1 in) wall thickness Standard
Optional Rack Congurations and Max. Drill Pipe Diameter
2 Pipe Racks Max. diameter may vary.
3 Pipe Racks Max. diameter may vary.
4 Pipe Racks Max. diameter may vary.
Rotary Drive
Rotary Drive - DC motor 145 kw (195 hp) @ 475V
Bit Maximum Speed 125 rpm
Cat Shock Coupling Standard
Electrical
Equipment
Static DC Variable Output
Power Requirements
Voltage
3
3 Phase, 60 Hz, 4,160V
Main Electrical Systems
Air Compressor/AC Induction Motor
Dual Shaft - 448 kw (600 hp) @ 4,160V
Standard available for 85 m
Optional 597 kw (800 hp) @ 4,160V
Hoist/Pulldown - DC Motor 97 kw (130 hp) @ 475V
Main Hydraulic Oil Pumps - 186.4 kw (250 hp) @ 460V
Driven from Main Air
Compressor Motor Nominal
Machinery House Pressurization - 15 kw (20 hp) @ 460V
@ 529 m3/min (18,700 cfm)
Operator Cab Pressurization with
Heater and Air Conditioner Standard
Hydraulic Oil Cooler Fan 4 kw (5 hp)
Drive Transformer 3 Phase, 425 KVA Dry-Type
Transformer, Auxiliary 3 Phase, 250 KVA Dry-Type
Lighting 120/240V
Windshield Wipers Upper and Lower Front Standard
1
2
3
With optional angle hole equipment.
Stability limitations apply.
For alternate power congurations consult Caterpillar.
3
/min
(3,000 cfm) compressor
available for 108 m3/min
(3,800 cfm) compressors
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Rotary Blasthole Drill—MD6640 �
Leveling Jack,
Left Rear
Jack Pad
L.H. Pipe Rack
Deck
Bushing
C
Machine
L
and
Deck Bushing
Operator’s
Cab
Operator’s
Seat
Pipe Thread
Lubricators
Tool Wrench
C
Deck Bushing
L
R.H.
Pipe Rack
Auxiliary
Console
Jack Pad
Components
1. Bit Viewing Hatch - Hydraulic Operated
2. Hydraulic Breakout Wrench (optional)
3. Tipton Dry Dust Control (optional)
4. Leveling Jack (4)
5. Service Platform
6. Water Injection Dust Control 3,785 L (1,000 gal)
7. Hydraulic Oil Cooler & Guard
8. Transformers
Mast
Main
Air
Pipe
A-Frame
Leveling Jack,
Right Rear
Dust Collector
Hydraulic
Oil Tank
Hydraulic
Oil Cooler
Electro/Hydraulic
Valves
Hydraulic Pumps
and Gearcase
Hi-Voltage
Disconnect
Auxiliary
Transformer
Hi Voltage
Compressor
Start
Cabinet
Main Air Compressor
& Filter Assembly
Main Drive
Walkway, Right
9. Compressor Oil Cooler
10. Heated & Insulated Cooler Compartment
(optional)
11. Cable Reel (optional)
12. Boarding Stairs
13. Main Air Compressor Package
14. Main Drive Motor
15. Hydraulic Pumps & Gearcase
16. Pipe Racks - 1 Standard (2-4 optional)
Main Lightning
Transformer Arresters
Low Voltage
Cabinet
Butterfly Valve
Motor
Compressor Oil Cooler and Radiator
Programmable Rotary Drive Hoist/Pulldown
Controller Control Drive Control
Cabinet Cabinet Cabinet
House Ventilation Filter & Fan
Main Air
Lubricator
Separator
Boarding Stairs
17. Operator’s Cab
18. Hydraulic Oil Reservoir
19. Electro/Hydraulic Valves
20. Air Compressor Motor Control Center (MCC)
21. Low Voltage Motor Control Center (MCC)
22. Programmable Controller (PLC)
23. Rotary Drive Control Cabinet
24. Hoist/Pulldown Drive Control Cabinet
25. Auto-Lube System
Service
Ladder
Leveling Jack,
Left Front
Jack Pad
Loadcenter
Bit
Jack Pad
Leveling Jack,
Right Front
Auto Lube
Reservoir
Front of Machine
Options
18.3 m (60 ft) or 21.3 m (70 ft) Masts
Angle Hole Drilling
Automatic Fire Suppression Systems
Cold Weather Options
Dry Dust and Water Injection Dust Control Systems
Dust Curtains
Remote Propel
Additional options to meet customer’s needs.
For more complete information on Cat products, dealer services, and industry solutions,
visit us on the web at mining.cat.com and www.cat.com
© 2012 Caterpillar Inc.
All rights reserved
CAT, CATERPILLAR, their respective logos, “Caterpillar Yellow” and the “Power Edge” trade
dress, as well as corporate and product identity used herein, are trademarks of Caterpillar and
may not be used without permission.
Front Tow Bar / Rear Tow Hooks
GPS Interface
Hydraulic Breakout Wrench (controlled from operator’s control console)
Hydraulic Drive Cable Reels
Optional 3,800 cfm Compressor
Programmed Drill Control
Quick-Fill System for Oils and Lubricants
AEHQ6544