MD6640 Rotary Drill

Specifications

Bit Load

up to 64 000 kg (up to 141,096 lb)

Hole Diameter

244 - 406 mm (9.6 - 16 in)

Engine

AC Induction Motor - Dual Shaft 522-746 kW (600 hp)

Multi-Pass Hole Depth

Up to 85.3 m (280 ft)

Single-Pass Hole Depth

18.3 - 21.3 m (60 - 70 ft)

Working Weight

339512.0 lb

Rated Capacity

Hole Depth – Depth Multi-pass

Up to 42.7 m (Up to 140 ft)

Hole Depth – Depth Multi-pass

Up to 39.6 m (Up to 130 ft)

Hole Depth – Depth Single-pass

65.0 ft

Hole Depth – Depth Single-pass

70.0 ft

Hole Diameter

Up to 406 mm (Up to 16 in)

Mainframe Components – Air Compressor with Unloader Package

Oil-Flooded Screw Compressor and Constant Volume Oil Pump for Optimized Cooling – Optional

108 m3/min (3,800 ft3/min) free air, 4.5 bar (65 psi)

Oil-Flooded Screw Compressor and Constant Volume Oil Pump for Optimized Cooling – Standard

85 m3/min (3,000 ft3/min) free air, 4.5 bar (65 psi)

Mainframe Components – Leveling Jacks (4)

Automatic Leveling System

Standard

Jack Size – Front

229 mm (9 in) diameter × 1676 mm (66 in) stroke

Jack Size – Rear

229 mm (9 in) diameter × 1676 mm (66 in) stroke

Note

(2) positioned outside mast at rear and (2) positioned outside frame at front

Mainframe Components – Lubrication

Automatic PLC Centralized

Standard

Lower Works – Crawler Mounting

Dual Axles

Fixed Rear and Pivotable Front

Overall Length

22.5 ft

Overall Width – Standard

19.95 ft

Shoe Widths – Optional Wide Shoes

1.34 in

Shoe Widths – Optional Wide Shoes: Ground Bearing Pressure

17.4 psi

Shoe Widths – Standard

35.43 in

Shoe Widths – Standard: Ground Bearing Pressure

20.3 psi

Total Effective Bearing Area (Standard shoes)

130.0 ft2

Type

Heavy-duty with Excavator-style Sprocket Drive Links

Lower Works – Propel

Counterrotating Tracks, Crawler-mounted Disc Brakes and Tow Brake Release

1.1 mph

Gradeability

42%

Hydraulic Drive

Standard

Note

*Stability limitations apply.

Operating Propel Grade

25%*

Propel Speeds

0.3 mph

General

Cab (option)

FOPS to SAE J231

Operating Temperature Range

–40° C to +50° C (–40° F to +122° F)

Dimensions – Optimal Working Ranges

Center line of hole to center line of equalizer jack

5.0 in

Center line of hole to center line of rear jacks

15.75 in

Center line of hole to rear of operator’s cab

10.17 ft

Center line of machine to LH outside edge of 900 mm (35.43 in) tracks

10.4 ft

Center line of machine to LH side

11.84 ft

Center line of machine to RH outside edge of 900 mm (35.43 in) tracks

9.58 ft

Center line of machine to RH side

11.91 ft

Center line of machine to center line of LH rear leveling jack

7.51 ft

Center line of machine to center line of RH rear leveling jack

7.25 ft

Center line of rear jacks to center line of front jacks

36.15 ft

Diameter of jack pads

3.67 ft

Ground line to bottom of front jack panels

2.07 ft

Ground line to bottom of rear jack pads

2.23 ft

Ground line to high point with mast for 19.8 m (65 ft) single pass drill depth – mast at rest

32.64 ft

Ground line to top of deck

6.56 ft

Ground line to top of machinery house roof

15.32 ft

Height to top of cable reel (optional)

10.07 ft

Height to top of handrails on operator cab

18.73 ft

Height to top of machinery house pressurizing unit

16.57 ft

Overall height with mast for 19.8 m (65 ft) single pass

102.66 ft

Overall length of crawlers

22.5 ft

Overall length of machine

48.33 ft

Overall length of machine with mast for 19.8 m (65 ft) single pass drill depth – mast at rest

102.49 ft

Overall length of machine with optional cable reel

55.68 ft

Overall width of machine

23.75 ft

Weight*

Note

*Type and number of options will affect machine weight.

Working Weight

380000.0 lb

Mast Components – Mast

Angle Hole Drilling

25° off vertical in 5° increments*

Note

*With optional angle hole equipment.

Optional mast

70.0 ft

Raising and Lowering

(2) 228.6 mm (9 in) diameter hydraulic cylinders

Standard mast for drill pipe and one pipe rack

65.0 ft

Type

Computer analyzed, HD tubular lattice construction with back braces

Mast Components – Hoist/Pulldown

Auxiliary Winch – Standard Capacity

12000.0 lb

Bit Loading

Up to 63 975 kg (Up to 141,000 lb)

Electronic Depth Indicator

Standard

Feed Rate

Up to 7.62 m/min (Up to 25 ft/min)

Hoist Rate

Up to 22.86 m/min (Up to 75 ft/min)

Lowering Rate

Up to 22.86 m/min (Up to 75 ft/min)

Type

Chainless rack and pinion system driven by head-mounted excavator grade DC motor

Mast Components – Pipe Racks

Optional Rack Configurations and Maximum Drill Pipe Diameter – 2 Pipe Racks

Maximum diameter may vary

Single Rack 0.31 m (13.375 in) OD pipe at least 25 mm (1 in) wall thickness

Standard

Mast Components – Rotary Drive

Bit Maximum Speed

125.0 RPM

Cat® Shock Coupling

Standard

Rotary Drive – DC motor

145 kW (195 hp) @ 475V

Electrical – Equipment

Type

Static DC Variable Output

Electrical – Power Requirements

Note

**For alternate power configurations consult Caterpillar.

Voltage

3 Phase, 50/60 Hz, 4,160V to 7,200V**

Electrical – Main Electrical Systems

Air Compressor/AC Induction Motor – Dual Shaft – Standard

448 kW (600 hp) @ 4,160V available for 85 m3/min (3,000 ft3/min) compressor

Air Compressor/AC Induction Motor – Optional

597 kW (800 hp) available for 108 m3/min (3,800 ft3/min) compressors

Drive Transformer

3 Phase, 425 kVA dry-type

Hoist/Pulldown – DC Motor

97 kW (130 hp) @ 475V

Hydraulic Oil Cooler Fan

5.0 hp

Lighting

120/240V

Machinery House Pressurization – @ 529 m3/min (18,700 ft3/min) with 2.2 kW (3 hp) bleed fan

15 kW (20 hp) @ 460V

Main Hydraulic Oil Pumps

Driven from main air compressor motor

Operator Cab Pressurization with Heater and Air Conditioner

Standard

Transformer, Auxiliary

3 Phase, 250 kVA dry-type

Windshield Wipers – Upper and Lower Front

Standard