MD6640 Rotary Drill
Designed for longevity and easy access to components, the MD6640 is favored by drillers for dependability and serviceability. Adding to its productivity are smart features such as a simple hydraulics system, reliable electrical in all weather conditions, quick pipe changes, and angle hole drilling to 25° in 5° increments. Efficient and comfortable cab is designed for maximum operator productivity. Additionally, vibration and noise are minimized by the use of proven programmed drill control option with the cushioned centralizer and shock sub.
- Technical Specs
- 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
- 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)
- 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)
- 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
- Automatic PLC Centralized
- Standard
- 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
- 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
- Cab (option)
- FOPS to SAE J231
- Operating Temperature Range
- –40° C to +50° C (–40° F to +122° F)
- 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
- Note
- *Type and number of options will affect machine weight.
- Working Weight
- 380000.0 lb
- 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
- 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
- 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
- Bit Maximum Speed
- 125.0 RPM
- Cat® Shock Coupling
- Standard
- Rotary Drive – DC motor
- 145 kW (195 hp) @ 475V
- Type
- Static DC Variable Output
- Note
- **For alternate power configurations consult Caterpillar.
- Voltage
- 3 Phase, 50/60 Hz, 4,160V to 7,200V**
- 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