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Key Specs
The Cat® MD6640 Rotary Drill is the only electric-drive drill in the Cat family but it shares the same characteristics of performance, reliability and durability with the rest of the drills in the Cat lineup. Ideal for harsh environmental conditions, the MD6640’s industry-leading durability is driven by its excavator-style undercarriage. Thanks to rebuildable components, superior structure and easy serviceability, the MD6640 delivers long life. And it’s built for operators, with a number of features that enhance productivity and reduce fatigue. Designed to drill holes from 244-406 mm (9.6-16 in) in diameter, the MD6640 is is optimized for single-pass or multi-pass drilling in both rotary and down-the-hole drilling modes.
Durable excavator-style undercarriage, high-strength steel mainframe and mast members
Rebuildable components, long structural lifetime design and high degree of serviceability
Chainless rack and pinion system driven by head-mounted excavator-grade DC motor
| Bit Load | up to 64 000 kg (up to 141,096 lb) up to 64 000 kg (up to 141,096 lb) |
| Hole Diameter | 244 - 406 mm (9.6 - 16 in) 244 - 406 mm (9.6 - 16 in) |
| Engine | AC Induction Motor - Dual Shaft 522-746 kW (600 hp) AC Induction Motor - Dual Shaft 522-746 kW (600 hp) |
| Working Weight | 339512 lb 154000 kg |
| Multi-Pass Hole Depth | Up to 85.3 m (280 ft) Up to 85.3 m (280 ft) |
| Single Pass Hole Depth | 18.3 - 21.3 m (60 - 70 ft) 18.3 - 21.3 m (60 - 70 ft) |
| Location | (2) positioned outside mast at rear and (2) positioned outside frame at front (2) positioned outside mast at rear and (2) positioned outside frame at front |
| Pad Diameter - Non-Drill End | 9 in 229 mm |
| Stroke - Drill End | 66 in 1676 mm |
| Stroke - Non-Drill End | 66 in 1676 mm |
| Number | 4 4 |
| Pad Diameter - Drill End | 9 in 229 mm |
| Gradeability | 42% 42% |
| Type | Cat 390 Excavator Style Cat 390 Excavator Style |
| Triple Grousers (2) | 900 mm (35.43 in); for soft ground; 120 kPa (17.4 psi) ground bearing pressure 900 mm (35.43 in); for soft ground; 120 kPa (17.4 psi) ground bearing pressure |
| Triple Grousers (1) | 750 mm (29.53 in); for hard ground; 140 kPa (20.3 psi) ground bearing pressure 750 mm (29.53 in); for hard ground; 140 kPa (20.3 psi) ground bearing pressure |
| Minimum Ambient Rating - Standard | -40 °F -40 °C |
| Maximum Ambient Rating - Standard | 122 °F 50 °C |
| Angle Drilling | 25° off vertical in 5° increments (with optional angle hole equipment) 25° off vertical in 5° increments (with optional angle hole equipment) |
| Winch System - Rating | 12000 lb 5443 kg |
| Working Weight | 380000 lb 172365 kg |
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MD6640 Rotary Drills
MD6640 Rotary Drills
MD6640 Rotary Drills
MD6640 Rotary Drills
MD6640 Rotary Drills
MD6640 Rotary Drills
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