Cat® MD6640 Rotary Blasthole Drill Specifications Mainframe Components Lower Works Air Compressor with Unloader Package Oil-Flooded Screw Compressor and Constant Volume Oil Pump for Optimized Cooling Standard 85 m3/min (3000 cfm) free air, 4.5 bar (65 psi) Optional 108 m3/min (3800 cfm) free air, 4.5 bar (65 psi) 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) Leveling Jacks (4) Automatic leveling system Jack Size - Rear Jack Size - Front Standard 229 mm (9 in) diameter x 1 676 mm (66 in) stroke 229 mm (9 in) diameter x 1 676 mm (66 in) stroke (2) positioned outside mast at rear and (2) positioned outside frame at front Lubrication Automatic PLC Centralized Standard Drilling Hole Diameter Hole Depth (9.625 – 16 in) 244 – 406 mm 19.81 m (65 ft) Tread Widths - Standard Ground Bearing Pressure Optional Wide Links Ground Bearing Pressure Total effective bearing area (3 556 mm treads) Propel Chainless Hydraulic Drive, Counter-rotating Tracks, Crawler-mounted Disc Brakes and Tow Brake Release Propel Speed Operating Propel Guide Gradeability 914 mm (36 in) 113 kPa (16.4 psi) 1 067 mm (42 in) 96.5 kPa (14 psi) 64 m2 (689 ft2) 221 kPa (32.1 Psi) Standard 1.45 km/h (0.9 mph) 2 25% 80%

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) F1 Centerline of machine to LH side 3.61 m (11 ft 10 in) 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)...

Rotary Blasthole Drill—MD6640 Bailing Velocities: 15.5º C (60º F) @ Sea Level Diameter Nominal Compressor Rating - m3/min (icfm) Hole cm Pipe in cm 25.1 9.875 27.0 10.625 31.1 84.9 (3,000) in m/min 17.8 7 19.4 7.625 12.25 21.9 31.1 12.25 34.9 38.1 107.6 (3,800) fpm m/min fpm 3 450 11,300 4 378 14,359 3 050 10,000 3 879 12,724 8.625 2 200 7,300 2 807 9,206 23.5 9.25 2 600 8,500 3 293 10,800 13.75 27.3 10.75 2 300 7,500 2 890 9,478 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...

Rotary Blasthole Drill—MD6640 Dust Collector Leveling Jack, Left Rear Hi-Voltage Disconnect Main Auxiliary Transformer Transformer Lightning Arresters Compressor Oil Cooler and Radiator Jack Pad Service Ladder Hydraulic Oil Cooler L.H. Pipe Rack Hi Voltage Compressor Start Cabinet Deck Bushing C Machine L and Deck Bushing Main Air Pipe Pipe Thread Lubricators Electro/Hydraulic Valves Leveling Jack, Left Front Low Voltage Cabinet Programmable Controller Cabinet Rotary Drive Control Cabinet Main Drive Motor Hydraulic Pumps and Gearcase Mast Loadcenter Bit Lubricator A-Frame Operator’s Cab Jack...