• Banner
Rotary Drills

Cat® rotary drills are available in six models, with a maximum bit load range of up to 75 000 kg (165,347 lb), to suit a wide variety of applications. They're proven to deliver efficiency, high productivity and low cost, as well as provide a comfortable environment for the operator. Cat® track drills are designed for optimum performance and serviceability, while maintaining the ruggedness and reliability our customers have come to expect. Fast cycle times and a low operating cost are achieved through our proven designs that offer enhanced maneuverability, better pattern coverage, and faster set-ups.

MD6420 Rotary Drill

  • Specification Summary

  • Bit Load up to 42 000 kg (up to 92,594 lb)
  • Hole Diameter 229 - 311 mm (9.0 - 12.25 in)
  • Engine C27 (Tier 2) - 597 kW (800 hp) at 2,100 rpm
  • Horsepower capacity 216.0 kW
  • Product Brochure

    Download

Product Details

Specifications

Bit Load up to 42 000 kg (up to 92,594 lb)
Hole Diameter 229 - 311 mm (9.0 - 12.25 in)
Engine C27 (Tier 2) - 597 kW (800 hp) at 2,100 rpm

Rotary Drive System

Horsepower capacity 216.0 kW
Torque 0-15 185 N?m (0-11, 200 lbf-ft)

Engine (Standard) – C27 Tier 2

Rated horsepower 597.0 kW
Full load 2100 RPM
Fuel tank 1514 L
Manufacturer Caterpillar
Optional fuel tank 1703 L

Engine (Optional) – QST-30

Fuel tank 1514 L
Full load 2100 RPM
Manufacturer Cummins
Optional fuel tank 1703 L
Rated horsepower – Non-cert 634 and 783 kW (850 and 1,050 hp)
Rated horsepower – Tier 2 783 kW

Undercarriage

Brake release Automatic
Brakes Spring set, hydraulic release
Front Three-point oscillating type
Gradeability mast down 17%
Maximum drive horsepower per track 216 kW
Number of rollers on each side 13
Rock guards/chain guards Standard full-length guards
Track adjustment means Hydraulic with grease gun
Track drive disconnect Standard (manual)
Tram speed maximum 2.27 km/h

Compressor (Optional): Oil-flooded, single-stage screw

Discharge air flow (sea level) 42.5
Discharge air flow (sea level) 67.9
Maximum operating pressure 10.3/24.1/34.4 bar (150/350/500 psi)
Maximum operating pressure 6.9 bar

Accessories, Tools and Handling Equipment

Bit Sub – Bottom thread Depends on bit diameter
Bit Sub – Diameter Depends on pipe diameter
Bit Sub – Length Up to 2286 m (Up to 90 in)
Bit Sub – Table bushing Roller-type or two-piece with replaceable liner
Bit Sub – Top thread Depends on pipe diameter
Bit Sub – Wall thickness 25 mm
Drill Pipe (optional) – Diameter 178 mm, 194 mm, 219 mm (7.0 in, 7.625 in, 8.625 in)
Drill Pipe (optional) – Length – (standard for 16 m/50 ft configuration) – two pipes coupled together plus bit sub 7.62 m
Drill Pipe (optional) – Threads Depends on pipe outside diameter
Drill Pipe (optional) – Wall thickness 25.4 mm
HOBO Break-out Wrench – Location 178 mm, 194 mm, 219 mm (7.0 in, 7.625 in, 8.625 in)
HOBO Break-out Wrench – Power 25
HOBO Break-out Wrench – Support 12.19
HOBO Break-out Wrench – Wrench type Varies with outside pipe diameter
Pipe Rack (Inside the Mast) Carousel with stationary pods and breaker plates
Pipe Rack (Inside the Mast) – 13 m/40 ft configuration (optional deep hole package) – 5 pipes: 12.19 m (40 ft) pipe – outside diameter 178 mm, 194 mm, 219 mm (7.0 in, 7.625 in, 8.625 in)
Pipe Rack (Inside the Mast) – 13 m/40 ft configuration (standard) – 4 pipes: 12.19 m (40 ft) pipe 178 mm, 194 mm, 219 mm (7.0 in, 7.625 in, 8.625 in)
Pipe Rack (Inside the Mast) – 16 m/50 ft configuration (standard) – 4 pipes: 7.62 m (25 ft) pipe 178 mm, 194 mm, 219 mm (7.0 in, 7.625 in, 8.625 in)
Pipe Rack (Inside the Mast) – Pipe rack index Hydraulic cylinder with locking pin
Pipe Rack (Inside the Mast) – Pipe rack swing Hydraulic cylinders (2)
Top Adapter Sub – Bottom thread Depends on pipe diameter
Top Adapter Sub – Diameter Depends on pipe diameter
Top Adapter Sub – Length 914 mm
Top Adapter Sub – Top thread (API Reg.) 140 mm
Top Adapter Sub – Wall thickness 25 mm
Winch System – Cable size 13 mm
Winch System – Rating 1587 kg

Operator’s Cab

Climate control Wall-mounted, AC/heating/ pressurizing unit
Floor area 3 m2
Height inside 1943 mm
Helper’s seat Fixed folding jump seat
Number of doors Two with windows (included in above)
Number of windows 10
Operator’s seat One swivel-type with armrests, headrest and retractable seat belt
Other Window wipers and washers
Type Shock-mounted; two-man, integrated FOPS certified
Windows (tinted safety glass in rubber mounting) 6 mm

Operating Temperature

Altitude Up to 4572 m (Up to 15,000 ft)
Maximum ambient rating (standard) 52.0 ° C
Minimum ambient rating (standard) -28.0 ° C

Compressor (Standard): Oil-flooded, single-stage screw

Discharge air flow (sea level) 56.6
Maximum operating pressure 6.9 bar

Dust Curtain (Optional Hydraulic Lifters, Front and Rear)

Dust deflector Optional hydraulic lifters, front and rear

Leveling Jacks

Location Two front, two rear
Number 4
Pad diameter – Drill end 914 mm
Pad diameter – Non-drill end 762 mm

Mainframe, Decks and Walkways

Jacks, mast pivot and deck Welded integrally to mainframe
Machine deck Access both sides
Tools and battery box Lockable door, below front deck
Tow hooks Welded, two (2) front

Pull-down/Hoisting Capacity

Cable type – 29 mm (1.125 in) DYFORM 8
Drilling feed rate 0-19 m/min (0-61 ft/min)
Head travel (13 m/40 ft configuration) 15.24 m
Head travel (16 m/50 ft configuration) 18.29 m
Hoist capacity Up to 19 843 kg (Up to 43,745 lbf)
Pull-down capacity Up to 383 kN (Up to 86,000 lbf)
Retract rate 0-33.5 m/min (0-110 ft/min)

Drill Table and Work Deck

Table height off ground 1448 mm
Viewing hatch In the rear deck; hydraulically operated from the cab
Wide walkways Around the drill deck

13- or 16-Meter Mast Configuration

Depth multi-pass (13 m/40 ft configuration) Up to 75.3 m (Up to 247 ft)
Depth multi-pass (16 m/50 ft configuration) Up to 46.9 m (Up to 154 ft)
Depth single pass (13 m/40 ft configuration) 13.4 m
Depth single pass (16 m/50 ft configuration) 16.46 m
Hole diameter Up to 311 mm (Up to 12.25 in)

Engine (Optional) – C27 Tier 2

Fuel tank 1514 L
Full load 2100 RPM
Manufacturer Caterpillar
Optional fuel tank 1703 L
Rated horsepower 652 kW
  • ENGINE
    •  Metal turbo and exhaust manifold covers
    •  Engine pre-lube
    •  Additional filtration
    •  Coolant conditioner
  • MAST
    •  Up to 311 mm (121⁄4 in) hole diameter
    •  Up to 39 009 kg (86,000 lb) rated capacity single cylinder pulldown/hoist system
    •  Up to 41 347 kg (91,152 lb) bit load with one pipe in the drill string
    •  Patented HOBO (Hydraulically Operated Break Out) wrench operated from the cab
    •  Auto cable tensioning system
    •  30 degree angle drilling package and mast locks and lock/unlock indicator in cab
    •  Winch system 1587 kg (3,500 lb) capacity
  • TOP DRIVE
    •  Two (2) motors
    •  Rotation speed 0-137 rpm
    •  Torque up to 15 185 N·m (11,200 lbf-ft)
  • Two (2) motors
    • Rotation speed 0-137 rpm
      • Torque up to 15 185 N·m (11,200 lbf-ft)
        • OPERATOR’S CAB
          •  Integrated FOPS
          •  Totally enclosed, insulated, two-man cab
          •  Two (2) hinged doors with heavy duty freezer type door latch system
          •  Ten (10) windows (safety glass, tinted)
          •  Windshield wiper and washer kit
          •  Ergonomic operator’s console with full instrumentation
          •  Ergonomic operator’s seat with head and arm rests, retractable seat belt, air suspension mount
          •  Electric over hydraulic drill functions
          •  Auxiliary functions operated by fingertip toggle switches
          •  More than 3 m2 (32.4 ft2) of floor space
          •  Excellent visibility
          •  dB(A) rating of 80 or less
          •  Wall mounted air conditioner/heater/pressurizer, belt driven
          •  Rubber shock-mounts to absorb vibration
          •  Electric horn operated by push button in the cab
        • UNDERCARRIAGE
          •  Crawler mounted, excavator type
          •  750 mm (29.5 in) triple grousers
          •  Full length chain guides/rock guards
        • MAINFRAME, DECKS AND WALKWAYS
          •  Rear deck is stationary during both angle and vertical drilling modes
          •  Viewing hatch in rear deck, hydraulically operated from cab to help with spotting holes
          •  Walkways around cab
          •  Wide access ladder at the cab with platform in front and at the back of the cab
          •  Four (4) hydraulic leveling jacks (122 cm/48 in)
          •  Centralized lubrication system
          •  Total 3217 L (850 gal) fuel tanks with isolation valves
          •  Additional mast rests mounted on non-drill end
          •  4 × 8D maintenance free batteries
        • Rear deck is stationary during both angle and vertical drilling modes
          • Viewing hatch in rear deck, hydraulically operated from cab to help with spotting holes
            • Walkways around cab
              • Wide access ladder at the cab with platform in front and at the back of the cab
                • Four (4) hydraulic leveling jacks (122 cm/48 in)
                  • Centralized lubrication system
                    • Total 3217 L (850 gal) fuel tanks with isolation valves
                      • Additional mast rests mounted on non-drill end
                        • 4 × 8D maintenance free batteries
                          • CAROUSEL
                            •  Hydraulically operated from the cab
                            •  No moveable parts
                            •  Automatic indexing
                          • COOLING (SINGLE, FRONT-END MOUNTED)
                            •  Maximum ambient cooling capacity of 52° C (125° F)
                          • Maximum ambient cooling capacity of 52° C (125° F)
                            • HYDRAULIC SYSTEM
                              •  Two (2) variable displacement axial piston pumps, in closed loop system, that operate the drill rotation and tram functions
                              •  One (1) variable displacement axial piston pump, in open loop system on demand, that operates pulldown/hoist and all auxiliary functions
                              •  Double pump drive
                              •  Fan circuit pump
                              •  Dual filtration
                            • DRILL ACCESSORIES (TRICONE/ROTARY)
                              •  Top sub adaptor
                              •  Roller deck bushing
                              •  Bit sub (229 cm/ 90 in S-S)
                              •  Horseshoe bushing
                              •  Bit basket
                              •  Lifting bail
                              •  Auto tool wrench (deck wrench)
                            • DUST SYSTEM
                              •  See Optional Equipment and select the required system
                            • PAINT
                              •  Standard Caterpillar colors
                            • Standard Caterpillar colors
                              • MISCELLANEOUS
                                •  Backup alarm
                                •  Filter kit for 50-hour preventive maintenance.
                                •  Seven (7) 60-watt LED lights for night drilling
                                •  Side walkways and handrails with side boarding ladder
                                •  Outside cab platform for easy access
                                •  Tool box, mounted under walkway (tools not included)
                                •  Lift lugs
                                •  Towing hooks (front end)
                                •  Battery disconnect
                              • DEEP HOLE PACKAGE
                                •  Five (5) pipe capacity carousel, 12.19 m (40 ft) long drill pipe coupled to 244 cm (96 in) long bit sub for up to 75.3 m (247 ft) hole depth: – 194 mm (75⁄8 in) diameter, 12.19 m (40 ft) length S-S pipes, drill pipe not included – Single
                                •  Five (5) pipe capacity carousel, 12.19 m (40 ft) long drill pipe coupled to 244 cm (96 in) long bit sub for up to 75.3 m (247 ft) hole depth: – 219 mm (85⁄8 in) diameter, 12.19 m (40 ft) length S-S pipes, drill pipe not included – Single
                              • Five (5) pipe capacity carousel, 12.19 m (40 ft) long drill pipe coupled to 244 cm (96 in) long bit sub for up to 75.3 m (247 ft) hole depth: – 194 mm (75⁄8 in) diameter, 12.19 m (40 ft) length S-S pipes, drill pipe not included – Single
                                • Five (5) pipe capacity carousel, 12.19 m (40 ft) long drill pipe coupled to 244 cm (96 in) long bit sub for up to 75.3 m (247 ft) hole depth: – 219 mm (85⁄8 in) diameter, 12.19 m (40 ft) length S-S pipes, drill pipe not included – Single
                                  • DRILLING ACCESSORIES KIT FOR HAMMER DRILLING (in lieu of rotary drill accessories)
                                    •  Heavy duty shock sub and adaptor, bit sub, two-piece table bushing, horseshoe bushing, lifting ball, bit basket, 113.5 L (30 gal) hammer oil injection system
                                  • Heavy duty shock sub and adaptor, bit sub, two-piece table bushing, horseshoe bushing, lifting ball, bit basket, 113.5 L (30 gal) hammer oil injection system
                                    • DUST COLLECTION OPTIONS
                                      •  Dust Collector 4500 Series
                                      •  Water injection system for dust suppression with 1374 L (363 gal) tank mounted below front deck
                                      •  Water injection system with 2271 L (600 gal) tank mounted on the top-deck (mounted in place of Dry Dust Collector)
                                      •  Note: Dry Dust Collector and Water Injection on the same drill can be selected only with below deck tanks.
                                    • Dust Collector 4500 Series
                                      • Water injection system for dust suppression with 1374 L (363 gal) tank mounted below front deck
                                        • Water injection system with 2271 L (600 gal) tank mounted on the top-deck (mounted in place of Dry Dust Collector)
                                          • Note: Dry Dust Collector and Water Injection on the same drill can be selected only with below deck tanks.
                                            • DRILLING
                                              •  Drill pipe (see Drill Pipe Price List)
                                              •  Two-piece split bushing
                                              •  Rotary head RPM gauge, digital
                                              •  Rotary torque control
                                              •  Rotation speed 0-173 rpm
                                              •  Rotary/hammer shock sub
                                              •  Rock oiler injection system (for Tricone); 113.56 L (30 gal)
                                              •  Pipe guide roller assembly mounted on drill deck (rear deck)
                                              •  Dual purpose carousel (hammer – Tricone pipe rack/4-pod only)
                                            • FLUIDS
                                              •  Fast fill fuel only
                                              •  Fast fill full service center (fuel, hydraulic oil, coolant, engine oil)
                                              •  Automatic lubrication system
                                              •  Drilling pipe thread lube system, activated from inside the cab
                                            • SYSTEM PROTECTION
                                              •  Additional loop filters between pumps and motors
                                              •  Hydraulic diagnostic test station
                                              •  Engine mounted stop
                                              •  Ground level engine shutdown
                                              •  Rotating beacons (one on mast crown, one on cab, one on front-end)
                                            • COLD WEATHER AIDS
                                              •  Diesel fired heating system (self-contained heater for engine coolant, water, hydraulic oil, fuel) – runs during engine operation
                                              •  Cab floor heater (electric fan with heater core utilizing engine coolant)
                                            • INDICATOR SYSTEMS
                                              •  Jack retract indicators
                                              •  Tram interlock, jacks (includes indicator)
                                              •  Tram interlock, head-position
                                              •  Pipe rack interlock
                                              •  Filter indicators, centrally mounted in cab (hydraulic, compressor, air intake)
                                            • Jack retract indicators
                                              • Tram interlock, jacks (includes indicator)
                                                • Tram interlock, head-position
                                                  • Pipe rack interlock
                                                    • Filter indicators, centrally mounted in cab (hydraulic, compressor, air intake)
                                                      • MISCELLANEOUS
                                                        •  Additional fuel tank 1374 liter (363 gal), under front end
                                                        •  24 to 12 volt converter
                                                        •  Extra lighting package (five additional 60 watt LED lights)
                                                        •  Blowdown hose with nozzle
                                                        •  Hydraulic rear dust curtain lifting system
                                                        •  Hydraulic front dust curtain lifting system
                                                        •  Closed circuit camera system with two cameras for front and rear mounting and a monitor in cab
                                                        •  Radio AM/FM, CD player and USB port for iPod
                                                        •  Radio CB with antenna
                                                        •  XIR cab glass upgrade
                                                        •  Thermal double-pane glass upgrade
                                                        •  Cab window shades
                                                        •  Remote jump start terminals
                                                        •  Main drill window cage
                                                        •  Lanyard attachment – cable with traveling hook on mast, and personnel harness
                                                        •  Tram remote control (pendant/cable) for operation of tram controls from ground
                                                        •  Winch remote control (pendant/cable) for operation of winch while on rear deck
                                                        •  24V to 110V or 220V AC invertor
                                                        •  152 cm (60 in) leveling jacks (front end only)
                                                        •  Jib crane with pedestal control mounted on rear deck
                                                        •  Mechanical tool kit (reference TV014590)
                                                        •  Three-point harness kit for operator’s seat
                                                        •  Water injection flow meter
                                                        •  Cab manometer
                                                        •  Extreme hot weather lubricant upgrade (compressor oil)
                                                        •  Extreme hot weather lubricant upgrade (hydraulic oil)
                                                        •  Basic engine shut down timer
                                                        •  Cat EMS panel with Engine Data Link Connector
                                                        •  Mirror kit (includes three bolt-on mirrors)
                                                        •  Slope indicator mounted in cab to indicate forward and lateral angle
                                                        •  Hydraulic oil temperature gauge mounted in dash
                                                        •  Document holder mounted inside the cab

                                                      360° Exterior View

                                                      360° Interior View

                                                      Built for it