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Rotary Drills

Building on the solid legacy of proven designs, today's Cat® Rotary Blasthole Drills offers substantial technology, efficiency and productivity improvements to efficiently reach your targeted productivity rates. Our newest models fully integrate Cat designs, components and technologies, and every model delivers exactly what you expect from a product bearing the Cat brand: durability, precision, productivity, and unmatched parts and service support, anywhere in the world. It’s what lies beneath the paint that counts — that’s where you’ll find everything we stand for.

MD6420C Rotary Blasthole Drill Autonomous Ready

  • Specification Summary

  • Hole Diameter Up to 311 mm (Up to 12.25 in)
  • Engine C32 ACERT
  • Torque, dual motors 0-17 313 N∙m (0-12,769 lbf-ft)
  • Rotation speed 0-137 rpm
  • Product Brochure

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Product Details

Specifications

Hole Diameter Up to 311 mm (Up to 12.25 in)
Engine C32 ACERT
Bit Load Up to 41 346 kg (Up to 91,152 lb)

Rotary Drive System

Torque, dual motors 0-17 313 N∙m (0-12,769 lbf-ft)
Rotation speed 0-137 rpm

Drill Table and Work Deck

Table height off ground 1448 mm
Components Hydraulically operated viewing hatch with LED hatch viewing spot light

Leveling Jacks

Lift capacity – each 511 kN
Number 4
Pad diameter – Non-drill end 762 mm
Pad diameter – Drill end 914 mm
Stroke on non-drill end 152 cm
Stroke on drill end 122 cm

Operating Environment

Altitude Up to 4572 m (Up to 15,000 ft)
Maximum ambient rating (standard) 52 ° C
Minimum ambient rating (standard) -1 ° C
Note Optional cold weather packages available

Operator’s Cab

Climate control Roof-mounted, AC/heating/pressurizing unit
Floor area 4.85 m2
Height inside 2146 mm
Location To the right from the mast if facing rear deck from the rear end
Number of doors Two (2) with windows (included in above)
Number of windows 12
Other Window wipers and washers
Type Shock-mounted; two-man, integrated FOPS certified
Windows (tinted safety glass laminated in rubber mounting) 14 mm

Undercarriage

Brake release Automatic
Brakes Spring set, hydraulic release
Front Three-point oscillating type
Maximum drive horsepower per track 216 kW
Number of rollers on each side Total of 16: (13) lower rollers, (3) upper/carrier rollers
Track adjustment means Hydraulic with grease gun
Track drive disconnect Standard (manual)
Tram speed maximum 2.27 km/h
Rock guards/chain guards Standard full-length guards
Gradeability mast down – CDH (cab down hill) 25%
Gradeability mast down – CUH (cab up hill) 13%

Compressor (Standard): Poppit inlet, fixed displacement

Discharge air flow (sea level) 56.6 m3/min
Maximum operating pressure 6.9 bar

Pull-down/Hoisting Capacity

Retract rate 0-33.5 m/min (0-110 ft/min)
Pull-down capacity Up to 383 kN (Up to 86,000 lbf)
Hoist capacity Up to 311 kN (Up to 70,000 lbf)
Drilling feed rate 0-33.5 m/min (0-110 ft/min)
Head travel (16 m/50 ft mast) 18.29 m
Head travel (13 m/40 ft mast) 15.24 m
Head travel (10 m/35 ft mast) 12.19 m
Cable type – 29 mm (1.125 in) DYFORM 8
Bit load force Up to 41 346 kg (Up to 91,152 lb)

Accessories, Tools and Handling Equipment

Shock Sub (DTH Application) Thread – API reg. 140 mm (5.5 in)
Top Adapter Sub Bottom thread – depends on pipe diameter
Bit Sub (Rotary Application) Table bushing roller-type or two-piece with replaceable liner
Pipe Rack (Inside the Mast) Carousel with stationary pods and breaker plates
16 m Configuration Outside diameter – 194 mm (75⁄8 in) or 219 mm (85⁄8 in)
13 m Configuration Outside diameter – 194 mm (75⁄8 in) or 219 mm (85⁄8 in)
10 m Configuration Length of drill – 10.67 m (35 ft)
Winch System Cable size – 13 mm (0.5 in)
Pipe Handling Lifting bail-drill pipe/bit sub

Compressor (Optional): Type 1 – Butterfly inlet, adjustable from half to full displacement

Discharge air flow (sea level) 73.56 m3/min
Maximum operating pressure 6.9 bar

10-, 13- or 16-Meter Mast Configuration

Hole diameter Up to 311 mm (Up to 12.25 in)
16 m/50 ft mast – Depth single pass 16.46 m
16 m/50 ft mast – Multi-pass Up to 46.9 m (Up to 154 ft)
13 m/40 ft mast – Depth single pass 13.4 m
13 m/40 ft mast – Multi-pass Up to 74.4 m (Up to 244 ft)
10 m/35 ft mast – Depth single pass 10.29 m
10 m/35 ft mast – Multi-pass Up to 63.4 m (Up to 208 ft)
Angle drilling 30° (in 5° increments)

Compressor (Optional): Type 2 – Poppit inlet, fixed displacement

Discharge air flow (sea level) 42.5 m3/min
Maximum operating pressure 10.3/24.1/34.4 bar (150/350/500 psi)
Hi/low pressure switch, bit oil injection system 114 L

Mainframe, Decks and Walkways

Jacks, mast pivot and deck Welded integrally to mainframe
Machine deck Access both sides

Engine – C32 ACERT* (Standard)

Model C32 ACERT
Rated horsepower 680 kW
Fuel tank 1514 L plus, 1703 L (400 gal plus, 450 gal)
Emissions * The C32 ACERT engine meets U.S. EPA Tier 2/EU Stage II equivalent emission standards

Engine – C32 ACERT* (Optional)

Model C32 ACERT
Rated horsepower 775 kW
Fuel tank 1514 L plus, 1703 L (400 gal plus, 450 gal)
Emissions * The C32 ACERT engine meets Tier 2/Stage II equivalent emission standards

Controls

Manuals Operations/maintenance manuals and all schematics are stored in drill monitor
Display English control system display text ex-factory. May be changed to other languages by dealer.
Components Wiring for terrain interface provided
Electronic control: – Monitoring – Diagnostic system

Base Machine

Components Fixed dust curtains – four sides

Mandatory Attachments – POWER TRAIN

Engine and Compressor

  • Low horsepower package: – Engine: Tier 2 equivalent, 680 kW (912 hp), 1,800 rpm – Compressor: 56.6 m3/min (2,000 ft3/min) @ 6.9 bar (100 psi), 1,800 rpm, poppit inlet – Fixed displacement
  • High horsepower package: – Engine: Tier 2 equivalent, 775 kW (1,039 hp), 1,800 rpm – Compressor: 42.5 m3/min (1,500 ft3/min) @ 10.3/24.1/34.5 bar (150/350/500 psi), 1,800 rpm, poppit inlet – Hi/low pressure switch, bit oil injection system, 114 L (30 gal) for DTH – Fixed displacement
  • High horsepower package: – Engine, Tier 2 equivalent, 775 kW (1,039 hp), 1,800 rpm – Compressor: 73.6 m3/min (2,600 ft3/min) @ 6.9 bar (100 psi), 1,800 rpm, butterfly inlet – Adjustable from half to full displacement

Mandatory Attachments – MAST

Mast, Pipe Carousel, 10 m

  • 10 meter mast, five (5) pipe carousel
  • Mast: – Up to 10.29 m (33 ft 9 in) single pass hole depth – Drill on tracks, changing bit above deck – Single pass hole using one (1) each 10.67 m (35 ft) length drill pipe – With bit sub 76 cm (30 in)
  • Carousel: – Five (5) pipe capacity allowing 63.39 m (208 ft) total hole depth – Pipe diameter 194 mm (75⁄8 in) or 219 mm (85⁄8 in) – 10.67 m (35 ft) length drill pipe (drill pipe not included) – Bit load with one pipe up to 41 346 kg (91,152 lb) – Winch 3629 kg (8,000 lb) with 1588 kg (3,500 lb) lift capacity

Mast, Pipe Carousel, 13 m

  • 13 meter mast, five (5) pipe carousel with additional mast rest
  • Mast: – Up to 13.4 m (44 ft) single pass hole depth – Drill on tracks, changing bit above deck – Single pass hole using one (1) each 12.19 m (40 ft) length drill pipe with bit sub 229 cm (90 in)
  • Carousel: – Five (5) pipe capacity allowing 74.37 m (244 ft) total hole depth – Pipe diameter 194 mm (75⁄8 in) or 219 mm (85⁄8 in) – 12.19 m (40 ft) length drill pipe (drill pipe not included) – Bit load with one pipe up to 41 563 kg (91,630 lb) – Winch 3629 kg (8,000 lb) with 1588 kg (3,500 lb) lift capacity

Mast, Pipe Carousel, 16 m

  • 16 meter mast, four (4) pipe carousel with additional mast rest
  • Upper roller pipe catcher arm with drill function interlock when pipe catcher is not closed
  • Mast: – Up to 16.46 m (54 ft) single pass hole depth – Drill on tracks, changing bit above deck – Single pass hole using two (2) each 7.62 m (25 ft) length drill pipe – With bit sub 228.6 cm (90 in)
  • Carousel: – Four (4) pipe capacity allowing 46.93 m (154 ft) total hole depth – Pipe diameter 194 mm (75⁄8 in) or 219 mm (85⁄8 in) – 7.62 m (25 ft) length drill pipe (drill pipe not included) – Bit load with two pipes up to 42 000 kg (92,594 lb) – Winch 3629 kg (8,000 lb) with 1588 kg (3,500 lb) lift capacity

Rotary Application

  • Mast, 10 m – diameter, 194 mm (75⁄8 in) or 219 mm (85⁄8 in): – Tooling 194 mm (75⁄8 in) or 219 mm (85⁄8 in) diameter – Roller bushing – Bit sub 76.2 cm (30 in) long – Five (5) pipe retainer
  • Mast, 13 m – diameter, 194 mm (75⁄8 in) or 219 mm (85⁄8 in): – Tooling 194 mm (75⁄8 in) or 219 mm (85⁄8 in) diameter – Roller bushing – Bit sub 228.6 cm (90 in) – Five (5) pipe retainer
  • Mast, 16 m – diameter, 194 mm (75⁄8 in) or 219 mm (85⁄8 in): – Tooling 194 mm (75⁄8 in) or 219 mm (85⁄8 in) diameter – Roller bushing – Bit sub 228.6 cm (90 in) – Four (4) pipe retainer

DTH Application

  • Mast, 10 m – diameter, 194 mm (75⁄8 in) or 219 mm (85⁄8 in): – Tooling 194 mm (75⁄8 in) or 219 mm (85⁄8 in) diameter – Split bushing – Customer supplied bit sub – Five (5) pipe retainer
  • Mast, 13 m – diameter, 194 mm (75⁄8 in) or 219 mm (85⁄8 in): – Tooling 194 mm (75⁄8 in) or 219 mm (85⁄8 in) diameter – Split bushing – Customer supplied bit sub – Five (5) pipe retainer
  • Mast, 16 m – diameter, 194 mm (75⁄8 in) or 219 mm (85⁄8 in): – Tooling 194 mm (75⁄8 in) or 219 mm (85⁄8 in) diameter – Split bushing – Customer supplied bit sub – Four (4) pipe retainer

Top Sub/Shock Sub

  • Top sub, rotary application: – Standard for rotary application, DTH cannot use top sub
  • Shock sub, dual application: – DTH has to use shock sub, optional for rotary application – Shock sub with crossover sub, rotary or DTH

Deck Wrench

  • Sliding deck wrench with standard bit basket
  • Sliding deck wrench with hydraulically operated bit basket

Drill Pipe Catcher

  • Pipe catcher, fixed cable
  • Pipe catcher, hydraulic drill function interlock

Mandatory Attachments – UNDERCARRIAGE

  • Undercarriage, 750 mm (29.53 in): – Undercarriage with full length rock guards and tram distance meter – 750 mm (29.53 in) triple grousers – Used for soft ground application
  • Undercarriage, 600 mm (23.62 in): – Undercarriage with full length rock guards and tram distance meter – 600 mm (23.62 in) triple grousers – Used for hard ground application

Mandatory Attachments – OPERATOR ENVIRONMENT

Control Group

  • Standard (includes all parts listed under standard equipment)
  • Deluxe (includes standard machine control group features) plus: – Auto leveling and retract – Automation/operator assist auto angle
  • Ultra (includes deluxe control group features) plus: – Auto drilling, excluding pipe change – One-touch drilling is only applicable when using single pass drilling

Mandatory Attachments – SERVICE STATION

  • Fast fill, full service, rotary: – Full service center, fill and evacuation fuel, compressor, coolant, engine oil, hydraulic and gear box – 500 hours engine oil reserve system

Mandatory Attachments – COOLING

  • Climate, standard climate range: – Ambient temperature range: –1° C (30° F) to 48° C (118° F) – Cab cooling to 19° C (66° F) – Safety laminated tinted glass
  • Hot climate: – Ambient temperature range: –1° C (30° F) to 52° C (125° F) – Cab cooling to 19° C (66° F) – Safety laminated tinted glass – Window shades – High temp hydraulic oil – High temp compressor oil

Mandatory Attachments – DUST SUPPRESSION

  • Water injection, 2324 L (614 gal): – One (1) tank with 1378 L (364 gal) – Two (2) tanks with 473 L (125 gal) each – Fast fill water system – Stainless steel plumbing – ECM control of water injection pump interlock – Water flow meter/current control and tank level

Mandatory Attachments – STAIRS

  • Frame, Standard: – Includes basic mainframe and deck features plus: - Fixed stairs to main deck cab area, on cab side of frame
  • Frame, Ultra: – Includes basic mainframe and deck features plus: - Cascading, self-leveling stairs to main deck cab area - Stairs on cab side of the frame - Switched walkway lighting at ground and deck levels - Tram interlock if stairs are down

Optional Attachments

Optional attachments may vary. Consult your Cat dealer for details.

MAST ACCESS LADDER

  • Ladder to access mast, grating for maintenance inside mast
  • Posts only for lanyard attachment to use with cable for traveling hook and harness

OPERATOR ENVIRONMENT

  • Window Shades: – Included in hot climate package – Optional for other climate packages

ATTACHMENTS

  • Dust suppression
  • Hydraulic dust curtains: – Fixed curtains on left and right sides – Auto raise hydraulic lifted curtains for rear and front – Includes ECM control tram interlock if dust curtains are not up
  • Drill pipe: – Drill pipe, 194 mm × 7.62 m (75⁄8 in × 25 ft): - 194 mm (75⁄8 in) diameter, 7.62 m (25 ft) long, 152 mm (6 in) BECO threads - For use with 16 m mast – Drill pipe, 194 mm × 7.62 m (75⁄8 in × 25 ft): - 219 mm (85⁄8 in) diameter, 7.62 m (25 ft) long, 152 mm (6 in) BECO threads - For use with 16 m mast – Drill pipe, 194 mm × 9.14 m (75⁄8 in × 30 ft): - 194 mm (75⁄8 in) diameter, 9.14 m (30 ft) long, 152 mm (6 in) BECO threads - Recommended for 13 m mast DTH starter steel – Drill pipe, 194 mm × 9.14 m (75⁄8 in × 30 ft): - 219 mm (85⁄8 in) diameter, 9.14 m (30 ft) long, 152 mm (6 in) BECO threads - Recommended for 13 m mast DTH starter steel – Drill pipe, 194 mm × 10.67 m (75⁄8 in × 35 ft): - 194 mm (75⁄8 in) diameter, 10.67 m (35 ft) long, 152 mm (6 in) BECO threads - For use with 10 m mast – Drill pipe, 194 mm × 10.67 m (75⁄8 in × 35 ft): - 219 mm (85⁄8 in) diameter, 10.67 m (35 ft) long, 152 mm (6 in) BECO threads - For use with 10 m mast – Drill pipe, 194 mm × 12.19 m (75⁄8 in × 40 ft): - 194 mm (75⁄8 in) diameter, 12.19 m (40 ft) long, 152 mm (6 in) BECO threads - For use with 13 m mast – Drill pipe, 194 mm × 12.19 m (75⁄8 in × 40 ft): - 219 mm (85⁄8 in) diameter, 12.19 m (40 ft) long, 152 mm (6 in) BECO threads - For use with 13 m mast
  • Clean: – Blow down hose with nozzle: - Clean with air
  • Dust control: – Spray water on dirt when tramming starts – For use with water injection
  • Winch control: – Winch control, remote: - Remote pendant winch control
  • Platform: – Tank platform, fire suppression: - Holds up to three (3) of 113 kg (250 lb) tanks
  • JIB crane: – JIB crane, pedestal control: - Mounted on drill deck – JIB crane, remote control: - Radio remote control
  • Start up commissioning: – Factory service engineer on site for 12 working days to direct start-up and commissioning, and provide hands-on maintenance and operation training
  • POWER TRAIN
    •  Engine, Cat C32 ACERT, Tier 2/Stage II equivalent, 1,800 rpm
    •  Manifold covers, turbo and exhaust
    •  Engine fire frame
    •  Fire wall, engine and hydraulic drive
    •  Exhaust pipe blankets
  • MAST
    •  Hole diameter, up to 311 mm (121⁄4 in)
    •  Rated capacity, up to 383 kN (86,000 lbf)
    •  Pulldown/hoist system, single cylinder
    •  Rotary drive, dual motors
    •  0-137 rpm, 0-17 313 N·m (0-12,769 lbf-ft) maximum torque
    •  Angle drilling, up to 30 degrees
    •  Mast locks and indicator in cab
    •  Auto cable tensioning system
    •  Hydraulic Operated Break-Out wrench (HOBO)
    •  Shear bolt deck wrench cover
    •  Dust hood with hinged quick change dust seal
    •  Remote thread lube system
    •  Mast lanyard mounting plates
  • OPERATOR ENVIRONMENT
    •  Cab, shock mounted, insulated
    •  Two-man extra-large FOPS
    •  Cat operator seat with air suspension
    •  Trainer’s seat
    •  Operator’s console: split with stainless steel panels
    •  Electric controls for drilling, tramming, leveling and auxiliary functions
    •  Dome lights, overhead interior
    •  Dash light
    •  Two (2) hinged doors, heavy duty latching
    •  Twelve (12) windows
    •  Full front drill window
    •  Roof window with protective cage
    •  Windshield wipers, washer tank kit
    •  Air conditioning/heating/pressurizing roof mounted, hydraulic driven
    •  Cab ladder, roof platform and railing
    •  Electric horn
    •  Slope indicators
    •  CD stereo kit with speakers
    •  24V to 12V converter
    •  English control system display text may be changed to other languages
    •  Electronic Control Module (ECM)
    •  HMI touch screen control
    •  Drill performance monitoring and diagnostics system
    •  Drill depth meter
    •  Travel stop, virtual rotary head
    •  Jack/tram interlock
    •  Tram interlock, pipe in hole
    •  Tram interlock: mast up and locked or down and parked
    •  Mast lock indicator
    •  Tram speed select interlock: high only when mast is down
    •  Tram interlock: machine outside stability limits
    •  Drill function interlock mast up and locked
    •  Head clear interlock: rotary drive clear of carousel
    •  Winch interlock
    •  Pipe positioner sensor
    •  Jack pressure sensor
    •  Rotary head RPM gauge, digital
    •  Rotary torque control
    •  Electronic compressor control
    •  Filter indicators
    •  Pump drive gearbox temperature sensor
    •  Basic engine shut down timer
    •  Cab environment control: AC, filter indicator, heat, fan speeds
    •  Wiring for terrain interface
  • SAFETY AND SECURITY
    •  Air hose safety sleeves (whip socks)
    •  Hinged protective cage: for drill view window
    •  Battery and starter disconnects with lock-outs
    •  Eight (8) engine shut down buttons
    •  Tram alarm
    •  Strobe beacon on: – Cab and front left side of drill – Clearance light, mast crown
    •  Twenty (20) lights for night drilling
    •  Two (2) closed circuit cameras (front and left side) with monitor in cab
  • COOLING
    •  Shutdown switch, low coolant level
    •  Cooler fans, variable speed, ECM
  • Shutdown switch, low coolant level
    • Cooler fans, variable speed, ECM
      • FRAMES
        •  Four (4) leveling jacks: – Two (2) × 121.9 cm (48 in) rear – Two (2) × 152.4 cm (60 in) front
        •  Tow hooks, front end
        •  Lift lugs, for base machine without mast
        •  Mast raise cylinders, two stage
        •  Walkways, around the drill, 360 degrees
        •  Decks and walkways, slip resistant
        •  Hand rails, bolt-on with kick plates
        •  Swing up steps, access/egress
        •  Self-closing gates
        •  Stationary, rear deck
        •  Hydraulic viewing hatch with LED hatch viewing spot light
        •  Fixed dust curtains, four sides
        •  Rear deck bit storage box with aluminum cover
        •  Pipe loading guide roller
        •  Left rear swing gated handrail, dual gate
        •  Fuel tanks: – Two (2) tanks mounted below deck – 3217 L (850 gal) fuel – Manual and remote fill – Isolation valves
        •  Hydraulic tank with isolation valves and interlocks
        •  Cat maintenance free batteries
        •  Battery box, stainless, sliding drawer
        •  Cat remote jump start terminals
      • OTHER STANDARD EQUIPMENT
        •  Standard Caterpillar colors
        •  Foam injection connection
        •  Loop filters between hydraulic pumps and motors
        •  Return filters, hydraulic
        •  Auto lubrication system, centralized
        •  Feed traveling sheave lube provision
        •  Hydraulic pressure test points
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