Blast Hole Drill Rig Rock-Master B12A

Blast Hole Drill Rig Rock-Master B12A
Heavy Duty Down The Hole drill rig «Rock-Master» Model B12-A has been specifically conceived to be solid, energy efficient and reliable to enhance field productivity and to ensure easy maintenance. The rig is equipped with a heavy duty Cummins engine coupled with a high efficient compressor system that allows very low fuel consumption compared to the competition.

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The Cummins engines coupled with a high efficient compressor system allows a low fuel consumption from the competition.
Ergonomic high volume cab for operator’s comfort.
Operator thermal Cab “FOPS” mounted on articulated swing arm for easy vision operation
High-Trac undercarriage track frame that delivers up to 60 000 lbs of tractive effort to allow a great gradability in rough terrains.

Additional Information



Carrier : Tracks mounted
Drilling techniques : Blast Hole
Drilling applications : Blasting, construction

Weight and Dimensions

Lenght:........13.05 m <> 42’ - 10”
Width:............2.89 m <> 9’ - 6”
Height:...........3.55 m <> 11’- 66”
Approx. weight:......33792kg <> 74500lbs

Mobile-Undercarriage High-Trac

Tracks mounted steel shoes
Track length: 4.26m <> 14.0’
Triple grouser shoes width: 457mm <> 18”
Pressure applied brake system
Traction effort: 24947 kg <> 55,000lbs
Grade ability: 27° <> 52% (Engine max. 20°<> 36%)
Ground clearance: 381mm <> 15”
Independent tracks oscillation (±8°)
Frame specifically designed for rough drilling conditions
Travel speed: max. 4.8km/h <> 3.0mph

Power Unit

Electronic diesel engine QSK-19 ECM control (24 volts)
Power: 700hp @ 1800rpm
Operational fuel consumption: 74.87L/hr <> 19.78gall/hr
Fuel tank 1136L. <> 300galls
Filtering system two stage (Primary @ security)
Emission certification: U.S. EPA Tier 3, CARB Tier 3, EU Stage IIIA
Integrated control safety panel, 24 volts

Compressor unit (Dual performance)

Compressor (Sullair)
Heavy Duty, Energy efficient 1025cfm x 500psi x 1800rpm
Heavy Duty, Energy efficient 1165cfm x 350psi x 2100rpm
Type: Two stage oil floated screw air
Rating condition: Sea level & 20° C
Cooling: Air cooled radiator, charge-air, oil cooler
Intake modulation: Full range control for partial load
Intake filters: Two stage dry type
Controls: Pressure gauge, temperature gauge, air filter maintenance indicator

Compressor Safety device

High discharge temperature
High receiver pressure
High Inter stage temperature
High Inter stage pressure
Low oil pressure
Minimum pressure valve
Pressure relive valve

Hydraulic power unit & components

Pump drive: Two (2) variable displacement piston pumps, load sensing, pressure compensated, and one (1) piston pump dedicated for dust collector.
Hydraulic tank capacity 432 L. <> 114 gall.
Hydraulic oil cooler
Filtration system (5 micron)
Body valves assembly for complete controls (Tram, positioning and drilling)
Fittings and adapter type «OSFS & ORB»
Hydraulic hoses standard heavy duty
Air system supply «Dual mode 500psi & 350psi»
Automatic lubricator for the down the hole hammer
Automatic thread grease
Floating spindle, saving sub, bit basket
Camera infra-red vision 1 front /2 rear
Integrated safety system (Over heat, low level etc…)

Boom positioning

Boom: single section
Boom: swing: (30°/10°)
Tilt inclination: (15° below, 45° above the horizontal)
Dump: (±45° under, ±75° above from the vertical)
Oscillation: Left/ Right (-20° to +50° from the vertical pin #1)
Oscillation: Left/Right (+50° to -6° from the horizontal pin #2)
All hydraulic cylinders are equipped with integrated safety locks

Mast & Feed Assembly

Mast structure HD designed
Feed system hoisting and pull down power is provided by linkchain that use a hydraulic powered gear box controlled hydraulically for accurate trus
Pull down force: 17500lbs <> - 77.8Kn
Pull back capacity: 17500lbs <> 77.8Kn
Rotary head mounting plate is equipped with urethane antiwear plates
Wireless Jib winch operation capacity: 1200 lbs <> 544 kg

Drill Head

Rotary drive head: Euro-drill RH900
Torque capacity type motor 95: 5015lbf-ft <> 6800Nm
Rotation speed: 0 – 100rpm
Working pressure: 3600psi
Torque capacity type motor 98: 8113lbf-ft <> 11000Nm
Rotation speed: 0 – 86rpm
Working pressure: 3000psi
Automatic constant rotation power control
Swivel passage 50.8 mm <> 2”
Drive flange

Drilling table: Break-out

Swivel break-out retractable jaws (Swing torque 22436lb-ft)
Clamps retractable jaws (Clamps hold force 58560lb-ft)
Hydraulic « Centralizer»
Hydraulic adjustable skirt deflector
Max. opening of 222 mm <> 8¾’’

Carrousel – Standard

Carousel of (6+1) rods 20’ long <> 6.00m)
Stars «set» for 3½” to 5” dia. rods (Option)
*Note: only one set is included in the base price unit, pipes not included
Gate for loading pipe in horizontal position

Water Injection Pump

Model FMC L04
Double piston pump, Complete filtering system
Volume; 34 L/min <> 9 gal/min
Pressure: 38 bar <> 550 psig
Revolution speed: 500 rpm
Water tank «Stainless steel»: 1136 L/h <> 300 gall/h

Noise less cab «ROPS»

Fully thermal (Summer-Winter)
Vibration isolated seat and seat belt
Sound insulation environment less than 85 dBa
All function are controlled from cab
Panel view: Display all pressure/ shutdown alarm/ active controls/ meters
All glass is safety glass
Windshield double wiper
Working light for extended hour

Cab control panel (Joy sticks Hall effect CAN bus)

2 friendly Joysticks, full operational control
Process and dialogue module, 7” color display, “IFM”
Rotary and Joystick knob for display function reading “Grayhill”
CAN-bus keypads readings

“Air flow” tests results (Ext. temp.-30°)

Engine set-up at 1900rpm/500psi_Air-end flow 1200scfm @ 401psi.
Engine set-up at 2000rpm/350psi_Air-end flow 1300scfm @ 348psi.
Engine set-up at 2000rpm/500psi_Air-end flow 1350scfm @ 474psi.
Present reading theoretically fuel consumption drilling with factor 66% [65.09 L/HR_US gall 17.19 gall/HR]

Optional Equipment

Rear stabilizer
High pressure filter to pump
Angle & Dept indicator
Winter heating package (Engine/Comp .receiver/Hyd & Water tank/Battery)
Air grease gun
Drill pipe size conversion kit
Hydraulic winch 45000lbs <>20412 kg
Dust collector HLM900 for 6½” hole
Dust collector HXL900 for 8½” hole


Overseas packaging: 40 ft container
Inland shipment: Flatbed
* Some of the features are optional
** Subject to ground conditions, compressor or water / mud pump capabilities, type and a quality of drilling equipments used and driller skills
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  • Blast Hole Drill Rig Rock-Master
  • Blast Hole Drill Rig Rock-Master
  • Blast Hole Drill Rig Rock-Master
  • Blast Hole Drill Rig Rock-Master
  • Blast Hole Drill Rig Rock-Master
  • Blast Hole Drill Rig Rock-Master
  • Blast Hole Drill Rig Rock-Master
  • Blast Hole Drill Rig Rock-Master