Joy (former MTI), CMM2, Production Drill

In-the-hole production drills

Joy CMM2

  • ITH production drilling from 89 to 216 mm (3.5 to 8.5 in.)
  • Hole depths 183 m (600 ft.) down, 50 m (164 ft.) up
  • 360° tower rotation, enabling full-circle drilling without repining
  • 26” side shift
  • 15° forward tilt
  • Hydraulic remote control for all drilling functions
  • High-pressure water injection

Contact an account manager for more information

The CMM2 in-the-hole (ITH) production drill, including a hydraulic rod lock, breakout wrench, and pipe clamp, is designed specifically for easy rod change-outs in the field.

High performance and accuracy

The CMM2 features high-performance DHD cluster drills/reamers (up to 610 mm (24 in.)) for production stope slot raises and sublevel caving; these operating pressures up to 24 bar (350 psi) air pressure. The direct-connected rotary head and telescopic feed cylinder are standard. In addition, the CMM2 includes a hydraulic centralizer for accurate hole orientation.  

Mast and towers

The mast, with replaceable wear strips, features 360° tower rotation, which enables full-circle drilling without the need to repine. The CMM2 includes towers for rod lengths from 1.0 to 1.82 m (3 ft. 3 in. to 6 ft.), a 1.0 m (38 in.) tower slide, and dual-tower stabilizing jacks and hydraulic tower extension. 

 Hole diameter 89 to 165 mm 4.5 to 6.5 in.
 Hole length:
 Up
 Down

50 m
183 m 

164 ft.
600 ft. 
 Rod diameter 73 to 165 mm 2.88 to 6.5 in.
 Rod length 1.82 m 6 ft. 
 Operating weight 7,031 kg  17,000 lbs. 
 Maximum pulldown/pullback 8,165 kg  18,000 lbs. 
 Maximum torque at stall 4.339 Nm  3200 ft-lbs. 
 Gradeability 36.4%  20 degrees 

Key dimensions

 Total length: tower up 4.68 m  15 ft. 4.25 in. 
 Total length: tower down 4.10 m  13 ft. 5.625 in. 
 Operating width 1.278 m  4 ft. 6.25 in. 
 Height: tower down 2.56 m 8 ft. 5 in.
 Tower raise height 0.58 m 1 ft. 10.75 in.
 Mast radius 1.54 m 5 ft. 0.625 in. 
 Forward tilt maximum N/A 15 degrees
18 degrees
 Tram height 1.99 m 6 ft. 6.5 in. 
  • Tower slide offsets tower 0.5 m (19”) to each side of frame centerline
  • Towers for 1.52 m (5’) or 1.0 m (3’3”) rods
  • Lighting packages for both air and electric versions
  • Hydraulic oil cooler package
  • Dual rotation motors for added torque
  • Air drive or electric drive from tram and drill functions
    • 18.5 Kw (25 HP) piston air motor
    • 15 Kw (20 HP) TEFC electric motor and controls
    • 22.5 Kw (30 HP) TEFC electric motor and controls