Central Mine Equipment Company

- Model CME-75 - Truck Mounted Auger Drill



Ever wonder why there are so many CME-75 drills out there in the field? It’s really quite simple. With over 20 years of field experience, the CME-75 has earned a reputation second to none for outstanding performance and dependability.

Feed System

Hydraulic feed and retract system provides 30,000 pounds [13,607 kg] of retract force and 20,000 pounds [9,071 kg] of down pressure.

The 72 inch [183 cm] stroke, hydraulic vertical drive system has no chains or cables which can stretch. It gives you precise control of force on the drilling tools.

For exceptional drilling efficiency the feed system has two separate controls. One gives you manual control of the feed and retract and the other features detent feed and fast retract positions. Retract rates of up to 78 feet [24 m] per minute let you add or remove drilling tools quickly. Pressure controls let you dial in a specific feed rate and pressure. This system is extremely advantageous in core drilling and other operations that require precise control of feed. And since the two controls are isolated, you can use the manual control without changing the pressure settings for the detent feed control.

Control logic – the key to operator productivity.

Drilling and setup controls are logically arranged on a control panel at the driller’s station. The most frequently used controls, such as feed, hydraulic hoists, and sliding base levers, are staggered for easier identification and operation.

Rugged mechanical rotary drive provides 10,230 foot pounds [13,870 Nm] of torque, plus high rotation speed when you need it.

You get the torque you need for auger drilling, as well as rotation speeds over 740 rpm for rotary or core drilling applications. Other optional rotation speed and torque combinations are also available, including a high-torque rotary drive that gives you 12,950 foot pounds [17,557 Nm] of torque.

With five forward gears and one reverse, there’s a rotation speed and torque combination available for just about any situation. The transmission is connected to the drill engine through a heavy-duty 13 inch [33 cm] clutch. And since the transmission does not travel vertically with the spindle, you won’t find yourself unable to change gears when you’re at the top of a feed stroke. A torque limiting clutch provides protection against shock overload.

Patented Spindle Brake stops rotation in an instant.

Our emergency spindle brake can stop rotation in less than a revolution. This system is activated by two conveniently located push button switches as well as strategically located multi-directional wobble switches.


  • Cummins QSB 6.7L [409 cubic inch] 133 horsepower [99 kilowatt] 6 cylinder turbocharged and charge air cooled diesel engine. U.S. EPA Tier 3 emissions certified diesel engine.

Rotary drive

  • Clutch, heavy duty
    • 13 inch [33 cm]
  • Transmission
    • 5 speed forward, 1 speed reverse
  • Standard Rotary Box
    • 10,230 foot pounds [13,870 Nm] max
    • 740 rpm max
  • High Torque Rotary Box (optional)
    • 12,950 foot pounds [17,557 Nm] max
    • 580 rpm max
  • High Speed Rotary Box (optional)
    • 8,180 foot pounds [11,090 Nm] max
    • 930 rpm max

Hydraulic feed system

  • Retract force
    • 30,000 pounds [13,608 kg]
  • Pulldown force
    • 20,000 pounds [9,072 kg]
  • Retract rate (max)
    • 30 feet [9 m] per minute
  • Rapid Retract rate (max)
    • 78 feet [24 m] per minute
  • Feed Rate (max)
    • 48 feet [14 m] per minute
  • Stroke
    • 72 inch [183 cm]

Leveling system

Hydraulic jacks, inverted design with chrome-plated piston rods enclosed at all times.

  • Stroke
    • 36 inch [91.4 cm]

Hydraulic rod holder and breakout wrench

The hydraulic rod holder makes your job quicker and safer. It not only pivots from on-hole to off-hole positions, but also hydraulically moves in and out. For efficient operation, the breakout wrench is mounted at the pivot point of the rod holder arm.

Automatic hammer

Our 140 pound [63.5 kg] automatic hammer gives you extremely consistent and accurate Standard Penetration Test results, meeting all ASTM-D-1586 requirements. That’s because there are no ropes or cables to impede the free fall of the weight. The hammer swings from stored position to on-hole position. Since raising and lowering is done hydraulically, set up is quick and almost effortless. For maximum saftey, all moving parts are enclosed, including the impact area between the weight and the anvil. A 340/140 pound [154/63.5 kg] hammer is also available.

Quick mast disconnect

This feature allows you to quickly disconnect the mast when working inside buildings, underneath bridges or in other low overhead drilling locations. Since the mast is completely separated from the upright, is doesn’t interfere with other drill functions such as the in-out slide base.

With the mast in the horizontal position, you simply clamp it to its storage rack and extend the drill’s in-out slide base. This pulls the sockets on the upright drill frame away from the large tapered pins on the mast.

Patented angle drilling system

This unique system is especially effective for drilling underneath ponds, storage tanks, or other structures. When used with our patented continuous sample tube system, you can even take soil samples while drilling angle holes.
The angle drilling system will also allow you to drill vertically with the carrier positioned on an uphill slope. That can eliminate the time-consuming job of leveling an area on which to place the rig.

And, since the kelly drive is directly connected to the right angle drive box, you can raise and lower the mast with the drivetrain already connected and ready to go.

Fluted kelly and chuck assembly

If your drilling operations include a substantial amount of rotary or core drilling, the CME fluted kelly and chuck assembly can save you a lot of time. The 5 foot [1.5 m] stroke of the kelly combined with the 6 foot [1.8 m] stroke of the feed system, gives you a total stroke of 11 feet [3.4 m]. You can use 10 foot [3 m] drill rods, which means fewer rod connections and less rod handling.

The kelly has two vertical slots (flutes) and two sets of horizontal slots which are engaged by the chuck to provide rotary torque and thrust. The CME fluted kelly can even be rotated without engaging the thrust keys. This gives you the option of using the weight of the drill string to provide down pressure on the bit.

The 2 5/8 inch [6.7 cm] fluted kelly and chuck assembly is available in either manual or hydraulic actuated configurations. Or if you are drilling larger diameter holes, a 3 1/2 inch [8.9 cm] O.D. fluted kelly and hydraulic chuck assembly is available.

Additional optional equipment

  • Drill platform
  • Continuous sample tube system
  • High torque rotary drive
    • 12,950 foot pounds [17,557 Nm] max
    • 580 rpm max
  • High speed rotary drive
    • 8180 foot pounds [11,090 Nm] max
    • up to 930 rpm max
  • Auger and rod guides for angle drilling
  • Quick mast disconnect
  • Mast (from base of frame to sheaves)
    • 22 foot [6.7m]
    • 25 foot [7.6m]
    • 26 foot [7.9m]
    • 29 foot [8.8m]
  • Cathead, 8 inch [20.3 cm] diameter
  • Hydraulic hoist
    • 1,800 pound [816 kg], max line speed 200 ft./min [61 m/min]
    • 3,200 pound [1,452 kg], max line speed 100 ft./min [30.5 m/min]
    • 7,000 pound [3,175 kg]
      • Up max line speed 76 ft./min [23 m/min]
      • Down max line speed 327 ft./min [100 m/min]
    • 8,500 pound [3,855 kg]
      • Up max line speed 62 ft./min [19 m/min]
      • Down max line speed 267 ft./min [81 m/min]
  • Hydraulic wireline hoist
    • 900 pound [408 kg], max line speed 400 ft./min [122 m/min]
    • 1,800 pound [816 kg], max line speed 200 ft./min [61 m/min]
  • Water pumps
    • Progressing cavity
      • 36 gpm/225 psi [136 lpm/1,551 kPa]
      • 84 gpm/225 psi [318 lpm/1,551 kPa]
    • Triplex piston
      • 25 gpm/500 psi [ 95 lpm/3,448 kPa]
      • 35 gpm/500 psi [132 lpm/3,448 kPa]
    • Duplex piston
      • 148 gpm/197 psi [560 lpm/1,358 kPa]
    • Other pumps available

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