Central Mine Equipment Company

- Model CME-55 - Track Carrier Auger Drill



When the CME-55 first rolled of the production line back in 1963, it was an immediate success. It had the power, versatility, and dependability to handle geotechnical and medium-sized environmental jobs with maximum efficiency. Although today’s CME-55 features many refinements, it’s basically the same drill that has been the standard of its class for more than 35 years. The popularity and the high resale value of this classic machine bear testimony to its performance record in the field. The CME-55 can be mounted on a variety of different carriers, including two wheel or all-wheel drive, single or tandem axle trucks. It can also be mounted on the CME-55T trailer or on the CME-300 tracked carrier.

The feed system

The hydraulic feed and retract system provides 28,275 pounds [12,826 kg] of retract force and 18,650 pounds [8,460 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. The split feed slide bushings are easily replaced after normal wear intervals, and the standard upright gives you the clearance to drill with up to 10 1/4 inch hollow augers.

The rotary box

Rugged mechanical rotary drive provides 7,700 foot pounds [10,440 Nm] of torque and rotary speeds of up to 800 rpm.

Other rotation and torque combinations are available, including a high-torque rotary drive that gives you up to 9,400 foot pounds [12,744 Nm] of torque and a high-speed rotary drive that gives you up to 665 rpm. The five speed transmission is connected to the drill engine through a heavy-duty 13 inch clutch. With five forward gears and one reverse, there is a rotation speed and torque combination for just about any situation. The mechanical drive system also gives you a better feel for drilling conditions down the hole. It allows you to sense the need for changes in feed pressure and rotational torque.

Control logic – the key to driller productivity

All drilling and set-up controls are logically arranged on the control panel located at the drillers’ station.

The most commonly used functions, such as the feed, hydraulic hoist, and sliding base levers are staggered for easier identification and operation. Also a lock out position for the clutch lever to prevent accidental engagement.

Patented Spindle Brake stops rotation in a instant

Our emergency Spindle Brake can stop rotation in less than a revolution. The system is activated by two conveniently located push button switches as well as strategically located multi directional wobble switches.

Tool box combinations

Numerous tool box, water tank, auger and rod storage configurations are available

Plenty of auger storage available

The CME-55 300 Carrier comes standard with plenty of auger storage at the front of the carrier without compromising approach angle of the carrier.


  • Cummins QSB 4.5L [275 cubic inch] 110 horsepower [82 kilowatt] 4 cylinder turbocharged diesel engine. U.S. EPA Tier 3 emissions certified.


  • Track Width
    • 17.7 in [45 cm]
  • Avg. ground bearing pressure
    • 4.5 psi [.309 kg/cm2]
  • Suspension
    • Triple walking beams
  • Turning Radius
    • In place
  • Drive
    • Hydraulic motor/planetary wheel drives
  • Optional 2 Speed drive
    • Low Speed: 0-1mph
    • High Speed: 0-2mph
  • Steering
    • Remote radio controlled guidance
  • Hydraulic front winch
    • 12,000 lbs [5,443 kg]
  • Auger and rod racks
    • Standard
  • Tool boxes
    • Standard


  • Straight ahead climb
    • 50% grade
  • Side-hill traverse
    • 36% grade

Rotary drive

  • Clutch, heavy duty
    • 13 inch [33 cm]
  • Transmission
    • 5 speed forward, 1 speed reverse
  • Standard Rotary Box
    • 7,700 foot pounds [10,440 Nm] max
    • 800 rpm max
  • High Torque Rotary Box (optional)
    • 9,400 foot pounds [12,744 Nm] max
    • 665 rpm max

Hydraulic feed system

  • Retract force
    • 28,275 pounds [12,826 kg]
  • Pulldown force
    • 18,650 pounds [8,460 kg]
  • Retract rate (max)
    • 35 feet [10.6 m] per minute
  • Rapid Retract rate (max)
    • 90 feet [27.4 m] per minute
  • Feed Rate (max)
    • 55 feet [16.7 m] per minute
  • Stroke
    • 72 inch [183 cm]

Leveling system

Four 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 SPT 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 safety, 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.

Auger and rod storage

Above deck auger and rod racks are provided with the drill platform.

Several tool box, water tank, auger and rod storage configurations are 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 drills in-out slide base. This pulls the sockets on the upright drill frame away from the large tapered pins on the mast.

Angle drilling system for special applications

This unique system allows you to drill holes at various angles between horizontal and vertical. It is especially effective for drilling under 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 rig positioned on an uphill slope. That can eliminate the time consuming job of leveling an area on which to place the rig.

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.

Additional optional equipment

  • Water tank
  • High torque rotary drive
    • 9,400 foot pounds [12,744 Nm] max
  • Auger and rod guides for angle drilling
  • Mast (from base of frame to sheaves)
    • 20 foot [6.0 m]
    • 22 foot [6.7 m]
  • 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 85 ft./min [26 m/min]
      • Down max line speed 340 ft./min [104 m/min]
    • 8,500 pound [3,856 kg],
      • Up max line speed up: 72 ft./min [61 m/min]
      • Down max line speed down: 310 ft./min [61 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]
    • Other pumps available

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