CME-850XR Rubber Track Drill: Versatile, Powerful, and Maneuverable

Rough terrain or city streets
The CME-850XR is a rough-terrain drill on full rubber tracks that won’t damage most pavement. With only 3.9 psi ground bearing pressure, this rig can get you to locations inaccessible to even rubber-tired ATV drills. But it can also do your city jobs on concrete or asphalt streets and parking lots.

CME designed rubber track carrier
The CME track carrier is designed specifically to support the drill and the CME drill is designed specifically to fit the carrier. The result is a compact track drill with plenty of power. At just 8 feet 7 inches (2.6 m) tall with the mast stored, the CME-850XR is easily two feet shorter than any comparable drill mounted on a track carrier. This means a lower center of gravity and greater stability when negotiating steep terrain. And at only 8 feet (2.4 m) wide, no oversize permits required for transport.

Precise steering provides agility
Independent hydrostatic track drive allows you to counter rotate the tracks and turn in place so you can easily maneuver around or between objects. Two joystick controllers, one for each track, are conveniently located adjacent to the operator. A rocker switch on the top of each joystick controls the engine speed. The two speed drive motors providing maximum pulling power in low range and maximum speed in high range can be shifted on the fly.

ROPS protection
A roll-over protective structure is standard on the CME-850XR. It meets SAE specification J1040C and includes a front brush guard.

High torque rotary drive provides 15,410 ft/lbs (20,893 Nm) at the drill spindle
You get the torque you need for auger drilling up to 15 inch holes, as well as rotation speeds near 670 rpm for core drilling applications. With 5 forward gears and one reverse, there is a rotation speed and torque combination available for just about any situation. The rotary drive transmission is driven through a torque converter that provides shock overload protection.

Hydraulic feed and retract system provides 28,275 pounds (12,825 kg) of retract force and 18,650 pounds (8,460 kg) of down pressure
Twin hydraulic fuel cylinders mounted in line with the drill spindle give you precise control of force on the drilling tools. Flow and pressure controls let you dial in a specific feed rate and feed pressure. Retract rates of up to 90 feet (27.4 m) per minute let you add or remove drilling tools quickly.

Patented spindle brake stops rotation in an instant†
An emergency spindle brake stops rotation in less than one revolution. This system is activated by two conveniently located push button switches as well as strategically located wobble switches.

Slide bases make the job easier and quicker
A 15 inch (38.1 cm) in-out movement allows you to quickly move the drill off the borehole and align the sheaves for lifting tools with the cathead or any of the hoists. A 6 inch (15.2 cm) sideways movement gives you even more versatility. Aligning augers or rods when making connections is easy, or if a bit drifts off at an angle when you start a hole, you can quickly straighten it to a vertical position.

Angle drill drive line for quick set up on slopes
The angle drill drive line allows you to drill vertically with the carrier positioned on an uphill slope. That can eliminate the time consuming job of leveling the rig. This unique system is also very beneficial when drilling underneath ponds, storage tanks or other structures. When used with our patented continuous sample tube system, you even take soil samples while drilling angle holes.

Single engine = less shop time, more field time
Like every all-terrain drill we manufacture at CME, a single engine powers both drill and carrier which means less time in the shop servicing the machine and more time in the field. A single engine also means lower operating and maintenance costs throughout the life of the machine.

850XR Specifications

Engine

• Cummins QSB 6.7L (408 cubic inch) 6 cylinder turbocharged and charge air cooled diesel engine. U.S. EPA Tier 4 final emissions certified diesel engine with cold weather starting aid and engine protection shutdown systems.
  • Rated horsepower
    • Driving: 195 horsepower (145 kilowatt) @ 2,300 rpm
    • Drilling: 117 horsepower (87 kilowatt) @ 2,300 rpm

Carrier

• Track width
  • 27.5 in (69.9 cm)
• Tractive force
  • 44,525 lbs. (20,196 kg)
• Avg. ground bearing pressure
  • 3.9 psi (.274 kg/cm²)
• Zero turning radius
• Track drive
  • Hydrostatic closed-loop transmissions consisting of variable displacement piston pump, two-speed bent-axis piston motor, and double reduction planetary wheel drive.
• Hydraulic front winch
  • 20,000 lbs (9,072 kg) with two-speed motor
• Tool storage
  • Auger rack in front
  • Auger rack on deck, driller side
  • Rod rack on deck, helper side
  • Tool box on deck, helper side

Speed

• Low Range: 2.4 mph (3.86 kph)
• High Range: 5.0 mph (8.04 kph)

Gradeability

• Straight ahead climb
  • 60% grade
• Side-hill traverse
  • 40% grade

Rotary drive

• Transmission
  • 5 speed forward, 1 speed reverse
• Standard rotary drive
  • 15,410 foot pounds (20,893 Nm)
  • 670 rpm
• High speed rotary drive
  • 12,330 foot pounds (16,717 Nm)
  • 825 rpm
• Hollow spindle
  • Standard 2-3/4 inch I.D. (7 cm)
  • Optional 3-3/4 inch I.D. (9.5 cm)

Hydraulic feed system

• Retract force
  • 28,275 pounds (12,825 kg)
• Pulldown force
  • 18,650 pounds (8,460 kg)
• Retract rate
  • 35 feet (10.7 m) per minute
• Rapid retract rate
  • 90 feet (27 m) per minute
• Feed rate
  • 55 feet (17 m) per minute
• Stroke
  • 72 inch (183 cm)
• Mast
  • 26 feet (7.9 m) from ground to sheaves

Leveling system

• Hydraulic jacks, inverted design with chrome-plated piston rods enclosed at all times.
  • Stroke: 36 inch (91.4 cm)

850XR Optional Equipment

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. Systems available up to 6-5/8 inch (16.8 cm) capacity.

Automatic hammer†
The CME 140 pound (63.5 kg) automatic hammer has become the industry standard. It 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. Other hammer systems are available including a 170 pound (77 kg), 300 pound (136 kg), and 340 pound (154 kg).

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, it 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.

All-weather cab — ROPS Certified
For severe weather conditions, the CME-850X can be equipped with an all-weather ROPS cab. This cab is insulated and includes such features as an efficient heater, a defroster, a roll down left window and a windshield wiper.

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.

Cone Penetrometer Testing (CPT)
CPT controls allow you to easily switch from typical geotechnical drilling and sampling procedures to pushing a cone. A dedicated hydraulic circuit including detented CPT control lever, hydraulic down feed pressure and CPT feed rate controls provide precise pressure and penetration adjustments required to meet ASTM standards. A separate CPT system hydraulic pressure gauge is provided as well. Anchor points are installed below the drill feed frame so that maximum available pressure can be applied to the CPT tools. A 12-volt power source can be provided at the drill control panel to accommodate electronic devices associated with CPT procedures. Mounting for depth transducers or other related equipment can also be provided.

Additional optional equipment

• Water tank
• Work table, pipe vise options
• Auger and rod guides for angle drilling
• Stabilized water swivel
• Additional tool boxes available
• Spindle adapter
• Utility air tool system
• Cathead
• Hydraulic hoist
  • 1,800 pound (816 kg)
  • 3,200 pound (1,452 kg)
  • 7,000 pound (3,175 kg)
  • 8,500 pound (3,855 kg)
• Hydraulic wireline hoist
  • 1,800 pound (816 kg), max line speed 200 ft./min (61 m/min)
  • 900 pound (408 kg), max line speed 400 ft./min (122 m/min)
• Water pumps
  • Moyno 3L6 36 gpm/225 psi (136 lpm/1,551 kPa)
  • Moyno 3L8 84 gpm/225 psi (318 lpm/1,551 kPa)
  • Bean L09 (420) 25 gpm/500 psi (95 lpm/3,448 kPa)
  • Bean L1122 (435) 35 gpm/500 psi (132 lpm/3,448 kPa)
  • Other pumps available