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Roto-Mill™ RM-6

3 or 4 Track Cold Planers

CMI's newest generation of Roto-Mills are designed with a modular concept so that the RM-6 can be configured as a three or four track machine depending upon the customers operational preference, while large access doors allow easy inspection, adjustment and repair.

Roto-Mills feature a unique cutter housing geometery to quickly discharge liberated materials onto high capacity discharge and truck loading conveyors, the RM-6 on-board 675hp Tier 4 Final powerplant is mounted behind the fuel tanks at the optimum location close to the cutter for more stability and less vibration.

  • Incorporates CMI’s extensive experience in milling to provide an efficient, high performance mill
  • Attention to detail results in improved maintenance access and reduced service time
  • Best in class conveyor capacity means less tooth wear and better productivity
  • On-board diagnostics and manuals provide ease of maintenance and reduced downtime


Folding Secondary Conveyor
Allows reduced shipping length for easier transportation and can be equipped with optional scale and camera so the operator can monitor truck fill.
CAN-Bus System Architecture
Industry standard components reduce wiring and interconnections providing greater reliability and ease of troubleshooting.
Mounted behind the fuel tanks at the optimum center of gravity location - putting the weight closer to the cutter for more stability & less vibration during milling. Moving the engine away from the operator platform reduces noise and heat, increasing operator comfort & safety.

Engine Mounted Pumps
Our industry exclusive front engine mount pump drive is a highly reliable, proven design that allows belts and pumps to be changed easily from the front of the engine.
Easy Access
Fully opening gull wing engine cover doors lift up to reveal all service items such as air cleaners, batteries, belts and filters.
rm 6 diagram

Primary & Secondary Conveyors
CMI’s industry leading 42” wide primary & secondary discharge belts provide greater material evacuation from the housing allowing the machine to operate at a faster, more efficient cut rate with far less cutting tooth and holder wear.
Fuel and Water Storage
Largest storage capacity in its class results in longer running time and less downtime.
Skid Mounted Powerpack
Side platforms allow walk-in access to the engine compartment. The skid mounted engine has clearance from below for easy access for maintenance and repair.
Slim Profile
A slimmer, streamlined profile provides greater visibility and a better sight line for the operator to the ground.
Power Lift Rear Door
Fan assembly is lifted with hydraulically actuated rear door allowing ground level access to maintain cooling system.

Touch Screen Control System

Standard control package features the largest (12”) high resolution, high contrast graphic control screen in the industry providing excellent visibility during day and night operation.

Cutter Drum

Full range movement lift and hinge cutter door provides efficient and easy access for tooth change out and replacement.

Conveyor Components

Catenary style suspended idlers with rubber impact rings provide for easy maintenance over fixed idler designs.

Modular System Design

Our modular control system design approach using common parts provides redundancy, reduces spares requirements and allows us to easily add additional functions and control options.

Easy Maintenance

Centralised lubrication points make regular maintainence simple while all engine fluids fill/check locations are easily reached via walkways and oil filters are easily accessible from the ground.

Easy Troubleshooting

Multiple lower level screens identify the location of problems and provide simple “smart” status codes to allow for easy maintenance and troubleshooting.



Three (3) wide angle cameras mounted to provide additional visibility
CMI REMOTE MONITORING: Cellular modem with intergration to machines CAN network, allows remote monitoring
Canopy to cover operators station
Moba 2D/ Topcon 2D Grade control system


Cummins QSX 15, 15L 675 hp (503 kW) @ 1875 rpm
Turbo charged after-cooled diesel engine, Tier 4 final
Hydrostatic drive 
Variable speed ground drive motors with anti-spin
Wide tracks with replaceable polyurethane pads, driven via planetary gearboxes
3 & 4 Track: 14” (356 mm) wide front and rear
76” (1930 mm) with 75" (1905 mm) cut
0-3.2 mph (0-5 kph)
36” (914 mm) wide primary and secondary conveyors
120º swing secondary conveyor (folding option available)
Full length dust covers and easy maintenance idlers
Right and left operators panels with dual joysticks
24v system with interchangeable switch modules
Centre mounted pivoting 12” full colour LCD display
Backlit operators console and ground control boxes
Control system displays faults in plain text
Operators manuals retrievable on screen
Belt drive from engine mounted clutch
Housing mounted Fairfield W-50 planetary reducer
Rear door lifts and pivots for increasing access
75” (1905 mm) wide standard cutter - optional: 86" (2184 mm)
44” (1118 mm) tooth tip diameter
13” (330 mm) maximum cut depth
Fuel: 315 gal (1192 l)
Hydraulic fluid: 45 gal (170 l)
Water: 935 gal (3539 l)
Shipping height: 9’ 8” (2946 mm)
Shipping length: 44’ (13411 mm)
Overall length: 53’ 1” (16180 mm)
Overall width: 7’ 8” (2337 mm)
Overall height: 18’ 7” (5664 mm)
3 Track: 68,000 lbs (30844 kg)
4 Track: 72,000 lbs (32659 kg)

Find Out More


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Roto-Mill RM-6 / RM-7 Brochure
Only registered and logged in users can download this file.
Cold Planers Brochure