Overview
Cat® PM312 Cold Planers with integrated Cat Grade and Slope technology and the latest System K rotors are equipped to deliver performance, productivity and cutting precision. A comfortable operator environment puts intuitive controls at your fingertips, while long service intervals and easy maintenance access help simplify service. Although designed for a single operator, the PM312 includes features for supporting ground personnel. Many options are available to enhance machine versatility when optimum maneuverability or high production capabilities are required.
Specifications
Units:
| Milling Width | — |
| Rated Power | — |
| Operating Weight | — |
Benefits & Features
Efficient Performance
- Cat® C9.3B engine meets U.S. EPA Tier 4 Final, EU Stage V, and Korea Stage V emission standards and delivers an increase in power density along with the latest electronic, fuel, and air systems compared to the previous Cat C9.3 engine
- Engine Idle Speed Management and multiple rotor speeds allow for optimal output and demand on the engine
- A variable-speed cooling fan operates at the lowest possible speed for quiet and efficient cooling
- Automatic Load Control monitors demand on the engine and adjusts milling speed to help prevent stalls while maintaining high production
Maneuverability and Control
- The reliable track undercarriage leverages proven designs from Cat mini excavators and uses an automatic tensioning system for consistent performance and longer track life
- A robust propel system features dual displacement motors at each leg post, utilizing a cross-drive pattern for additional traction in straight cuts
- Automatic traction control helps maintain consistent speed in the most challenging applications
- The articulating right rear leg can be easily positioned outside to help provide extra stability and traction in demanding cuts or positioned in front of the rotor chamber for flush cutting
- An optional ballast weight kit is available to add weight over the rotor for increased cutting capability in more demanding applications
- Electronically switch rotor speeds during operation
Effective Material Removal
- High-capacity conveyors efficiently remove milled material with variable speed discharge control
- A wide opening and seamless belt effectively clear the rotor chamber
- Adjust the belt speed to match material type and production rate
- The belt reverses direction to easily remove material from the conveyor during clean-up, and easy-access covers allow for quick inspection and cleaning of the rollers
- Conveyor folds for transportation and maintenance
December 3, 2025
Specifications
Units:
| Milling Width | — |
| Maximum Milling Depth | — |
| Rotor Speeds | 97 / 109 / 121 rpm |
| Number of Bits | 106 |
| Rated Power | — |
| Engine | C9.3B |
| Maximum Travel Speed | — |
| Maximum Milling Speed | — |
| Operating Weight | — |
| Transport Weight | — |
| Operating Length - Conveyor Up | — |
| Operating Width | — |
| Height - Canopy | — |
| Maximum Truck Clearance | — |
| Minimum Right Cutting Radius | — |
| Minimum Left Cutting Radius | — |
| Conveyor Swing | ±60 degrees from center |
| Transport Length | — |
| Transport Width | — |
| Transport Height | — |
| Cooling System | — |
| Diesel Exhaust Fluid (DEF) Tank | — |
| Water Spray System Tank | — |
| Fuel Tank | — |
| Hydraulic Tank | — |
| Engine Oil | — |
Benefits & Features
Efficient Performance
- Cat® C9.3B engine meets U.S. EPA Tier 4 Final, EU Stage V, and Korea Stage V emission standards and delivers an increase in power density along with the latest electronic, fuel, and air systems compared to the previous Cat C9.3 engine
- Engine Idle Speed Management and multiple rotor speeds allow for optimal output and demand on the engine
- A variable-speed cooling fan operates at the lowest possible speed for quiet and efficient cooling
- Automatic Load Control monitors demand on the engine and adjusts milling speed to help prevent stalls while maintaining high production
Maneuverability and Control
- The reliable track undercarriage leverages proven designs from Cat mini excavators and uses an automatic tensioning system for consistent performance and longer track life
- A robust propel system features dual displacement motors at each leg post, utilizing a cross-drive pattern for additional traction in straight cuts
- Automatic traction control helps maintain consistent speed in the most challenging applications
- The articulating right rear leg can be easily positioned outside to help provide extra stability and traction in demanding cuts or positioned in front of the rotor chamber for flush cutting
- An optional ballast weight kit is available to add weight over the rotor for increased cutting capability in more demanding applications
- Electronically switch rotor speeds during operation
Effective Material Removal
- High-capacity conveyors efficiently remove milled material with variable speed discharge control
- A wide opening and seamless belt effectively clear the rotor chamber
- Adjust the belt speed to match material type and production rate
- The belt reverses direction to easily remove material from the conveyor during clean-up, and easy-access covers allow for quick inspection and cleaning of the rollers
- Conveyor folds for transportation and maintenance
Durable Cutting System
- The rotor drive system is engineered to maximize torque transfer and features a heavy-duty dry clutch, dual stage belt drive and automatic belt-tensioning
- Durable, reinforced cutting chamber
- Hardened full-length side plate skis, inboard ski shoe, and anti-slab shoes are designed to reduce wear and maintenance
High Production System K Rotors
- Cat System K rotors can be used for numerous applications and feature efficient material flow with a uniform cutting pattern
- A fastener-free design secures toolholders in place without a retaining pin, bolt or setscrew, speeding up replacement and eliminating the need for torquing
- Toolholders, base blocks and kicker paddles are built from high-strength alloy steel that’s abrasion resistant for extended life
- Optional Cat Diamond bits are designed to stay sharp and last significantly longer than a carbide bit (ideal for bituminous applications without obstacles such as interstates or motorways)
Comfortable Work Environment
- Operate in comfort with a standard suspension seat, adjustable right arm console and intuitive, ergonomic controls
- A sliding operator station extends up to 215 mm (8.5 in) to provide improved visibility to the cutting edge
- Work areas are illuminated for nighttime operation with backlit keypads and wide-dispersion LED or halogen lighting options
- An optional hydraulically-powered canopy with extendible wing and handrail-mounted windscreen help protect the operator from sun, wind, and rain
- Better direct exhaust up and away from ground personnel or when milling close to buildings with the optional and stowable exhaust diverter
- Maximize dust removal from the working areas with the optional dust abatement system
Easy Operation
- Access integrated technology and automated systems through easy-to-use controls and a highly intuitive touchscreen interface
- Displays provide access to the gauge cluster, operating information, grade and slope, remote camera feeds, machine controls and diagnostics
- An optional grade control display can be positioned in the operator station or on the back of the machine to enable interaction with the grade system from the ground level
- A 14-button ground-level keypad gives ground operators convenient access to various machine functions (leg height, water spray, sideplates, moldboard and lights)
- A Standby/Resume button pauses major machine functions and lowers engine speed to conserve fuel during truck exchanges, and when ready to resume milling a push of the button automatically brings the machine back up to production at the same speed
- Once a rotor speed is selected and the cutting pattern is established, use of the Cruise Control button stores the propel speed and repeatedly returns to that same speed for every pass, and when used in combination with Standby/Resume allows for easy and precise pattern control
- Cut closer to obstacles on either side with the assistance of optional remote cameras and adjustable on-screen guidance lines
Integrated Cat Technology
- Access integrated technology and automated systems through easy-to-use controls and a highly intuitive touchscreen interface
- Displays provide access to the gauge cluster, operating information, grade and slope, remote camera feeds, machine controls and diagnostics
- An optional grade control display can be positioned in the operator station or on the back of the machine to enable interaction with the grade system from the ground level
- A 14-button ground-level keypad gives ground operators convenient access to various machine functions (leg height, water spray, sideplates, moldboard and lights)
- A Standby/Resume button pauses major machine functions and lowers engine speed to conserve fuel during truck exchanges, and when ready to resume milling a push of the button automatically brings the machine back up to production at the same speed
- Once a rotor speed is selected and the cutting pattern is established, use of the Cruise Control button stores the propel speed and repeatedly returns to that same speed for every pass, and when used in combination with Standby/Resume allows for easy and precise pattern control
- Cut closer to obstacles on either side with the assistance of optional remote cameras and adjustable on-screen guidance lines
Simple Service, Low Maintenance Costs
- Daily maintenance areas are easily accessible through large service doors
- Track components do not require routine maintenance and easy to replace track pads help lower service costs
- Standard ground-level controls and an optional hydraulically-operated rotor turning device simplify bit removal and replacement
- High and low pressure washdown options connect to the onboard water tank for convenient clean-up
- The accessory drive system allows use of select machine functions when the engine is off
- Electrical system wiring is color-coded and numbered for easy identification and wrapped in a protective, abrasion-resistant nylon braid for longer life
- Monitor fluid conditions with regular sampling to help extend change intervals up to 500 hours engine oil, 6000 hours hydraulic oil and 12000 hours coolant
- Built-in diagnostics monitor machine systems, alert the operator of performance issues and provide troubleshooting information
- VisionLink® takes the guesswork out of managing your entire fleet–regardless of size or equipment manufacturer*–by providing maintenance needs, machine hours, location, fuel usage, idle time, diagnostic codes, and more through interactive dashboards on your mobile device or desktop, helping you make informed decisions that lower costs, simplify maintenance, and improve safety and security on your jobsite
- Remote Flash allows you to update onboard software without a technician being present, allowing you to initiate software updates when convenient, increasing your overall operating efficiency**
- Remote Troubleshoot allows your Cat dealer to perform diagnostic testing on your connected machine remotely**
- Cat Inspect is a mobile application that allows you to easily perform digital preventative maintenance checks, inspections, and daily walkarounds
- Convenient parts availability, dealer locations and service repair kits simplify ordering of high wear components
* Data field availability can vary by equipment manufacturer and is provided through an application programming interface (API).
** Must be within cell range coverage.
Sustainability
- The Cat C9.3B engine meets U.S. EPA Tier 4 Final, EU Stage V and Korea Stage V emission standards
- Cat U.S. EPA Tier 4 Final, EU Stage V, and Korea Stage V Final diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels* up to: 20% biodiesel FAME (fatty acid methyl ester) or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
- Engine Idle Speed Management helps maximize fuel efficiency and reduce greenhouse gas emissions by elevating engine speed to an intermediate idle to complete specific tasks and returning to low idle when finished.
- Automatic Load Control helps you save fuel and reduces greenhouse gas emissions by automatically matching milling speed to engine load for maximum production at peak efficiency.
- Standby/Resume pauses major machine functions and lowers engine speed to conserve fuel and helps reduce greenhouse gas emissions during truck exchanges.
- Traction Control maintains consistent traction to increase machine efficiency, helps reduce fuel burn and greenhouse gas emissions.
- Cat Scheduled Oil Sampling (S•O•SSM) Services helps reveal excessive wear, contaminated fluids or other “unseen” issues that can shorten component life. In many cases, you can extend oil and coolant change intervals by using fluid monitoring. Consult your Cat dealer or the machine’s operation and maintenance manual for more information.
- Cat Grade with Grade and Slope for cold planers allows for accurate material planning to help reduce overages during the paving process and increase final project quality for a longer lasting road surface.
- Don’t waste fuel idling. Cat VisionLink online fleet monitoring helps you manage idle time and reduce fuel burn and greenhouse gas emissions.
- VisionLink displays the CO2 emissions for monitored assets, calculated by fuel type for the Runtime Fuel Burned each day in a selected date range.
* Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels.
Data not available.
Standard Equipment
- NOTE
- Features, standard and optional equipment may vary by region. Please check with your local Cat dealer for specific offerings and availability in your area.
- OPERATOR ENVIRONMENT
- Sliding operator station
- Suspension seat
- Ergonomically-adjustable arm rest
- Ground control keypad
- High-resolution LCD touchscreen display
- 12-Volt power receptacle
- CAT® TECHNOLOGY
- Remote Flash
- Remote Troubleshoot
- Cat Grade and Slope
- VisionLink® telematics
- POWERTRAIN
- Engine Idle Speed Management
- High capacity cooling system
- Automatic Load Control
- HYDRAULIC SYSTEM
- Traction Control
- ROTOR SYSTEM
- Automatic plunge-cut
- Automatic grade and slope transition feature
- Obstacle jump
- Three cutting speeds
- SERVICE AND MAINTENANCE
- Scheduled Oil Sampling (S·O·S℠) Ports
- Platform-level engine oil dipsticks
- Rotor chamber water spray system
- 1260 L (332.9 gal) onboard water tank
- Side water fill valve
- Water tank fill pump
- SAFETY AND SECURITY
- Platform handrails
- Signaling/warning horn
Optional Equipment
- NOTE
- Features, standard and optional equipment may vary by region. Please check with your local Cat dealer for specific offerings and availability in your area.
- OPERATOR ENVIRONMENT
- Additional high-resolution LCD touchscreen display
- Powered canopy
- Windscreen
- Exhaust diverter
- CAT® TECHNOLOGY
- Sonic grade control sensors
- High-resolution LCD touchscreen display (for ground level grade controls)
- CONVEYOR
- Dust extraction system
- Hydraulically folding conveyor
- Mechanically folding conveyor
- Additional spray bars (dust control)
- POWERTRAIN
- CE certificate
- HYDRAULIC SYSTEM
- Cat Bio HYDO™ Advanced biodegradable hydraulic oil
- High ambient hydraulic oil
- ROTOR SYSTEM
- Powered rotor turning device (with pendant control)
- System K Rotor - Coarse (18 mm)
- System K Rotor - Standard (15 mm)
- System K Rotor - Fine (8 mm)
- Cat Diamond bits
- Pneumatic bit removal tool
- Tool holder extractor
- 510 kg (1124 lb) ballast kit
- SERVICE AND MAINTENANCE
- Air compressor
- Accessory drive system
- High pressure washdown
- Low pressure washdown
- Additional water spray system (dust control)
- SAFETY AND SECURITY
- Halogen work lighting
- Wide dispersion LED work lighting
- Warning beacon (fixed)
- LED roading lights
- Truck signal lights
- Remote cameras (rear back up, front conveyor, left and/or right cutting edges, magnetic mount)
Related Products
Units:
Equipment Management
Cat® Equipment Management gives you access to the data you need to keep your equipment on the job site and earning money. You can track equipment location and hours, monitor machine use and health, then take informed action that will keep your operation running smoothly, efficiently and profitably.
Grade
Cat® Grade technologies combine digital design data, in-cab guidance, and automatic controls to enhance grading accuracy, reduce rework, and lower costs related to production earthmoving and rough, fine and finish grade applications.
Whether you're working on simple planes and slopes or complex contour designs, Grade technologies enable you to boost grading efficiency by as much as 50%, helping you get more work done – in less time and at a lower cost – than ever before.
Rotors
Cat rotors for milling and reclamation allow you to customize your cold planers and road reclaimers for urban, utility and high-production projects. Choose from a variety of styles and spacings to match your application needs.
| Model | Milling Width | ||
|---|---|---|---|
| System K 1.2 m Milling Drum (18 mm spacing) | — | — | — |
| System K 1.2 m Milling Drum (15 mm spacing) | — | — | — |
| System K 1.2 m Milling Drum (8 mm spacing) | — | — | — |