Roads & Bridges
Focus on Pavement Milling
Aggregates & Roadbuilding reviews manufacturers’ latest offerings for pavement milling
Dynapac has introduced the PL500T and PL500TD, a new generation of 500
mm (20”) compact cold planers. Available as three- or four-wheeled
units, the PL500T and PL500TD offer increased power, excellent
manoeuvrability and improved operator efficiency to meet the demands of
Dynapac has introduced the PL500T and PL500TD, a new generation of 500 mm (20”) compact cold planers. Available as three- or four-wheeled units, the PL500T and PL500TD offer increased power, excellent manoeuvrability and improved operator efficiency to meet the demands of milling contractors.
Increased engine power ensures improved performance and a maximum cutting depth of 160 mm for the PL500T and 200 mm for the PL500TD. Each model is powered by a step-3 compliant Cummins QSB 4.5 C110/C130 diesel engine. Engine ratings of 110 hp/82 kW/112 PS at 2200 rpm for the PL500T, and 130 hp/97 kW/132 PS for the PL500TD offer an increased output compared to similar sized competitive models.
Options for the PL500T and PL500TD include a 1 m conveyor for loading a wheel loader bucket or a 5.5 m long conveyor for loading trucks. Additional options include a weather-proof canopy, hydraulically foldable right rear wheel and the Dynapac electronic levelling system.
Roadtec introduced the RX-400 cold planer three years ago, and since then the machine has undergone a number of important refinements.
The machine had been introduced to fill contractors’ needs for a flexible cold planer with a cutter housing that won’t clog up with narrow cuts. The standard cutting width of the RX-400 is 1.2 m. An optional variable cutting system including 660 mm and 90 mm is available, as is a 1.52 m cutting width package. Maximum cut depth is 320 mm. The unique RX-400 cutter housing design provides efficient material evacuation even with deep cuts in clog-prone, loose material. Efficient material evacuation prevents undue wear on cutting teeth and holders and improves productivity.
Several areas of the machine have undergone changes for ease of service and inspection. For example the rear anti spin valve and rear track drive bulkheads are much more accessible and bulk head fittings are being used now for track drive and endgate hoses to make hose changes easier. Additionally the hydraulic system has undergone modifications to prevent excessive leakage at low speed under load. The RX-400 cold planer features a 325 hp (242 kW) Caterpillar C9 ACERT engine, and a maximum operating speed of 52 m/min.
Wirtgen America Inc. has introduced the W 200 and W 210, two new large asphalt cold milling machines.
The W 200 is a large but compact milling machine that can be equipped with milling drum assemblies of 1.5 m, 2.0 m, or 2.2 m working width. Three selectable engine speeds enable a broad range of applications, such as large-scale surface course rehabilitation, complete pavement removal at full depth, fine milling, and many others. It has a milling depth of zero to 330 mm and is powered by a single engine generating 550 hp. Its operating weight is 27.2 tonnes CE, CE being with half-full water tank, half-full fuel tank, a 75 kg driver, and tools.
Like the W 200, the W 210 is a large but compact milling machine, which can be equipped with milling drum assemblies of 1.5 m,
2.0 m, or 2.2 m working width. But unlike the W 200, the W 210 boasts a unique fuel-saving drive concept utilizing two diesel engines, generating a total 671 hp with both engines engaged. Like the W 200, it features three
selectable engine speeds enable a broad range of applications. Its operating weight is 28.2 tonnes CE.
Caterpillar Inc. has announced the availability of the PM200 Cold Planer with an optional 2.2 m (88") cutting rotor. Customers now have two cutting width options when purchasing the PM200: the standard 2.0 m (79") rotor or the new 2.2 m (88") rotor option. The new 2.2 m rotor option provides greater efficiency and productivity by reducing passes during applications that benefit from a wider cutting rotor, such as mainline, high productivity milling. Fewer passes will contribute to a reduction in fuel burn. The standard 2.0 m rotor provides greater versatility for urban applications and milling tasks that require a high degree of manoeuvrability and precision.
The PM200 is a high-production, highly manoeuvrable half-lane milling machine that performs controlled full-depth removal of asphalt and concrete pavements in a single pass. Operating weight for the PM200 is approximately 30,100 kg with the standard 2.0 m rotor package; the weight increases to 31, 500 kg with the optional 2.2 m rotor package.
Both the 2.0 m and the optional 2.2 m wide rotors feature conical tool holders and have a maximum cutting depth of 320 mm. The 2.0 m conical tool holder rotor is equipped with 178 carbide-tipped tools, and the optional 2.2 m conical tool holder rotor is equipped with 193 carbide-tipped tools. Both rotor options position the tools in durable three-piece, quick release tool holders arranged in a chevron pattern for maximum breakout force. The quick release conical tool holders feature a tapered fit, maintaining tightness in the holder base. The mandrel features large, replaceable, carbide-faced loading paddles to effectively move milled material onto the collecting conveyor, resulting in higher production and less wear on the inside of the rotor chamber and cutting tools. Triple-tree tool placement on rotor end cutters provides optimum tool spacing to clean up loose material and reduces wear on the rotor when manoeuvring in the cut.
An optional dust-reduction package is available for PM200 machines equipped with the 2.2 m (88") rotor option. The attachment will more efficiently control dust during operation and includes an additional water pump as well as additional spray bars located inside the rotor housing and conveyors.