Innovations in cold milling machines

Wirtgen considers that their two new large asphalt cold milling machines, the W 200 and W 210, will prove to be the most exciting half-lane machines in a generation.

The new W 200 is a large but compact milling machine that can be equipped with milling drum assemblies of 59, 79 or 87 inches (1.5, 2.0 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 13 inches and is powered by a single engine generating 550 hp. Its operating weight is 59,934 pounds with half-full water tank, half-full fuel tank, a 165-pound driver and tools.

Like the W 200, the new W 210 is a large but compact milling machine, which can be equipped with milling drum assemblies of 59 inches (1.5 m), 79 inches (2.0 m), or 87 inches (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 enabling a broad range of applications. Its operating weight is 62,138 pounds.

The W 200 and W 210 incorporate a number of innovative new technologies for cold mills that are exclusive to Wirtgen Group, the company reports.

Their Parallel-to-Surface (PTS) technology automatically keeps the cutter housing level as the W 200 and W 210 move into a cut, accelerating production, and their “smart” WIDRIVE technology offers new microprocessor-controlled enhancements to machine control systems, tying all main functions to a single source to manage fuel costs, tooth costs and other variables.

Their Intelligent Speed Control system incorporates an electronic flow divider that makes the four tracks work in harmony when turning a radius. Skipping and notching are eliminated, track wear is minimized, and the machine operates more smoothly. The Level Pro – Wirtgen’s existing automatic levelling system which is highly user-friendly – regulates the pre-set milling depth and actual readout electronically.

Asphalt and concrete milling is one of the most abrasive environments for any machine but Wirtgen’s new Vacuum Cutting System will remove dust, fines and smoke from the cutter chamber and extract it out the conveyor, keeping the machine cleaner and prolonging component life. And the new 3DS Flexible Application Drum Speed system will automatically slow drum speeds in deep cuts, saving on fuel consumption and tooth wear.