Wirtgen W 220: Big Power in Lighter-Weight Cold Mill
The new W 220 cold milling machine from Wirtgen America Inc. rounds out the lineup of high-performance large cold mills from Wirtgen Group, providing the capabilities of Wirtgen’s largest machine in a lighter-weight machine that can be readily transported.
The W 220 provides the milling width and depth of the heavier W 250i – Wirtgen’s biggest and most powerful mill – but with a lower weight that enables it to more easily meet legal weight load limits. The W 220 -- like the W 250i – will mill up to 14 in. deep, at a nominal milling width of 87 in. Its power plant provides 766 hp, with an operating weight of 80,160 lb. The W 220 can produce up to 900 tons per hour of reclaimed asphalt pavement (RAP).
The Wirtgen W 220 can remove asphalt layers over a foot deep – and tough portland cement concrete pavements as well – at a high advance rate. Three different milling drum speeds can be adjusted from the operator’s platform: high speed for large-scale milling of thin lifts, medium for standard surface courses, and low speed for optimized fuel consumption and low cutting tool wear.
While the W 220 comes with a standard 87 in. (2,200 mm) milling drum width, via the optional FCS Light system, a 98-in. drum can be fitted. FCS Light also permits easy exchange of drums with standard tool spacing with those of wider or tighter tool spacings. The standard milling width of the W 220 can be extended with additional milling drum units for working widths of 8.2 ft. (2.50 m), 10.2 ft. (3.10 m), 11.5 ft. (3.50 m), 12.5 ft. (3.80 m), up to a maximum 14.4 ft. (4.40 m).
In addition to removing complete pavement sections in a single pass, the W 220 permits individual layers to be removed very economically. The intelligent WIDRIVE machine management system and the three selectable milling drum speeds keep operating costs very low for a cold milling machine in this performance class.
The W 220 operating platform provides the operator with an optimal work environment, which speeds productivity and provides an abundance of operating information. Part of this intuitive operating environment – a multifunctional control display – operates as a practical information hub. It can be swung to the left or right of the operator – together with the Level Pro control panel – and displays operating status and servicing data in an easily comprehensible way.
The control display provides user-friendly diagnostic options with clear graphics for identifying the source of any problem. Another handy function is the logging of job data: at the end of the day, the log can show how many trucks have been loaded and the overall tonnage achieved.
The new W 220’s Parallel-to-Surface (PTS) system automatically aligns the cold mill parallel to the road surface. The system ensures simple, accurate operation of the machine in demanding profiling jobs. PTS also assists the operator with positioning the machine in the milled cut to initiate the milling process. In automatic mode, the system takes care of all the steps that the operator would otherwise need to select manually one after another; the need for repetitious manual correction is eliminated.
The operator activates the integral Level Pro control system at the flick of a switch, and all four crawler track units of the large milling machine are lowered simultaneously at high speed. When the milling drum unit reaches the surface to be milled, the lowering speed is reduced and the milling drum slowly penetrates the material down to the set depth. The automatic process helps to prevent excessive cutting tool wear or even tool failure when commencing the milling operation.
The same applies when the W 220 is aligned transverse to the direction of travel. In many cases, cold milling machines need to overcome significant differences in height when being moved into or out of the milled cut. The integrated four-fold, full-floating axle balances out all four track units quickly and reliably to reduce the machine’s lateral inclination to a minimum. This lends a high degree of stability to the large milling machine.
The W 220’s Intelligent Speed Control (ISC) system ensures maximum traction. The ISC system is particularly useful for highly demanding milling jobs. Just like the traction control system of a car, ISC prevents crawler track slip and ensures perfect traction of all track units to achieve maximum milling performance, reducing track pad wear.
When negotiating turns, the ISC system automatically increases the speed of the outer crawler tracks, depending on the steering angle. As a result, even extremely tight turns can be milled using the all-track drive. Automatic adjustment of the advance rate to match the diesel engine load always ensures maximum performance yet quiet operation of the machine.
An optional 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.
For further information, please contact:
Wirtgen America, Inc.
6030 Dana Way
Antioch, TN 37013
WIRTGEN AMERICA Inc., Nashville, is the North American headquarters of the WIRTGEN GROUP, the single-source marketer of the world's most technologically advanced lines of asphalt reclaiming/recycling, concrete slipform, and surface mining equipment from WIRTGEN, asphalt and soil compactors from HAMM, asphalt pavers from VÖGELE, and construction materials processing equipment from KLEEMANN.
Reinhard Wirtgen, founder of WIRTGEN GROUP, was honored as one of the "Top 100 Private Sector Transportation Design & Construction Professionals of the 20th Century" by the American Road & Transportation Builders Association (ARTBA).