Wirtgen is offering an array of new technologies for milling, recycling and stabilising applications. These are intended to boost accuracy, versatility and performance
A new milling drum assembly is offered that widens the range of applications that the Wirtgen W 150 CF/W 150 Cfi milling machines can handle. This redesigned assembly allows users to select an array of cutter drums, including a 1.8m-wide unit. According to the firm, the machines offer the highest power to weight ratio for their class, with diesels delivering 298kW, allowing effective use of the 1.8m-wide drum.
Because the machines can handle a wide range of working widths, they can be used for small milling machine applications such as partial road surface repairs or the removal of entire road pavements. The units are well-suited to carrying out large-scale projects in confined spaces such as on urban job sites, aided by good all-round visibility and an onboard camera system to allow accurate manoeuvring in tight spaces.
The drums feature a novel flexible cutter system that allow customers to switch between 600mm, 900mm, 1.2m and 1.5m milling drums quickly and simply. In addition, users can select milling drums with different tool spacings to best suit the type of material and application.
The new extension kit extends the milling drum housing by 300mm, which allows the machines to offer a working width of up to 1.8m, making them even more versatile and for surface course rehabilitation on medium to large job sites.
In addition to revised milling and cutting technology, the models are said to feature efficient loading conveyors. The design increases efficiency for direct loading of milled material onto trucks due to a high loading capacity. A larger cleat profile on the discharge conveyor of the W 150 CF/W 150 CFi helps to optimise material transport while higher conveyor speeds also assist in delivering precise and productive loading. Another advantage is the large conveyor slewing angle of 60° to left and the right, which allows milled material to be loaded under difficult site conditions such as roundabouts.
To boost utilisation, the W 150 CF/W 150 Cfi variants offer optimised machine transport weight, making them easier to move from site to site. To speed set-up times, the variants are fitted with hydraulically-operated folding conveyors. These can be folded or unfolded quickly, further boosting utilisation.
For recycling and stabilisation applications meanwhile, the firm has developed its DURAFORCE milling and mixing rotor. This design allows the Wirtgen WR recycler/stabiliser models to be used in an array of tough applications.
The DURAFORCE rotor helps to reduce tool changing times, maximising uptime. The rotor components have been optimised to ensure the separate items perform more efficiently as a unit when fixed together.
According to Wirtgen, the relationship between the rotor, holder base, quick-change toolholder system and point-attack tool is crucial for maximising milling and mixing capacity over the long term. The use of high-grade materials and the precise geometry of the components ensures that the milling and mixing rotor offers a longer service life even in tough applications, such as stabilising soil containing larger stones, stabilising abrasive materials or granulating.
The tool spacing and arrangement of the cutting tools on the milling and mixing rotor are tailored to the individual machine capacity, so that high-quality mixes can be produced with smooth, quiet milling and mixing processes. The novel geometry of the holder base and the large diameter of the DURAFORCE rotor allow a mixing chamber with a variable size according to the milling depth, while ensuring that materials are mixed homogeneously.
The cutting system components are configured for long life and low maintenance requirements. The point-attack tools of generation Z have high wear and impact resistance, while the HT22 quick-change toolholder system is said to be long-lasting and helps reduce set-up times, for greater utilisation.
High-grade tool alloys are said to maximise holder strength, while good access to the hard-wearing components help to reduce changeover times.
The high resistance to wear as well as the durability of the holder base combine with a streamlined geometry to deliver greater wear life and a minimum resistance for milling and mixing processes. The optimised material flow ensures that the engine output is used efficiently while keeping wear to a minimum.
