Cold milling machine W 50 - Wirtgen GmbH

Efficient small milling machine for standard applicationsCold milling machine W 50

The economically efficient alternativefor countless small milling jobsEfficiency is the W 50’s hallmarkThe W 50 is the perfect intermediate-size machinebetween the tried-and-tested small milling machinemodels W 35 DC and W 50 DC, and fully meets the requirementsof standard users. Whether milling on small to mediumsizedroads, carrying out small repairs or milling tie-ins,milling around manhole covers or removing asphalt strips:The W 50 performs all the jobs that are typical of a smallmilling machine with tremendous economic efficiency. Easeof operation, low fuel consumption and the machine’s soliddesign do their bit to guarantee surprisingly low operatingcosts. It goes without saying that many different customerexpectations are also taken into account, for the W 50’sequipment concept offers a tremendous variety of individualoptions.

The W 50 is distinctive for itstried-and-tested equipment featuresand extremely easy handlingCompact,dependable andeconomicallyefficientIn accordance with thecustomer’s specification:machine without loadingconveyorThe W 50’s intuitive control interface and ergonomicallyoptimized operator’s platform considerably increasecomfort for the machine operator.Additional options, such as different conveyor choices,canopy, three-wheel or four-wheel design, or FCSextend the range of applications and ease of operation.Highly precise milling results of top quality can beachieved with the optional LEVEL PRO levelling system,which has been specially developed for use in millingmachines.The W 50’s compact design guarantees ease oftransport, exceptional manoeuvrability, and goodoverall view.2// 3

Large surfaces are no problemfor small machinesA class of its own in practical operationThe W 50 impresses not only when swiftly removingsurface courses at depths of up to 4 cm. It cuts a finefigure also when milling off several layers or even entireasphalt packages at depths of up to 16 cm. The performancediagram is proof that the small milling machine iscapable of achieving high daily production rates.The schematic diagram on the opposite page can be usedfor a rough calculation of the practical milling performanceto be expected. An allowance factor takes account of influencingfactors that may reduce the performance, such ashindrances to the work resulting from traffic, waiting timesfor trucks, non-contiguous milling areas or road fixtures.

Milling depth (cm)161412Hard asphaltSoft asphalt108Most frequent operating area64200 50 100 150 200 250 300 350 400 450 500Theoretical areaperformance(m 2 /h)Economically efficientmilling of surfacesFree motorway section(allowance factor: 0.7)0 50 100 150 200 250 300 350Practical areaperformance(m 2 /h)Country road with road fixtures(allowance factor: 0.5)0 50 100 150 200 250Practical areaperformance(m 2 /h)An allowance factor of 0.3 isused where space is limitedHeavily trafficked inner-city road(allowance factor: 0.3)0 50 100 150Practical areaperformance(m 2 /h)Calculation of the area performance,taking account of different job siteconditionsThe modern engine and direct mechanical milling drumdrive guarantee full performance up to a milling depthof 160 mm.The machine's powerful, flexible conveyor system canbe depended on to preclude performance losses duringloading of the milled material.The allowance factor is between 0.7 for free sectionsof road and 0.3 for heavy urban traffic.4// 5

Mature engineering guarantees highdaily production ratesReliable high-tech works the groundWirtgen has been the leader in cutting technology formany years, guaranteeing high-quality milling results.An optimized arrangement of the toolholders on the millingdrum and clever tooling of the drum edges ensure a cleanmilling texture and quiet operation of the machine. Themilling drum is fitted with welded toolholders and worksagainst the direction of travel in an effectively sealed millingchamber. Clean loading of the milled material is ensuredby the hydraulically height-adjustable scraper blade:Depending on its position, all or just part of the milledmaterial is loaded on trucks, while the remainder is left inthe milled cut.

Cutting tools per cubic metre2,52,01,51,00,5Perfect millingresults0,025 50 75 100 125 150 175Milling depth in mmCutting tools per m 3 at high wear and tear Cutting tools per m 3 at low wear and tearCutting tools per m 3 at medium wear and tearCutting tool wear as a function of the milling depth and the properties of thepavement to be milledThe scraper blade islocked when in raisedposition to allow convenientreplacement of cutting toolsLow cutting tool wearcuts operating costsWhen in floating position,the scraper blade permits fullloading of the milled materialThe scraper blade can be opened hydraulically toprovide the machine operator with ample room forthe replacement of cutting tools.To ensure the safety of the machine operator, the millingdrum is switched off automatically when opening thescraper blade.Cutting tools are replaced quickly and easily usingstandard tools.The rotating point-attack tools from Wirtgen aresynonymous with tried-and-tested, highly durablecutting-edge technology.6// 7

Making child’s play of workon the job siteFCS fine milling drumMilling width:Milling depth:Tool spacing:500 mm0 – 50 mm6 mmFCS micro fine milling drumMilling width: 300 + 2 x 25 mmMilling depth:0 – 30 mmTool spacing:3 mmFCS micro fine milling drumMilling width:500 mmMilling depth:0 – 30 mmTool spacing:3 mmFCS makes the W 50 an all-rounder on the job siteThe small milling machine W 50 is fully equippedfor meeting the daily challenges on the job site.A mechanically driven milling drum guarantees maximumefficiency and top performance. The power belts of themilling drum drive ensure optimum transmission of power,while successfully absorbing peak loads. The optional FCSoffers an even larger range of applications – the patentedquick-change system for milling drums turns the W 50 intoan all-rounder, guaranteeing full utilization of the small millingmachine at all times. The system enables the W 50 to befitted with milling drums of different working widths and toolspacings easily and in an extremely short period of time.

Changing themilling drum in afew swift movesRaise the side plates whentravelling over obstacles, orpress down on the ground asand when requiredThe milling drum is easily pulledoff the shaft after unscrewingThe hydraulically pressurizedside plates reliably sealoff the drum housingThe machine’s electrically operated water spraysystem reduces cutting tool wear and tear, as well asthe development of dust during the milling operation.The side plates on both sides of the milling drum canbe raised, preventing them from digging into unpavedshoulders.The nozzles of the water spray system can beremoved and cleaned in no time at all.Special milling drums for different applications areavailable upon request.8// 9

Fast and flexible loading of materialThe loading conveyor canbe adjusted in height …… and slewed by 25° to the leftand 20° to the right, permittingloading to be effected to the sideEconomically efficient material loading is most importantReliable loading of the milled material is of crucialimportance when it comes to ensuring the smoothcompletion of a milling site. That’s where our W 50 makesa strong showing. Customers can choose from as many asfour different loading conveyor options. Whether the milledmaterial is loaded on trucks or into the bucket of a wheelloader, deposited as a windrow next to the machine, or leftin the milled cut – efficient removal is guaranteed at alltimes. The conveyor belts are fitted with robust, sturdy cleatsto ensure powerful transport of the milled material. All conveyorsare adjustable in height and can be slewed to eitherside. The conveyor belt speed is continuously adjustable toenable even large trucks to be filled right to the top.

The W 50’s optional foldingconveyor facilitates transportAlways on thesafe side with fourloading optionsThe short conveyor permitsloading into the bucket of a wheelloader or onto a mini dumperThe W 50 leaves the milledmaterial in the cut when workingwithout loading conveyorThe W 50 is available with the following conveyoroptions: without conveyor, with one-stage short conveyor,one-stage long conveyor, or long folding conveyor.A special coupling device enables the loading conveyorto be attached or removed in a few swift moves by oneperson only.The optionally available folding conveyor shortens thetransport length by approx. 2 m, enabling the smallmilling machine to be transported on smaller trailers.The conveyor’s hydraulic power take-off can optionallybe used for ancillary equipment like, for instance,a hydraulic hammer.10 // 11

Effective milling when space is limitedThe W 50 can turn nearly on thespot when the front wheel issteered to maximum lockFour instead of three wheelsfor even better tractionA steering angle indicator on theengine cowling shows the position ofthe front wheel (3-wheeled model only)Unmatched in terms of manoeuvrabilityA compact, manoeuvrable cold milling machine onthree (optionally four) individually driven wheels – that’sthe W 50 from Wirtgen. The machine’s superior manoeuvrabilityin space-restricted conditions enables many jobs ona milling site to be completed with much more ease andspeed. An extremely large locking angle of the front axle ispart and parcel of the entirely coherent machine concept,enabling extremely tight milling radii when milling aroundmanhole covers or gas valves. The rear right support wheelcan additionally be folded in or out quickly to improve themachine’s side clearance. This practical feature permitshighly precise milling along obstacles like, for instance, wallsor traffic islands.

Permanent all-wheel drive withengageable differential lock is astandard featureManoeuvrabilityoffers significant timeadvantagesThe support wheel is folded inquickly in a few swift movesThe W 50 is capable of milling flushto kerb with the support wheelfolded in front of the drumThe W 50’s hydraulic, finger-light steering supports themachine operator when working in narrow sections.The travel speed can be infinitely varied from zero tomaximum speed in both milling gears and in travel gear.A hydraulic flow divider acts as differential lock,guaranteeing permanent and uniform traction all thetime regardless of ground conditions.The machine’s large ground clearance protects thelower part of the chassis from being damaged by, forinstance, high kerbstones.12 // 13

Ergonomics and operator comfortRelaxed working for extended periods of timeErgonomics boost performance! For precisely thatreason, the development of the W 50 has produceda role model of user-friendliness and maximum customerbenefit. The control elements are arranged clearly, withineasy reach and within the operator’s immediate field ofvision. The optional driver’s seat, which can be movedbeyond the right edge of the machine, and comfortableworking in both standing and sitting positions ensure anexcellent view of the milling edge and the working environment.It goes without saying that the steering wheel can betilted to adapt to each operator’s personal preferences.Altogether, the intelligent workplace design prevents fatigueand ensures relaxed working for extended periods of time.

In line with practical requirements –the clearly structured main controlpanel is within easy reachFeelingcomfortablehelps to do afaster jobLockable covers protect thecontrol elements from damageSimple handling,single-handedlyThe tilting steering wheel andample legroom increase theoperator’s comfort when workingin standing positionThe machine operator has a full view of the milling edge,which guarantees maximum safety.A multi-functional display at the control panel keeps theoperator informed of all relevant operating states.The spring-mounted driver’s seat can be adjusted in thedirection of travel, in height and lengthwise, offering amaximum degree of individual comfort.The W 50’s main functions are easily operated via thecontrol elements integrated in the right-hand armrest.14 // 15

The Wirtgen levelling systemguarantees precise work resultsConvenient levellingwith LEVEL PROScales installed on bothsides indicate the milling depthwith pin-point accuracyConvenient and simple operation isa mark in favour of the LEVEL PROcontrol systemFull control of milling depth and slopeA unique feature in this machine class, the innovativeLEVEL PRO automatic levelling system (optional) enablesthe performance capacity of small milling machines tobe increased even further. Wire-rope and cross slope sensorsintegrated in the LEVEL PRO levelling system ensureprecise, automatic control of milling depth and slope. Theuser-friendly LEVEL PRO control panel is arranged on theoperator’s platform and within the machine driver’s immediatefield of vision. Its clearly structured, intuitive designmakes operation of the W 50 simple and significantlyincreases operator comfort. Target and actual values of themilling depths left and right are displayed on easy-to-readmilling depth indicators all the time. Target values are easilypre-programmed, saved and called up as required.

Power under the bonnet –yet low in fuel consumptionP (kW)M [Nm]Economicallyefficient travel drive6026050240402203020020180101600100011001200130014001500160017001800190020002100 2200 2300 24001402500 [1/min]Characteristic curve of engineoutput and torqueExhaust fumes are conductedaway from the operator’s platformin the front part of the machinePower is supplied by astate-of-the-art diesel engineThe major hallmarks of the tried-and-tested 4-cylinderdiesel engine are high power combined with economicaloperation.Thanks to low noise levels, the soundproofed enginecompartment protects both the machine operator andthe environment from noise pollution.The highly efficient milling drum drive in the W 50 paysfor itself through low fuel consumption.16 // 17

An ingenious maintenance conceptpays for itself dailyLittle effort is needed to keep the W 50 in top shapeThe W 50 impresses with a simple maintenance concept.The small amount of maintenance work has beenreduced to a small number of individual inspection points.Wide opening doors on both sides enable maintenance tobe carried out quickly and easily from the ground. Engine,service points and filters are all located within easy reach.Water or fuel are refilled just as quickly via the easily accessiblefilling ports. The surprisingly simple maintenanceconcept will ultimately give the machine user a lucrativelead, allowing rapid completion of the construction work.

Clearly arrangedmaintenance pointsFast maintenancewins preciousoperating timeThe W 50 offers sufficientspace for storage, includingthe storage compartmentunder the driver’s seatWide opening wing doorsprovide optimum access tothe engine compartmentAll maintenance points are within easy reach thanksto the wide opening engine cowling.The W 50 is equipped with a spacious, lockablestorage compartment for tool containers or tools.A comprehensive tool kit is part of the standardscope of delivery.18 // 19

Working under controlled conditionsday and nightMilling regardless ofthe time of dayFlexible spotlights are attached tothe machine in no time at allSafe and convenient access atthe rear side of the machineWhen switched on, themachine’s lighting systemilluminates the entire working areaEffective lighting system ensures safe operationAn excellent range of vision by day and night, as wellas controlled working even in difficult conditions – theW 50 is a role model when it comes to meeting these vitalcriteria. The advantages are obvious: In addition to ensuringthe safety of the machine driver and producing a clean workresult, undisturbed working at night also increases themachine’s overall utilization. Optimum illumination is ensuredby two headlights at the front, as well as several additionallamps that can be attached in any position on the machine.The safety package is completed by quickly accessibleemergency stop buttons, exterior mirrors, a clearly audiblereversing horn and illuminated control panel.

Loaded in no time at all andoff to the next job siteDriving the machine onto a trailer iseasy, posing no problem at allMachine transport theshort way aroundA large number of lashing lugsenable the machine to besecurely lashed onto the traileror loaded by craneThe W 50 reduces its sizefor transport purposesSafe and fast loading permits the cold milling machineto be transported to the next job location as quickly aspossible.The W 50 has the ideal size not only for low-loaders butalso for small, low-cost trailers.The optional canopy can be folded down convenientlyvia gas-filled springs to save space during transport.Wirtgen’s product portfolio offers made-to-measuretrailers for transport of the W 50.20 // 21

The dependable W 50in versatile operationA good view of the milling edgepermits precise milling flush to kerbMilling along road fixturesis no problem at allThe W 50 masters its range of applications with superior easeA normal working day for the W 50 can sometimes bequite multi-faceted: In the morning, a trailer transportsthe machine to the job site, where it is quickly unloaded.Work commences immediately, consisting of the many jobsthat are typical of a small milling machine: On this day, theW 50 will carry out work that the large milling machineworking on the same job is not capable of performing.The pavement around some manhole covers needs to bemilled off first, followed by pavement strips in difficult bends.At around lunchtime, the rear right wheel is folded in withoutfurther ado to mill off any remaining pavement strips flush tokerb. Just before the working day ends, the W 50 quicklymills two wedge-shaped tie-ins. That’s it for today! All thatremains to be done is load the machine because the nextjob site is waiting on the next day.

Milling tie-ins in acrossroad areaThe W 50 is masterof many tradesMilling larger surfaces isno problem at all for the W 50Milling around a manholecover is child’s play, indeedOn milling sites, the W 50 is an ideal companion of largemilling machines which are responsible for milling off thelarge surfaces.The compact small milling machine’s exceptionalmanoeuvrability makes it the ideal candidate in particularfor jobs in space-restricted conditions.A broad variety of special milling drums are available,including a slot cutting ring for cutting butt joints, or amilling drum for producing water gutters.Three different loading conveyor options broaden themachine’s spectrum of applications, while ensuringoptimum completion of jobs at the same time.22 // 23

Illustrations are non-binding and may include customized fittings. Subject to technical changes.Performance data depend on operational conditions. No. 03-10 EN-04/08 © by Wirtgen GmbH 2008. Printed in GermanyWirtgen GmbHReinhard-Wirtgen-Straße 2 · 53578 Windhagen · GermanyPhone: +49 (0) 26 45 / 131-0 · Fax: +49 (0) 26 45 / 131-242Internet: www.wirtgen.com · E-Mail: info@wirtgen.com