Willibald Flex Star 3000

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Once the original materials have been shredded and (depending on the material) turned over several times, everything has to be screened. That’s because only perfect separation of the different-sized components delivers a perfect result. From compost and bark mulch to wood chips to nutrient-rich soil – the finest possible screening WILLIBALD-style guarantees maximum size consistency with every material.

Powerful screening of 3 fractions in a single operation

The new Flex-Star 3000 star-type screen was designed for the purpose of screening biomass, compost,   pre-crushed old wood, bark mulch and wood chips into three fractions in just one operation, and then discharging it separately.   The Flex-Star 3000 really comes into its own when conventional screening technology reaches its limits. Damp and sticky bulk materials that tend to quickly stick to screen bases are screened out efficiently and economically. A material discharge belt height of around 3.80 m allows a large storage capacity under the screen, and consequently optimized wheel loader operation also.

The Flex-Star 3000 is assembled on a chassis with an 80 km/h road license, a standard pneumatic system and ABS, and is driven by a powerful 75 KW (102 HP) 4-cylinder Perkins Diesel engine. This produces its maximum torque at 1,600 rpm and complies with the current emissions regulations. At the same time, the low consumption values and a large 150l Diesel tank guarantee long periods of uninterrupted operation.

The compact size of just 10.30 m provides the required mobility and optimum operation even where space is at a premium. The large infeed hopper guarantees even loading and thereby high throughout of up to 160 cbm per hour combined with exact material separation.   The core of the screening system is the screen decks developed by J. Willibald GmbH with finger metal bars on flexible shafts. The modular design allows the screen to be used as a 2-fraction screen or a 3-fraction screen. The changeover is hydraulic and is performed easily and quickly via the remote control.   Efficient screening of 3 fractions in a single operation for precise biomass, compost and wood chip processing

  • Steplessly adjustable Diesel hydraulic drive
  • Large-volume hopper (approximately 6m)
  • Fine-grain, medium-grain and coarse-grain stages can be set via the speed of the star shafts
  • Space-saving and economical screening inlays
  • Modular replacement possible of screen deck for fine stage and coarse stage

Areas of use:

  • Biomass, compost, wood shavings, wood chips, bark mulch

target groups: 

  • compost plants; humus plants; Bio mass power plants


  • Flexible use (can be used in a variety of materials)
  • Works well even with damp material
  • compact construction: Can be used even in restricted spaces thanks to short design
  • Quick & easy changeover from the transport position to the working position
  • diesel hydraulic drive actual (100 HP Perkins engine)
  • Chassis with 80 km/h road license – ABS standard
  • big material infeed hopper
  • Large material infeed hopper – material fed in by means of endless floor with high carriers– speed continuously adjustable by potentiometer
  • Stepless adjustment of the individual screen decks (speed of the star shafts) – the grain size and quality can be determined by this
  • Both screen decks can be easily changed (approx. 2h per screen deck)
  • The metal finger metal bars are individually changeable
  • Easy to maintain thanks to components that can be moved away
  • All components can be operated by radio control (optional)
  • Easy operation > Automatic Start – Stop
  • Machine can be moved at crawling speed
  • Greater dropping distance possible thanks to longer conveyors
  • Modular design (can be optionally used as a 3-fraction or 2-fraction screening system)


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