Hammer mill for smaller throughputs

Wide chamber mill W

Weitkammermühle W

Wide chamber mill W

Hammer mill for smaller throughputs

Drive power
75 – 250 kW
Grinding chamber area
0.6 – 1.8 m2
Permissible weight
1550 – 2550 kg
Grinding chamber diameter
680 mm
Sieve width
400 – 1250 mm

Technical details
  • Robust welded steel construction, symmetrical housing for operation in both directions of rotation.
  • Grinding chamber equipped with wear elements to protect the housing walls, easy to replace
  • Armored inlet flap with position switch for change of direction of rotation
  • Optimized impact zone with armored impact plates on both sides of the inlet for efficient size reduction
  • Debris trap for contaminants inside the grinding chamber as screen protection
  • Durable, optimized rotor design, dynamically balanced, equipped with 6 mm beaters
  • Beaters easy and quick to turn and change with special changing device
  • Wide opening doors, easy access to the grinding chamber and for changing the sieves and beaters
  • 2-part sieve without frame, easy and quick to change segment by segment
  • Tested and certified in pressure shock resistant and flameproof design (0.4 bar)
  • Variable grain spectrum via variable beater circumferential speed (when using a frequency converter),
  • Sieve perforation and beater configuration; depending on requirements.
Machine types
W 400 C W 700 C W 1000 C W 1200 C
Grinding chamber diameter 680 mm 680 mm 680 mm 680 mm
Sieve width 400 mm 760 mm 1000 mm 1250 mm
Grinding chamber area 0.6 m² 1.1 m² 1.5 m² 1.8 m²
Dimensions and weights
Length* (approx.) 2250 mm 2710 mm 2950 mm 3150 mm
Width (approx.) 1665 mm 1665 mm 1665 mm 1665 mm
Height (approx.) 1150 mm 1150 mm 1150 mm 1150 mm
Weight without motor 1550 kg 1700 kg 1950 kg 2250 kg
Drives 3000 1/min, 50 Hz - Speeds between 1200 and 3600 1/min (20-60 Hz)
Power range 75 kW 110 - 132 kW 160 - 200 kW 200 - 250 kW

* Depending on motor size Measuring surface sound pressure level < 90 dB (A) (under load)

Download data sheet

Specialist for fibre digestion

Optimal product discharge of moist ground material


The Hammer Mill series W is specially designed for grinding moist and wet wood with more distance between the side wall and screen. This mill grinds chopped soft and hard wood with a feed size up to standard G50 wood chips, and a water content up to 60%, in one step to a fineness required for wood pellets. The W series consists of four sizes with a drive-power range between 75 and 250 kW.

The use of waste wood as a substitute fuel in coal-fired power plants is gaining enormous importance in the energy transition. The Wide chamber mill W plays an important role in this context. You can find out more in our article Waste wood as a substitute fuel and alternative to coal.

Our projects with the product
Wood pellets as climate-neutral fuel
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