Hammer Mills 650

The Ottevanger Hammer Mills 650 series are eminently suitable for grinding granulates up to 20 mm diameter. Depending on the screen size used,the Hammer Mill 650-Series are able to reduce the particle size down to approx. 200 micron. The Hammermill type 650-375 has one direction of rotations, type 650-550 has a two-way direction option. The Hammermills can be delivered with certified Atex 22 components.

The machine features a solid all-welded construction and has a number of benefits, which are mentioned below:


  • The base plate is mounted on anti-vibration units; Which brings a positive result of no vibrations transmitted through the building
  • Large doors/hatches makes it easy and convenient to replace worn parts
  • Precisely balanced rotor with specially sealed bearing housings with dust protection
  • The screen covers nearly three-quarters of the grinding circumference
  • Quick and easy screen replacement without stopping the production process of the Hammer Mill 650
  • Type 650-375 is only available in single rotation execution
  • Type 650-550 is executed in dual direction of rotation
  • Fully enclosed vibrator feeder with permanent magnet, equipped with a roll feeder with automatic self-cleaning magnet – and stone trap

Special execution

  • Automatic feeder (optionally frequency controlled)
  • ATEX 22 certified components

Feeding System

For optimum efficiency in grinding it is essential for the feed to be even and for the ground product to be discharged as fast as possible from the grinding chamber. The mechanically driven feeder ensures an even feed over the whole width of the mill and the automatic load control controls the feed in proportion tot he load on the main motor. The drum type will provide a full load in 10 seconds from start up. It includes a permanent magnet and stone trap, and an auto magnet cleaning device.

Range of Hammer Mills 650

Type HM650-375 HM650-550
Motor(KW) 30-55 55-90
Screen(m²) 0,55 2 x 0,4
Chamber Diameter(mm) 650 650
Length(mm) 375 550
Capacity Maize 4-7 7-12
Barley 2-4 3-7
Transport Volume(m³) 4 5
Weight(kg) 900 1100

* Weight excl. motor

Doorsnede hm