Four Bearing Screens

CMB four-bearing screens feature rugged construction and a positive circular vibrating motion. They are ideal as scalpers for large aggregates, or as screens for difficult, sticky materials. These screens can be offered as a direct replacement for Niagara screens.


  1. Alloy steel counterweighted eccentric shaft, precision machined to fine tolerances.
  2. Grease lubricated, spherical bearings are protected by a combination of labyrinth and vee-ring seals.
  3. Screen sub-frame is supported on anti-vibration rubber mounts to minimise the load transmitted to the supporting structure.
  4. Precision laser-cut side plates.
  5. Screen trays can be furnished to support any type of screening media.
  6. Heavy duty adjustable coil springs support the live frame.
  7. Spray bars can be supplied as required.


  1. A direct replacement for Niagara screens.
  2. Ideal as scalpers for large aggregates.
  3. Ideal in handling difficult, sticky materials.