Entwicklung einer modularen Spaltverstellung für Walzenbrecher

Translated title of the contribution: Development of a modular gap adjustment for roller crushers

Alexander Widmoser

Research output: ThesisMaster's Thesis


In the following master thesis, new concepts for the design of roller crusher were developed. At the beginning, a market analysis as well as literature research was carried out, to implement the concepts of other manufacturers and to create a theoretical basis for the design of the roller crusher. In addition, patent research for further development was commissioned to avoid possible patent infringements and to get further inspiration for the design. To validate the theoretical approach, crushing tests were performed at the Oberweis site with a laboratory-sized roller crusher. The crushing force was recorded by a ring load cell. As feed material a soft rock (lime) and a hard rock (granite) were selected. Crushing tests were carried out with a roller crusher to validate the extrapolation of the crushing forces to a larger crusher, at the MFL company site in Liezen. Due to complications during the experiments at the Liezen site, reverse engineering was applied to the existing plants to determine the maximum forces in the gap adjustments. During the workshops, the entire structure of the roller crusher was reconsidered and new ideas were discussed. As a result, a new concept for the roller segments as well as a new drive system, which will replace the traction gear, was presented. For the gap adjustment itself, the focus was on a simple design and modularity. The newly developed gap adjustment was then designed based on the crushing tests and taking reverse engineering into account. The developed roller crusher can be converted from a manual to an automatic gap adjustment with little effort. In addition, the mass of the entire construction was significantly reduced.
Translated title of the contributionDevelopment of a modular gap adjustment for roller crushers
Original languageGerman
Awarding Institution
  • Montanuniversität
  • Prenner, Michael, Co-Supervisor (internal)
  • Sifferlinger, Nikolaus August, Co-Supervisor (internal)
  • Krapf, Michael, Co-Supervisor (external), External person
  • Egger, Matthias, Supervisor (external), External person
Award date16 Dec 2022
Publication statusPublished - 2022

Bibliographical note

embargoed until 11-11-2027


  • Roller crusher
  • Mineral processing
  • Crushing
  • Crushing equipment
  • Fracture behaviour
  • Gap monitoring
  • Adjustment system

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