Roller Teeth (Rollenzahn) for Heavy-Duty Mining Machinery

At UNIMA, we manufacture roller teeth assemblies strictly in accordance with customer-supplied technical drawings. These components are essential wear parts in mining and bulk material handling machinery, where they engage directly with abrasive rock, ore, and overburden.
Where and How They Are Used:
  
Bucket Wheel Excavators – teeth mounted on rotating buckets for continuous excavation in open-pit mining.
  
Rotary Breakers – roller-mounted teeth for breaking down raw coal and other friable ores.
  
Heavy-Duty Roll Crushers & Sizers – crushing elements that reduce large rock and ore lumps into manageable sizes.
  
Scraper and Conveyor Systems – impact and guiding elements for bulk material transport.
Working Principle:
The roller teeth are mounted on cylindrical or wheel-shaped bodies that rotate against the material flow. The tooth profile penetrates, fractures, or shears the material while the rotation ensures continuous throughput.
Production Features:
  
Manufactured from wear-resistant alloy steels or with hardfacing overlays
  
Welded, bolted, or keyed mounting configurations per drawing
  
Machining and assembly of large-diameter roller bodies
  
Optional tooth profile customization according to material abrasiveness
  
Full dimensional inspection and quality documentation included