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EG5: Cylindrical and conical outer surfaces, plane surfaces and bores


  • Machining of external cylindrical and conical surfaces, external and internal plane surfaces as well as cylindrical and conical bores (a special type is required for machining conical surfaces).
  • Can be used on CNC or conventional lathes
  • Machining in a chuck
  • Attainable surface finish Rz < 1 micron (Ra = 0.2 micron)
  • Processing of all metallic materials with a tensile strength of up to 1400 N/mm2 and a maximum hardness of HRC = 45
  • Can be used as right or left-handed tool
  • Both directions of rotation possible


  • Short primary processing time
  • Elimination of set-up times and downtimes
  • No occurrence of dust and slurry
  • Only nominal lubrication required (oil or emulsion)
  • Stepless roller pressure adjustment using infeed support
  • Consistent and controlled machining results through measurement of roller pressure
  • Face of the roller free, thus enabling machining close to shoulders and other edges
  • Roller head guidance without play and low-friction
  • Universally useable through modular system
  • Simple replacement of wear parts
  • Two replacement rollers are included in scope of supply

Basic construction

  • Type EG5 single roller burnishing tools consist of a tool body equipped with a tool shank, a spring assembly that allows the roller head to move with no play and very low friction.
  • The standard version contains a dial indicator for indirect indication of the spring force. As an option, the tools can be equipped with ECOsense process monitoring for external display of the spring force.
  • The roller head is attached to the flexible, spring-loaded section of the tool body. It consists of a cage, which contains and guides the burnishing roller, and a support roller with a large-scale needle bearing. 
  • The cage also contains two spare rollers.
  • Tool design includes fixed roller clearance angle α.