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RIR Series

The main characteristics are:

  • Software adapted for any type of internal threading tasks including automatic wheel profiling.
  • HF spindles selected for each application requirement.
  • Slides with combination of linear & hydrostatic drives.
  • Vitrified and electroplated CBN wheels for high production requirements.
  • Possibility to integrate OD simultaneous grinding
  • Friendly parametric programming interface.

Technical specifications

RIR 140 / RIR 275 / RIR+RE 250 / RIR SP

Max. Part Lenght210 mm / 350 mm / 350 mm / 700-1000 mm
Max outside diam160 mm / 275 mm / 250 mm / 600 mm
Min internal thread8 mm (*)
Helix angle±15º (**)
*: Smaller diameter under study
** :Larger angles under study


High load nuts
This application is prepared for high force press technology, plastic injection machines, etc…
Small nuts for machine tools and other applications

The internal threading technology is implemented for an amply range of small/medium size nuts.


If your component is not in this list, contact us

Internal threads


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