We sell all over the world precision spheres for pin on disk (ball on disk) tribometers.



Our spheres are available in diameters from 1 mm up to 30 mm.


We have spheres made of different materials:


  • steel
  • alloys
  • hard metals
  • rubber
  • plastic
  • glass
  • Ceramic



Grade Diameter tolerance (μm) Sphericity tolerance (μm)
GR. 0 ±10 5
GR. I ±25 12
GR. II ±50 25
GR. III ±125 60



In order to have the prices, Contact us, specifiying the material, the grade and the quantity needed