Reference Parts

  • Master rings
  • Plug gauges
  • CNOMO disks
  • Special masters
     

The Hommel-ETAMIC reference parts enable special and standard methods to be mastered. They are manufactured in treated chromium steel. The treatment gives them hardness between 59 and 62 HRC.
Each reference part is certified individually and delivered in a box with its control report.
Design and manufacturing of high precision masters

Master rings :

  • DIN Ø1 to Ø315
    (DIN 2250 standard shape B)
  • CNOMO Ø3 to Ø120
    (CNOMO E40.31.120.N standard April 1998)
  • Class XX Ø3.81 to Ø114.55
    (ANSI B89.1.6 standard of 1984) 

Plug Gages :

  • ETAMIC plug gage from Ø3 to
    Ø150 mm         (tolerances as per
    NFE 11-011     standard December 1992)
  • CNOMO plug gage (as per CNOMO E40.31.520.N standard April 1998)

CNOMO Master discs

As per CNOMO standard E40.31.520.N (April 1998), Tolerances per NFE standard 11.011  (December 1992).

Special masters

In addition to its line of standard master rings, ETAMIC studies, manufactures and measures special dimensional masters.