Products Precision Ball

APPROXIMATE EQUIVALENT GRADES BETWEEN ISO 3290,
AFBMA, DIN AND OLD "RGP" GRADES


R.G.P.
GRADES		 AAAA AAA AA A B C Ø mm
ISO 3290 5 10 16 28 40 100 up to 3 included
10 16 28 40 100   from 3 to 6 included
10 16 28 40 100 200 from 6 to 10 included
16 20 28 40 100 200 from 10 to 20 included
  28 40 100 200   from 20 to 30 included
  40   100 200   from 30 to 50 included
  40 100 100 200   over 50
 
AFBMA 5 10 16 24 48 100 up to 3 included
10 16 24 48 100 100 from 3 to 6 included
10 16 24 48 100 200 from 6 a 10 included
16 16 24 48 100 200 from 10 a 20 included
  24 48 100 200 300 from 20 a 30 included
  48 48 100 200 300 from 30 a 50 included
  48 100 100 200 300 over 50
 
DIN Class - Class I Class 11 Class III Class IV - up to 3 included
- " I " II " III " IV - from 3 to 6 included
" I " II " III - " IV - from 6 to 10 included
- " II " III " IV - - from 10 to 20 included
" II - " III " IV - - from 20 to 30 included
- - " III " IV - - from 30 to 50 included
- - " III " IV - - over 50

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