Tolerances of precision balls 
              
                
                
                
                
                
                  Grade  | 
                  Ball diameter  
                      
                   | 
                  Tolerance  | 
                  Gauge  | 
                  Gauge mean values 
                      
                    
                    
                    (deviation range) 
                    
                   | 
                 
                
                  Dw  | 
                  VDws  | 
                  tDw  | 
                  Ra  | 
                  VDwL  | 
                  interval  | 
                 
                
                  over  | 
                  incl.  | 
                  max  | 
                  max  | 
                  max  | 
                  max  | 
                  I  | 
                 
                
                  Unit >  | 
                  mm  | 
                  mm  | 
                  ¦Ìm  | 
                  ¦Ìm  | 
                  ¦Ìm  | 
                  ¦Ìm  | 
                  ¦Ìm  | 
                  ¦Ìm  | 
                 
                
                  3  | 
                  0  | 
                  12.7  | 
                  0.08  | 
                  0.08  | 
                  0.012   | 
                  0.13  | 
                  0.5  | 
                  -5..-0.5  | 
                  0  | 
                  +0.5..+5  | 
                 
                
                  5  | 
                  0  | 
                  12.7  | 
                  0.13  | 
                  0.13  | 
                  0.020   | 
                  0.25  | 
                  1  | 
                  -5..-1  | 
                  0  | 
                  +1..+5  | 
                 
                
                  10  | 
                  0  | 
                  25.4  | 
                  0.25  | 
                  0.25  | 
                  0.025   | 
                  0.5  | 
                  1  | 
                  -9..-1  | 
                  0  | 
                  +1..+9  | 
                 
                
                  16  | 
                  0  | 
                  25.4  | 
                  0.4  | 
                  0.4  | 
                  0.032   | 
                  0.8  | 
                  2  | 
                  -10..-2  | 
                  0  | 
                  +2..+10  | 
                 
                
                  20  | 
                  0  | 
                  25.4  | 
                  0.5  | 
                  0.5  | 
                  0.040   | 
                  1  | 
                  2  | 
                  -10..-2  | 
                  0  | 
                  +2..+10  | 
                 
                
                  28  | 
                  0  | 
                  50.8  | 
                  0.7  | 
                  0.7  | 
                  0.050   | 
                  1.4  | 
                  2  | 
                  -12..-2  | 
                  0  | 
                  +2..+12  | 
                 
                
                  40  | 
                  0  | 
                  101.6  | 
                  1  | 
                  1  | 
                  0.080   | 
                  2  | 
                  4  | 
                  -16..-4  | 
                  0  | 
                  +4..+16  | 
                 
                
                  100  | 
                  101.6  | 
                  152.4  | 
                  2.5  | 
                  2.5  | 
                  0.125   | 
                  5  | 
                  5  | 
                  -20..-5  | 
                  0  | 
                  +5..+20  | 
                 
                
                  152.4  | 
                  175  | 
                  2.5  | 
                  2.5  | 
                  0.125   | 
                  5  | 
                  10  | 
                  -40..-10  | 
                  0  | 
                  +10..+40  | 
                 
                
                  200  | 
                  175  | 
                  250  | 
                  5  | 
                  5  | 
                  0.200   | 
                  10  | 
                  15  | 
                  -60..-15  | 
                  0  | 
                  +15..+60  | 
                 
               
              (ANSI/AFBMA Std.10, ISO    3290)              |