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Steel and Stainless Steel Balls: Table of Tolerances
Table of Tolerances Based on the Standard DIN 5401
| Class |
Nominal
Diameter
in mm |
Gauge
Allowance
in
Micrometers |
Tolerances
in each
grade
in µm |
Mean allowances in Each Grade
in µm |
Deviation from Spherical Form in µm |
| I |
jusqu'à 10 |
+/- 10,25 |
0,5 |
-10 ... -1,5 -1 -0,5 0 +0,5 +1 +1,5 ... +10 |
0,5 |
| II |
jusqu'à 25 |
+/- 10,50 |
1 |
-10 ... -3 -2 -1 0 +1 +2 +3 ... +10 |
0,5 |
| III |
jusqu'à 25 |
+/- 11 |
2 |
-10 -8 -6 -4 -2 0 +2 +4 +6 +8 +10 |
1 |
| |
de 25 à 50 |
+/- 13,5 |
3 |
-12 -9 -6 -3 0 +3 +6 +9 +12 |
1,5 |
| |
de 50 à 75 |
+/- 14 |
4 |
-12 -8 -4 0 +4 +8 +12 |
2 |
| |
de 75 à 100 |
+/- 17,5 |
5 |
-15 -10 -5 0 +5 +10 +15 |
2,5 |
| |
de 100 à 125 |
+/- 21 |
6 |
-18 -12 -6 0 +6 +12 +18 |
3 |
| |
de 125 à 150 |
+/- 24,5 |
7 |
-21 -14 -7 0 +7 +14 +21 |
3,5 |
| IV |
jusqu'à 10 |
+/- 14 |
4 |
-12 -8 -4 0 +4 +8 +12 |
2 |
| V |
jusqu'à 25 |
+/- 75 |
50 |
-50 0 +50 |
25 |
| |
de 25 à 50 |
+/- 113 |
75 |
-75 0 +75 |
38 |
| |
de 50 à 75 |
+/- 150 |
100 |
-100 0 +100 |
50 |
| |
de 75 à 100 |
+/- 188 |
125 |
-125 0 +125 |
63 |
| |
de 100 à 125 |
+/- 225 |
150 |
-150 0 +150 |
75 |
| |
de 125 à 150 |
+/- 263 |
175 |
-175 0 +175 |
88 |
| VI |
|
+/- 200 |
400 |
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For steel balls 100C6, multiply the values in class III, columns 3, 4, 5 and 6................................ by 5
For unhardened stainless steel balls the values in class III, columns 3, 4, 5 and 6 ......................by 5
For hardened stainless steel balls, multiply the values in class III, columns 3, 4, 5 and 6 ............by 2
For bronze or brass balls, multiply the values un class III, columns 3, 4, 5 and 6 ........................by 10
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