| COMPARAISON OF TOLERANCES ACCORDING TO ABEC AND ISO STANDARDS | ||||||
|---|---|---|---|---|---|---|
| Symbol | ABEC = Annular Bearing Engineering Committee (USA) ISO = International Standard Organisation | Tolerances in mm according to the standard | ||||
| ABEC 1 ISO P0 | ABEC 3 ISO P6 | ABEC 5 ISO P5 | ABEC 7 ISO P4 | ABEC 9 ISO P2 | ||
| d | Inner diameter | +0.000/-0.008 | +0.000/-0.007 | +0.000/-0.005 | +0.000/-0.004 | +0.000/-0.0025 |
| V dp | Inner diameter variation | 0.010 | 0.009 | 0.005 | 0.004 | 0.0025 |
| K ia | Inner ring runout, measured on assembled bearing | 0.010 | 0.006 | 0.004 | 0.0025 | 0.0015 |
| V Bs | Width variation of inner ring | 0.015 | 0.015 | 0.005 | 0.0025 | 0.0015 |
| Δ Bs | Deviation of an isolated width of the inner ring with respect to the nominal width of the ring | +0.000/-0.120 | +0.000/-0.120 | +0.000/-0.080 | +0.000/-0.040 | +0.000/-0.040 |
| D | Outer diameter | +0.000/-0.008 | +0.000/-0.007 | +0.000/-0.005 | +0.000/-0.004 | +0.000/-0.0025 |
| V Dp | Outer diameter variation | 0.010 | 0.009 | 0.005 | 0.004 | 0.0025 |
| K ea | Outer ring runout, measured on assembled bearing | 0.015 | 0.008 | 0.005 | 0.003 | 0.0025 |
| V Cs | Width variation of outer ring | 0.015 | 0.015 | 0.005 | 0.0025 | 0.0015 |
| Δ Cs | Deviation of an isolated width of the outer ring with respect to the nominal width of the ring | +0.000/-0.120 | +0.000/-0.120 | +0.000/-0.080 | +0.000/-0.040 | +0.000/-0.040 |
| !!! NOT INCLUDED IN THE ABEC STANDARD !!! |
|---|
| Ball surface finish |
| Radial and axial play |
| Lubrication specifications and quantity |