ABEC ( American Bearing Engineering Committee ) is a bearing development committee that is part of the American Bearing Manufacturers Association (ABMA).
ABEC-5 Standard 608th Skateboard Bearing
The abbreviation ABEC is used to indicate the precision of precision bearings.
Following is ABEC compliance with other standards.
| Abec | ISO 492 | GOST 520 | Manufacturing accuracy |
|---|---|---|---|
| one | P0 | Normal | normal |
| 3 | P6 | class 6 | increased |
| five | P5 | class 5 | high |
| 7 | P4 | class 4 | precision |
| 9 | P2 | class 2 | super precision |
Tolerances, mm
| Inner ring | ||||||
|---|---|---|---|---|---|---|
| ABEC 1 | ABEC 3 | ABEC 5 | ABEC 7 | ABEC 9 | ||
| Diameter | from 0 to −0.008 | from 0 to −0.005 | from 0 to −0.005 | from 0 to −0.005 | from 0 to −0.005 | |
| Radial runout | 0.008 | 0.005 | 0.004 | 0.003 | 0.001 | |
| Maximum width | from 0 to −0.125 | from 0 to −0.125 | from 0 to −0.025 | from 0 to −0.025 | from 0 to −0.025 | |
| Width inconsistency | - | - | 0.005 | 0.003 | 0.001 | |
| Axial runout | - | - | 0.008 | 0.003 | 0.001 | |
| Taper | - | - | 0.003 | 0.003 | 0.001 | |
| Outer Ring [1] | ||||||
| Diameter | 0.008 | 0.008 | 0.005 | 0.005 | 0.003 | |
| Radial runout | 0.015 | 0.010 | 0.005 | 0.004 | 0.001 | |
| Width inconsistency | - | - | 0.005 | 0.003 | 0.001 | |
| Maximum width | from 0 to −0.125 | from 0 to −0.125 | from 0 to −0.025 | from 0 to −0.025 | from 0 to −0.025 | |
| Maximum rim width | - | −0.050 | −0.050 | −0.050 | - | |
| Maximum allowable rim diameter | - | from 0.125 to −0.050 | from 0 to −0.025 | from 0 to −0.025 | - | |
| Axial runout | - | - | 0.008 | 0.005 | 0.001 | |
| External surfaces | - | - | 0.008 | 0.004 | 0.001 | |
See also
- Marking of rolling bearings