The basic load rating of a ball bearing is

1. the maximum static radial load that can be applied without causing any plastic deformation of bearing components
2. the radial load at which 90% of the group of apparently identical bearings run for on million revolutions before the first evidence of failure
3. the maximum radial load that can be applied during operation without any plastic deformation of bearing components
4. a combination of radial and axial loads that can be applied without any plastic deformation