BASIC DIMENSIONS Symbol Description d Bearing bore D Bearing outer diameter Df Flange diameter W Open bearing width Ws Shielded bearing width Wi Extended inner race width (open) Wis Extended inner race width (shielded) Wf Flange width (open) Wis Flange width (shielded) li Land diameter (inner race) lo Land diameter (outer race) r Max. mating fillet radius (typical) H Thrust bearing height OTHER PARAMETERS Symbol Description Dw Ball diameter N Number of balls per row Ri Raceway radius (inner race) Ro Raceway radius (outer race) fi Raceway curvature ratio (inner race) fo Raceway curvature ratio (outer race B Total bearing raceway curvature ∆r Radial play ∆a Axial play

OTHER PARAMETERS (continued) Symbol Description α Ball contact angle αo Initial ball contact angle dp Ball pitch diameter uf Free angle of misalignment Fr Radial load Fa Axial or thrust load d Axial displacement under thrust load dN Speed factor fn Lubricant factor L10 Bearing fatigue life (90% reliability) Lna Bearing fatigue life after normal adjustments a1 Material and reliability life correction factor a2 Operating conditions life correction factor P Equivalent load Pr Equivalent radial load Pa Equivalent axial load C Dynamic radial load rating Ct C derated for higher temperature Co Static radial load rating Cs Static axial load rating ft Temperature correction factor fp Interference factor