ISO 76:20064 pdf download.Rolling bearings -Static load ratings.
NOTE 1 In the case of a single-iow angular contact bearing, the radial load rating refers to the rac5al component of that load which causes a purely radial displacement of the bearing rings ii relation to each other.
NOTE 2 For these contact stresses, under static load, a total permanent deformation of rolling element and raceway occurs which is approximately 0.0001 of the rolling element diameter.
3.3
basic static axial load rating
static centric axial load which corresponds to a calculated contact stress at the centre of the most heavily loaded rolling elementlraceway contact of
— 4 200 MPa for thrust ball bearings, and 4 000 MPa for all thrust roller bearings
NOTE For these contact stresses, under static load, a total permanent deformation of rolling element and raceway occurs which is approximately 0.000 1 of the rolling element diameter.
3.4
static equivalent radial load
static radial load which would cause the same contact stress at the centre of the most heavily loaded rolling element/raceway contact as that which occurs under the actual load conditions
3.5
static equivalent axial load
static centric axial load which would cause the same contact stress at the centre of the most heavily loaded rolling element/raceway contact as that which occurs under the actual load conditions
3.6
static safety factor
ratio between the basic static load rating and the static equivalent load, giving a margin of safety against inadmissible permanent deformation on rolling elements and raceways
3.7
roller diameter
(calculation of load ratings) theoretical diameter in a radial plane through the middle of the roller length for a symmetrical roller
NOTE 1 For a tapered roller, the applicable diameter is equal to the mean value of the diameters at the imaginary sharp corners at the Large end and at the small end of the roller
NOTE 2 For an asymmetrical convex roller, the applicable diameter is an approximabon of the d.wneter at the point of contact between the roller and the ribless raceway at zero load.
NOTE 2 For these contact stresses, under static load, a total permanent deformation of rolling element and raceway occurs which is approximately 0.0001 of the rolling element diameter.
3.3
basic static axial load rating
static centric axial load which corresponds to a calculated contact stress at the centre of the most heavily loaded rolling elementlraceway contact of
— 4 200 MPa for thrust ball bearings, and 4 000 MPa for all thrust roller bearings
NOTE For these contact stresses, under static load, a total permanent deformation of rolling element and raceway occurs which is approximately 0.000 1 of the rolling element diameter.
3.4
static equivalent radial load
static radial load which would cause the same contact stress at the centre of the most heavily loaded rolling element/raceway contact as that which occurs under the actual load conditions
3.5
static equivalent axial load
static centric axial load which would cause the same contact stress at the centre of the most heavily loaded rolling element/raceway contact as that which occurs under the actual load conditions
3.6
static safety factor
ratio between the basic static load rating and the static equivalent load, giving a margin of safety against inadmissible permanent deformation on rolling elements and raceways
3.7
roller diameter
(calculation of load ratings) theoretical diameter in a radial plane through the middle of the roller length for a symmetrical roller
NOTE 1 For a tapered roller, the applicable diameter is equal to the mean value of the diameters at the imaginary sharp corners at the Large end and at the small end of the roller
NOTE 2 For an asymmetrical convex roller, the applicable diameter is an approximabon of the d.wneter at the point of contact between the roller and the ribless raceway at zero load.
