1, determine the host drive as external loading in circumferential direction, radial and axial force;
2, will contribute to the whole and as a parallel to the axis perpendicular to the axis of the two forces, namely axial force and the centripetal force;
3, according to the shaft fulcrum of balance condition, find Fulcrum bearing reaction forces, SKF bearing of external loading;
4, according to the support the centripetal force and axial force of size and scale, identifying suitable to withstand this force bearing type;
5, according to a certain rule of these external forces, converted to impose the equivalent dynamic load for SKF bearings, for bearing fatigue life calculation of need;
6, sometimes to move these forces by another rule, converted to impose the equivalent static load for SKF bearings, permanent deformation happened to check bearings.