>> P.28
Equivalent loadStatic equivalent loadThe loads applied to the bearing are divided into radi-When both radial load and axial load are applied to al loads that are applied perpendicular to the central the bearing simultaneously, the virtual load, acting on axis and axial loads that are applied in parallel to the the center of the bearing, that will produce a maxi-central axis. These loads act independently or in com-mum contact stress on the contact surface between bination with other loads.the rolling element and the raceway equal to that given by the radial load and the axial load is dened Dynamic equivalent loadas a static equivalent load. When both radial load and axial load are applied to receive only radial loads and thrust bearings receive the bearing simultaneously, the virtual load, acting on only axial loads. Accordingly, radial loads are directly the center of the bearing, that will give a life equal to used for the radial bearings, while axial loads are that under the radial load and the axial load is dened directly used for the thrust bearings.In the case of needle roller bearings, radial bearings as a dynamic equivalent load.In the case of needle roller bearings, radial bearings [For radial bearings]receive only radial loads and thrust bearings receive only axial loads. Accordingly, radial loads are directly used in the life calculation of the radial bearings, while axial loads are directly used for the thrust bearings.P0r =Fr………………………………………(22)[For thrust bearings]P0a=Fa ………………………………………(23)where,P0r:Static equivalent radial load,NP0a:Static equivalent axial load,N :Radial load,NFrFa Axial load,N[For radial bearings]Pr =Fr [For thrust bearings] ………………………………………(20)Pa=Fa ………………………………………(21)where,Pr:Dynamic equivalent radial load,NPa:Dynamic equivalent axial load,NFr:Radial load,NFa:Axial load,NA25
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