plaquette MACHLINE - Ntn-snr.com
plaquette MACHLINE - Ntn-snr.com
plaquette MACHLINE - Ntn-snr.com
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Two methods for application<br />
Preloading by tightening faces of bearings in an assembly<br />
Before<br />
tightening<br />
After<br />
tightening<br />
Preloading using calibrated springs<br />
Before tightening<br />
After tightening<br />
F<br />
Definition of symbols<br />
Pr Preload<br />
a Distance between the 2 spacers (µm)<br />
K Deflection constant (µm (daN) -2/3 )<br />
Pr i Initial preload (daN)<br />
Pr s Preload required (daN)<br />
PE Equilibrium preload for an assembly<br />
CD Separation load<br />
Fa Axial load<br />
Fr Radial load<br />
P Equivalent dynamic load<br />
C Basic dynamic load<br />
P 0 Equivalent static load<br />
C 0 Basic static load<br />
N Rotation speed (rpm)<br />
L 10 Nominal service life (hr)<br />
f s Safety factor<br />
L na Corrected service life (hr)<br />
N.Dm Speed factor<br />
13
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