SPHERICAL THRUST BEARING
Compute contact pressure (Hertz) and friction torque
E
1
GPa
v
1
default ball bearing steel
E
2
GPa
v
2
default Sapphire
R
1
mm
R
2
mm
enter R
2
=0 for sphere on flat
µ
H
GPa
Hardness weakest body
F
N
n
rpm
ω=2πn/60
E'
GPa
R'
mm
r
mm
d
µm
p
m
GPa
p
max
GPa
M
Nmm
q
mW
1)
Half elliptic contact pressure assumed (Hertz) if p
m
<H/3
Uniform contact pressure assumed if p
m
>H
if H/3<p
m
<H then M, q and r are computed by interpolation
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