correction factor K
C
tot
σ
HP
/ σ
H lim
= (Z
NT
· Z
L
· Z
v
·Z
R
·Z
w
·Z
x
) / S
H
Z
NT
= 1.1...1.6 life factor for contact stress for reference test conditions
Z
L
= 0.9...1.1 Lubricant factor.
Z
V
= 0.9...1.1 Velicity factor
Z
R
= 0.8...1.1 Roughness factor affecting surface durability
Z
W
= 1.05...1.25 Work-hardening factor
Z
X
= 0.7...1.0 Size-factor for pitting.
S
H
= 1.2 safety factor from pitting.
σ
HP
/ σ
H lim
= (Z
NT
· Z
L
· Z
v
·Z
R
·Z
w
·Z
x
) / S
H
enter new value in the main program window manually !
σ
H lim
= nominal contact stress from test wheels (pitting).
σ
HP
= permissable contact stress actual gears.