certific at e - NOC international

Select Selection ion of bearing design
Rotating load at constant speed
Random load in definable time intervals
Swiveling movement
F 3
t
F 4
Random load in definable time intervals and additionally, modifiable speed
F 2
nn 2
F 3
nn 33
F 4
n 4
F max
Variable load with rather sinusoidal characteristics
F m = 0,75 · F max [kN]
f m
0,95
0,90
0,85
0,80
0,75
0,70
0 0,2 0,4 0,6 0,8 1
F 1
–——
F 1 + F 2
F i Partial unmodifiable load [kN]
n i
t
t
Constant load in the time-slice of the partially
unmodifiable load [kN]
t i Proportion of time of the action of partial load [%]
p Exponent (ball bearings p=3, roller bearing p=10/3)
p
n
i=1
( (Fi n
p F P
i · ti · ni i=1
Fm = ————— ——
100 · nm [kN]
where the mean speed is
n
P + ti )
Fm = —— ————— [kN]
100
ti · ni nm = ———— [min -1 i=1
]
100
p α
Fm = —— [kN]
90
KRW 83