Slewing rings Schaeffler Technologies AG & Co. KG - Industrial ...

2000⋅
M
= -------------------------- K
⋅
F a
D M
P axial
= k F
⋅ F a
C
L = ⎛---
⎝P⎠
⎞ p
16 666
L h
----------------
C
= ⋅ ⎛---
n ⎝P⎠
n = n osc
⋅ --------
90°
⎞ p
–
Load eccentricity parameter
M K
kNm
Dynamic tilting moment load
F a
kN
Dynamic axial bearing load
D M
mm
Rolling element pitch circle diameter (dimension table)
P axial , P radial kN
Equivalent dynamic axial or radial bearing load.
This is used for P in the life formulae for L and L h
k F –
Dynamic load factor (see Figure 5 or Figure 6)
L
10 6 rev.
Basic rating life in millions of revolutions
C a , C r kN
Basic dynamic axial or radial load rating according to dimension table.
p –
Life exponent
for four point contact bearings: p = 3
for crossed roller bearings: p = 10/3
L h
h
Basic rating life in operating hours
n min –1
Operating speed of slewing ring
n osc min –1
Frequency of to and fro movement
Half of swivel angle
F r
kN
Dynamic radial bearing load.
k F
Dynamic radial load factor
50
40
30
20
10
5
4
3
2
F r/Fa
8
6
4
2
1 0,5
0
1 0 2 4 6 8
M k
F a
Load eccentricity factor
10 12 14 16
Figure 5 · Dynamic load factor k F for four point contact
bearings
k F
Dynamic radial load factor
50
40
30
20
10
5
4
3
2
F r/ Fa
8
6
4
2
1
0,5
0
1 0 2 4 6 8
Load eccentricity factor
Figure 6 · Dynamic load factor k F for crossed roller bearings
M k
F a
F r
10 12 14 16
F r
132 514
132 515
17
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