REXNORD - MARBETT - MCC
B75
e1
Y1
Y2
Yo
20
0,30
2,1
3,3
2,2
25
0,28
2,2
3,5
2,5
30
0,25
2,5
3,9
2,5
35
0,23
2,7
4,2
2,8
40
0,22
2,9
4,5
2,8
P
Fr
Fa
x, Y
e1, Y1, Y2
1200
A
B
C
D
P = Fr
P = X • Fr + Y • Fa
P = Fr
P = Fr + Y1 • Fa
P = 0,65 • Fr + Y2 • Fa
Co
e
x
y
x
y
0,025
0,22
1
0
0,56
2
0,04
0,24
1
0
0,56
1,8
0,07
0,27
1
0
0,56
1,6
0,13
0,31
1
0
0,56
1,4
0,25
0,37
1
0
0,56
1,2
0,5
0,44
1
0
0,56
1
Fa
Fr
— ≤ e
Fa
Fr
— > e
Fa
Fr
— ≤ e1
— > e1
Fa
Fr
Fr
Fr
Fa
Fr
Fr
Fa
Calculation data
It
should be common practice to include operational factors when calculating bearing
dimensions to allow for load variations which may happen during running of the
plant. The coefIcients given here under are indicative only and are based on actual
operational experience.
Operating conditions coefIcients
Equivalent dynamic load P
calculation
Table 2
- Equivalent dynamic load P calculation
With steady loads/light impacts:
multiply the equivalent dynamic load P by: 1,2 ÷ 1,5
With loads and medium impacts:
multiply the equivalent dynamic load P by: 1,7 ÷ 2,0
Table 3
- ²oad factors x, y
Table 4 - Factors e1, Y1, Y2, Yo
Co = Static load coefIcient (N).
The values are indicated in the support dimensional tables.
= equivalent dynamic load (N).
= radial load acting on the bearing (N).
= axial load acting on the bearing (N).
= load factors. See Table 3.
= factors. See Table 4.
Bearing
Type
²oad direction on
the bearing
Equivalent dynamic load P (N)
calculation formula
With:
With:
Ratio
Fa
—
with
with
Int. dia.
bearing
mm