ABB BSM50N Installation And Operating Manual page 13

Step 1c
d.
L
10
20, 000
C
2. Now that capacity is known, it is possible to estimate L
applications load of 130 lbs (570 N) and 1000 RPM.
L
10
This relates to 72,795 hours / 8500 hours/yr = 8.56 years.
Conclusion
Life is a statistical calculation based upon 90 percent of identical parts
reaching or exceeding an estimate. It depends on many different factors and
is impossible to predict precisely, however calculations provide a guideline.
Motor Poles
BSM50/63/80 Series motors are 4 pole (2 pole pair)
BSM 90/100/132 Series motors are 8 pole (4 pole pair)
MN1240
Figure 2-5 BSM90 Load Capacity Curves
Step 1b
Step 1a
Next, insert these numbers into equation (1) above and solve for
capacity "C" (round off for clarity):
3
16667 x C
S F
16667 x C
8000 100
2125
3
16667 x C
F
S
3
3
16 x 10 x C
100
3
8 x10
3
3
3
16 x 10 x 2125
130
3
1 x10
(Radial Force)
with the
10
72, 795 hours
2-6