5. An outer hub rotates around a stationary shaft, supported by two tapered roller bearings as shown in Figure 5. The device is to operate at 224 rev/min, 8 hours per day, 5 days per week, for 7 years, before bearing replacement is necessary. A reliability of 98 per cent on each bearing is acceptable. A free body analysis determines the radial force carried by the upper bearing to be 13 kN and the radial force at the lower bearing to be 22 kN. In addition, the outer hub applies a downward force of 4 kN. m Assuming bearings are available from manufacturer 1 in Table 11–6 with K = 1.5, find the required radial rating for each bearing. Assume an application factor of 1.15.
5. An outer hub rotates around a stationary shaft, supported by two tapered roller bearings as shown in Figure 5. The device is to operate at 224 rev/min, 8 hours per day, 5 days per week, for 7 years, before bearing replacement is necessary. A reliability of 98 per cent on each bearing is acceptable. A free body analysis determines the radial force carried by the upper bearing to be 13 kN and the radial force at the lower bearing to be 22 kN. In addition, the outer hub applies a downward force of 4 kN. m Assuming bearings are available from manufacturer 1 in Table 11–6 with K = 1.5, find the required radial rating for each bearing. Assume an application factor of 1.15.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:5. An outer hub rotates around a stationary shaft, supported by two tapered
roller bearings as shown in Figure 5. The device is to operate at 224
rev/min, 8 hours per day, 5 days per week, for 7 years, before bearing
replacement is necessary. A reliability of 98 per cent on each bearing is
acceptable. A free body analysis determines the radial force carried by the
upper bearing to be 13 kN and the radial force at the lower bearing to be 22
kN. In addition, the outer hub applies a downward force of 4 kN.
Assuming bearings are available from manufacturer 1 in Table 11–6 with
K = 1.5, find the required radial rating for each bearing. Assume an
application factor of 1.15.
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