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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