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A countershaft carrying two V-belt pulleys is shown in the figure. Pulley A receives power from a motor through a belt with the belt tensions shown. The power is transmitted through the shaft and delivered to the belt on pulley B. Assume the belt tension on the loose side at B is 15 percent of the tension on the tight side.
11-14* to 11-17* For the problem specified in the table, build upon the results of the original problem to obtain a Basic Load Rating for a ball bearing at C with a 95 percent reliability, assuming distribution data from manufacturer 2 in Table 11-6. The shaft rotates at 1200 rev/min, and the desired bearing life is 15 kh. Use an application factor of 1.2.
Problem Number | Original Problem, Page Number |
11-14* | 3-68, 151 |
11-15* | 3-69, 151 |
11-16* | 3-70, 151 |
11-17* | 3-71, 151 |
Problem 3-69*
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Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
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