Question
11-33 Shown in the figure is a gear-driven squeeze roll that mates with an idler roll. The roll is designed to exert a normal
11-33 Shown in the figure is a gear-driven squeeze roll that mates with an idler roll. The roll is designed to exert a normal force of 35 lbf/in of roll length and a pull of 28 lbf/in on the material being processed. The roll speed is 350 rev/min, and a design life of 35 kh is desired. Use an application factor of 1.2, and select a pair of angular-contact 02-series ball bearings from Table 11-2 to be mounted at 0 and A. Use the same size bearings at both locations and a combined reliability of at least 0.92, assuming distribution data from manufacturer 2 in Table 11-6. Problem 11-33 Dimensions in inches. 4 dia Gear 4 3 dia. 20
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