Machine Design I

Shown in the figure below is a gear-driven squeeze roll that mates with an idler roll. The roll is designed to exert a normal force of 6.12 N/mm of roll length and a pull of 4.90 N/mm 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 to be mounted at O and A. Use the same size bearings at both locations and a combined reliability of at least 0.92. Dimensions in the figure are in mm.