Design a shaft for the situation of the industrial roll of Prob. 74 with a design factor
Question:
Design a shaft for the situation of the industrial roll of Prob. 7–4 with a design factor of 2 and a reliability goal of 0.999 against fatigue failure. Plan for a ball bearing on the left and a cylindrical roller on the right. For deformation use a factor of safety of 2.
Prob. 7–4, A geared industrial roll shown in the figure is driven at 300 rev/min by a force F acting on a 3-in-diameter pitch circle as shown. The roll exerts a normal force of 30 lbf/in of roll length on the material being pulled through. The material passes under the roll. The coefficient of friction is 0.40. Develop the moment and shear diagrams for the shaft modeling the roll force as (a) a concentrated force at the center of the roll, and (b) a uniformly distributed force along the roll.
These diagrams will appear on two orthogonal planes.
4 dia 20° Gear 4 3 dia.
Step by Step Answer:
a One possible shaft layout is shown in part e Both bearings and the gear will be located against shoulders The gear and the motor will transmit the t...View the full answer
Shigleys Mechanical Engineering Design
ISBN: 978-1121345317
9th edition
Authors: Richard G. Budynas, J. Keith Nisbett
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