Find the load that can be lifted by applying a force of 200 N at the end of 450 mm long lever of screw jack using single start square thread. The pitch of the thread is 12 mm and mean diameter 65 mm. The load does not rotate with the screw spindle. The C.O.F. between threads is 0.15 and for collar is 0.12 with mean radius 40 mm. Find also the efficiency.
Find the load that can be lifted by applying a force of 200 N at the end of 450 mm long lever of screw jack using single start square thread. The pitch of the thread is 12 mm and mean diameter 65 mm. The load does not rotate with the screw spindle. The C.O.F. between threads is 0.15 and for collar is 0.12 with mean radius 40 mm. Find also the efficiency.
Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter11: Columns
Section: Chapter Questions
Problem 11.2.4P: Repeat Problem 11.2-3 assuming that R= 10 kN · m/rad and L = 2 m.
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