A single square thread power screw is to raise a load of 70kN. The screw has a major diameter of 36mm & a pitch of 6mm. The coefficient of friction of the thread & the collar are 0.13 & 0.1, respectively. If the collar mean diameter is 90mm & the screw turns 60rpm, find: (a) power input of the screw; (b) combined efficiency of the screw & collar.
A single square thread power screw is to raise a load of 70kN. The screw has a major diameter of 36mm & a pitch of 6mm. The coefficient of friction of the thread & the collar are 0.13 & 0.1, respectively. If the collar mean diameter is 90mm & the screw turns 60rpm, find: (a) power input of the screw; (b) combined efficiency of the screw & collar.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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(1) A single square thread power screw is to raise a load of 70kN. The screw has a major diameter of
36mm & a pitch of 6mm. The coefficient of friction of the thread & the collar are 0.13 & 0.1,
respectively. If the collar mean diameter is 90mm & the screw turns 60rpm, find:
(a) power input of the screw;
(b) combined efficiency of the screw & collar.
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