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A spring with a spring rate of 75 lb/in has a working deflection of 1 in....

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Mechanical Engineering

A spring with a spring rate of 75 lb/in has a working deflectionof 1 in. It provides a minimum of 150 lb at installation. Thespring is formed from 0.25 in diameter unpeened music wire. Thecoil has squared and ground ends, and it fits in a 2.1 in diameterhole with 0.1 in clearance.

Assuming a 15% clash allowance, find:

a) Safety factor for infinite life in fatigue

b) Shut height

c) Safety factor at shut height

d) Total number of coils

e) Free length

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