The questions is this:  A 5000-lb. gear box is provided with a steel (as rolled B1113) eyebolt for use in moving it. What size bolt should be used: a.if UNC threads are used? b.If UNF threads are used? c.If the 8-thread series is used?  and I got the answer in the picture provided.

Precision Machining Technology (MindTap Course List)
2nd Edition
ISBN:9781285444543
Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Chapter5: Turning
Section5.5: Taper Turning
Problem 4RQ: What are the TPI and TPF of a part with end diameters of 3/4" and 1/2" and a taper length of 4.25"?
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The questions is this: 

A 5000-lb. gear box is provided with a steel (as rolled B1113) eyebolt for use in moving it. What size bolt should be used: a.if UNC threads are used? b.If UNF threads are used? c.If the 8-thread series is used?  and I got the answer in the picture provided. 

Can you explain further the basis of the choice of the design factor?

C
UNC threads
A $ = 0·0454³n"
UNF Threads :-
0
5
D=-18 in
16
50
16
D=S₂ in
ть
Hp ≤0·0524 in 29.
& thread Saig
in
Transcribed Image Text:C UNC threads A $ = 0·0454³n" UNF Threads :- 0 5 D=-18 in 16 50 16 D=S₂ in ть Hp ≤0·0524 in 29. & thread Saig in
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