200 mm B 200 mm -Bk C,k 150 mm C,i Cyj

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
Section5.4: Manual Lathe Threading
Problem 3RQ: How many classes of fit are there in the Unified National system?
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A blade held in a brace is used to tighten a screw at A. (a) Determine
the forces exerted at B and C, knowing that these forces are equivalent to a force-couple system at A consisting of R =-(30 N)i + Ry j+ Rz k and M = –(12 N · m)i. (b) Find the corresponding values of Ry and Rz. (c) What is the orientation of the slot in the head of the screw for which the blade is least likely to slip when the brace is in the position shown?

200 mm
B 200 mm
-Bk
C,k
150 mm
C,i
Cyj
Transcribed Image Text:200 mm B 200 mm -Bk C,k 150 mm C,i Cyj
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