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Home > Ordnance Documents and other related manuals > > Task 3. Describe the various Threads forms, Uses, calculation. and Machining Techniques.
Conclusion - Od16450106
Screw Thread Terminology

Lathe Operations
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LATHE OPERATIONS - OD1645 - LESSON 1/TASK 3
LESSON 1
THE LATHE USES AND SAFETY; USES, REPAIR, AND
ADJUSTMENT OF LATHE ATTACHMENTS; AND VARIOUS
THREAD FORMS, USES, CALCULATIONS, AND
MACHINING TECHNIQUES
TASK 3.
Describe  the  various
threads
forms,
uses,
calculations,
and
machining techniques.
CONDITIONS
Within  a  self-study
environment
and
given
the
subcourse
text,
without
assistance.
STANDARDS
Within two hours
REFERENCES
No supplementary references are needed for this task.
1.
Introduction
There are numerous mechanical devices used in modern technology to transmit
motion, force, and to fasten components together.  One of these devices in
the screw thread.  Screw threads are made in various forms, such as V-form
threads, Acme threads, and Square threads.
Each of these thread forms is
used  for  specific  purposes.
The  V-form  threads  are  commonly  used  on
fastening devices such as bolts and nuts as well as on machine parts.  Acme
threads are generally used for transmitting motion, such as between the lead
screw and lathe carriage.
Square threads are used to increase mechanical
advantage and to provide good clamping ability as in the screw jack or vise
screw.  Each of these screw forms will be further discussed in this task.
2.
Screw Thread Cutting.
102






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