PRECISION MEASURING AND GAGING - OD1642 - LESSON 1/TASK 2
LESSON 1
PRECISION GAGES AND MEASURING TOOLS, AND
TYPES OF FITS, TOLERANCES, AND
ALLOWANCES.
TASK 2.
Describe the proper use and care of precision gages and measuring
tools.
CONDITIONS
Within a self-study
environment
and
given
the
subcourse
text,
without
assistance.
STANDARDS
Within four hours
REFERENCES
No supplementary references are needed for this task.
1.
Introduction
To become effective in any job, one should become proficient with the use
and care of the tools of the trade. As the carpenter could not effectively
perform his job without the proper tools, so it is with the machinist.
There are various types of tools used by the machinists.
They are
classified as precision and non-precision gages. However, during this task,
we will describe the proper use and care of precision gages and precision
2.
Precision Gages
a.
General.
(1) Practically all shops require measuring or gaging. A machinists
will most likely measure or gage flat or round stock; the outside diameters
of rods, shafts, or bolts; slots, grooves, and other openings; thread pitch
and angles; spaces between surfaces or angles and circles.
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