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Select one of
these lessons:
Part 1. Types of Fits, Tolerances, and Allowances
There are various workpieces made by the machinist that
require certain types of fits. These fits can be extremely close or they can be a loose or
sliding fit. Whatever type of fit, the engineer notes tolerances and allowances on the
blueprint.The more familiar the machinist becomes with these terms, the easier his job
will be. This task described the types of fits, tolerances, and allowances.
Part 2. Using and Caring for
Precision Gages and Measuring Tools
Measuring workpieces and determining the correct amount of
material needed to be removed is one of the tasks performed by the machinist. The machine,
with the use of a machine tool, can only remove the correct amount of stock as determined
and programmed by the operator. Therefore, as a machinist, it is essential that one
becomes proficient in the use and care of precision measuring tools and gages in order to
machine parts and components to the correct degree of accuracy. Undersized or oversized
work is not acceptable in most machine shops and waste amounts to money lost. It is hoped
that the information in this lesson will enlighten you on the proper use and care of the
various measuring tools and gages.
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About this Course
The purpose of this course is to introduce
the student to the different types of fits, tolerances, and allowances; and
the proper use and care of precision measuring tools used in the machinist
trade. |
