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After each operation within the manufacturing process, workpieces must be checked for size, shape or surface finish, This is mostly based on the data of a manufacturing drawing. In addition to judgment by the eye, by the ear and tactile sense as possibilities of non-dimensional testing, dimensional testing methods using sensitive measuring and testing tools are predominantly applied in manufacturing processes.
Testing with measuring tools (measuring):
Lengths and angles of any object are determined (measured) by comparison with a measuring instrument where the exact value measured can be read on a scale.
Figure 1 Measuring
Testing with testing tools (gauging):
Deviations in size or shape of any object are determined (tested) by comparison with a gauge.
This will answer the question as to whether the deviations are within or beyond admissible ranges (tolerance ranges) only. There is no need to know the exact value.
Figure 2 Testing
Which testing methods do you know?
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What is the difference between measuring and gauging?
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