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i Technical Information

7.3. Validation of Holes

For checking of the through holes and blind holes, there are used go/no go plug gauges. The go gauge should be
inserted into a hole with its own weight or with just a little push. The gauge must not be pushed with excessive
force, as it could be jammed. The no go gauge should not let itself to be inserted into a hole.

7.4. Sprawdzanie gwintów
Checking Internal Cylindrical Threads

For checking of the internal threads, there are used go and no go thread gauges. With
the go thread gauge you check the virtual internal thread dimension by checking the
bottom dimension of pitch diameter. The go gauge, when manually screwed in,
should with no special effort let itself to be screwed in for the whole length of the
thread. The thread does not meet requirements, when it proves impossible to screw
the gauge in.

With the no go thread gauge you check whether the pitch diameter exceeds the
upper limit dimension. The no go gauge, when manually screwed in, should with no
special effort go in no further than two thread pitches. If the gauge can be screwed
in further than the two pitches, it means the thread does not meet requirements.

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