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Since the PS internal thread is a combination of PT external thread , a tapered plug gauge (PT) is used for pass/fail judgment.
However, only if the PS internal thread uses a PS external thread (now obsolete) and the PS plug gau
gauge There is a difference between new and calibrated tolerances.
The tolerance after calibration is wider than that of a new one due to the amount of wear.
The calibration certificate states the tolerances above and the tolerances of the wear limits.
* In the JIS handbook, there is a separate description as a wear limit.
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A standard thread gauge is a gauge that has been correctly made to the reference angle and dimensions of the thread.
Applications include being used as a master gauge in comparative measurements, as well as for direct mating and inspecting the mating of screws.
Accuracy cannot be guaranteed, as in
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You only need one traceability certificate for all types of gauge .
One calibration certificate is required for each type of gauge .
The gauge types are divided into plug gauge , ring gauge , tapered gauge ,