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What Are Go-no Go Gauges And Its Different Types?

By Author: Frank Xu
Total Articles: 2

What is go-no go thread gauges?

Thread gauges are used to measure the pitch of a thread and they are one of the most important tools in the manufacturing industry. It is used for quality processing as it makes sure that the part remains consistent while they are to be interchanged. Though there are various types of metric thread gauges in use, out of them, go-no go gauges are most highly used and revered. It is not used for finding the exact measurement but to find the sate of acceptability, whether the part can be used or not used. These are mostly used in an industry where there is skill availability because using these thread gauges will require proper usability and calibration. Sometimes using go-no go thread gauges can be difficult, but if one knows the exact measuring skill, then it is very useful in the production floor.

It helps in checking the tolerances, means the piece need to pass one test and need to fail in the other one. The entire test is based on the major diameter T and the pitch diameter Z. The workpiece needs to pass either the major diameter test and fail the pitch diameter test.

Types of go-no go gauges

There are two major types of go-no go gauges which are used in the manufacturing industry in their daily measuring and calibration processes. The gauges are:

Thread ring go-no go gauges:

Thread ring gauges are in ring shape and are one of the most important types of thread gauges used to check the acceptance of a screw. It helps in measuring the depth of a thread and also the correctness of it, along with it one can also measure the pitch diameter of a screw. One can find the thread ring gauges in go-no go type as well, so as to see measure the tolerance of the screw thread. In this, the diameter shall pass whereas the pitch should fail. To check the correctness of a thread ring gauge the gauge is passed through the screw. If the thread ring gauge passes without any pressure or force, then one can be assured of the fact that the ring gauge is good quality. One can find easily adjustable locks on the gauge too, which is very effective while adjusting the screw inside it.

Thread plug go-no go gauges:

In a manufacturing industry, one will have to measure the thread pitch of both screws and nuts. When it comes to measuring the correctness of an internal thread like that of in a nut, then one will have to make use of a thread plug gauge. One can measure the diameter of the pitch using a thread plug gauge. One can also find go-no go gauge for plug gauges, and it is used mostly for smaller elements where one end will be measured by going gauge and the other one by no go gauge. But for larger elements usually, two separate pieces of gauges are used.


Frank Xu is the author of this article on Metric tap. Find more information, about Metric thread taps.

Total Views: 15Word Count: 513See All articles From Author

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