The concept and importance of thread gauges

Introduction:
 
One uses screws, nuts, and bolts almost on a daily basis. These are the normal and basic tools in utility in the industry. These tools have use in every industry. However, do you know that you have to check the gauges of these threaded tools as well? In the production shops, they use the thread gauges to check the pitch of these simple threaded tools.  
 
The need for the checking:
 
It would seem a very innocuous question. You may ask as to what should be there to check in as simple a tool as the screw or a nut. You should understand that an ill-fitting screw can bring down an airplane from the sky within a matter of minutes. No one should underestimate the value of a screw or a nut. The production teams have the important job to check the gauges of each screw and nut before passing them as fit for use in the industry. This brings to light, the concept of the thread gauges. These gauges are simple instruments used for checking and ascertaining the quality of the threaded tools.  
 
We shall now see some simple types of thread gauges used in the industry. Every manufacturing and production industry uses them. Everyone would have knowledge about the screws and the nuts. Therefore, we are not talking about the functioning of these basic instruments. We shall restrict to the functioning of the thread gauges alone.
 
The Go and No-Go thread gauge:
 
There are two types of ‘Go and No-Go’ gauges as well. They are the thread ring gauges and the thread plug gauges. The industrial workers use the thread ring gauges for the shafts and the thread plug gauges for checking the holes.   
 
What do you check with the gauges?
 
You can check the major diameter, the minor diameter, the pitch diameter, the threads per inch, and the flank diameter, etc using the thread gauges. The Go and the No Go gauges work in a typical fashion. The thread of the screw should answer the Go gauge without any kind of force. At the same time, it should not answer the No Go gauge. This would mean that the screw is fit for use. You use this simple technique for measuring the pitch of the normal screw.
 
The industry workers use the thread ring gauges for measuring the acceptance of the screw and the thread plug gauges for the nuts. This is because the screw is an externally threaded tool whereas the nut is an internally threaded one.
 
The advantages of using the thread gauges:
 
There are many advantages. We shall consider the most important ones alone.

• The industry worker would be able to inspect the full thread profile and the pitch of the screw as well.
• You do not require much of training to master this process. In case you are able to use the Go and the No Go thread gauges properly, you can make a fair judgment whether the component is good or bad. 

Final words:
 
The size of the gauges may be very small, but the function they perform is phenomenal.

Contact:

Chenchuan Tools Co.,LTD
Chenbei Industry Zone,
Longgang Road,
Huangshi,Hubei
China,435202
Tel: 0714-7321211
Fax: 0714-7321201

About This Author

gaugestools Joined: December 26th, 2017