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Learning more about ring gages

Learning More about Ring Gages

What are Thread Ring Gages?

A thread ring gage is a gage that is used to measure threads on an outside diameter to ensure that the threads are within the designed tolerance limits. Most thread ring gages are root relieved for adjustability. This adjustment helps you to measure a variety of sizes of threads with accuracy every time while providing longer life for the gage. NOGO thread ring gages are identified by a groove around the outside diameter. For unthreaded parts you would use a plain ring gage or cylindrical ring gage.  Even a slight variance from the design tolerances can cause big problems later on so it is vital to use the right gages and a thread setting plug to maintain accurate thread measurements each and every time.

Thread ring gages are available in steel, chrome or carbide based on your needs and personal preferences. A plain ring gage or cylindrical ring gage is used for checking the external diameter of a cylindrical object. Ring gages are made to variety of tolerance grades in metric and English dimensions for master, setting or working applications. There are three main types of ring gages: go, no go, and master or setting ring gages. Plain ring gages are also manufactured in steel, chrome or carbide.

What does a Thread Ring Gage Do?

The whole point of a thread ring is to guarantee the precision of the outside diameter of your various parts.  The thread ring gage is the device that is used to screw around any threaded parts and test their size down to extremely specific tolerances.  Minute errors in tolerances can cause parts to fail whether they are too large or too small.  Just by merely screwing the correct type of thread ring you can find out whether the part is the right size.  You can also tell whether the threads on the part are within designed tolerance limits to ensure the precision of all your parts.  A plain ring gage will measure the outside diameter of a non-threaded part in a similar fashion.

Using a thread ring gage is a vital part of quality assurance and many problems may be avoided through the proper use of thread ring gages.  The thread ring testing process takes only a few seconds. It verifies that every part and every thread is made in compliance to NIST and all industry standards.

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