Kuroda Standard Thread Gauges

Code : Standard Thread Gauges
Brand : Kuroda

A standard thread gauge is a set of a thread plug gauge and a thread ring gauge, each of which is manufactured to have the basic profile and basic size of a thread, and these gauges are designed to fit accurately each other.

The standard gauge is used to inspect threaded parts by checking the degree of passing by fitting the gauge to each of such parts and is also used as a standard of thread size in comparison measurement.

Usage Note

• When large diameter thread products are to be inspected or production quantity is small, standard thread gauges are cost-effective. However, they are not equal to limit gauges of threads from a quality contro standpoint.
• Standard thread gauges are equivalent to (not the same as ) the GO thread gauges of limit gauges for threads prescribed by JIS, and they are not provided with the function of NOT GO thread gauges. Threrefore, if the fit of a product to the standard thread gauges is loose, it is necessary to measure the pitch diameter of the products, when needed.
• As the friction of the standard thread gauge goes on, the fit of the plug gauge to the ring gauge will become loose. The external thread of a product according to circumstances. Therefore, it is necessary to pay sufficient attention to the wear of gauges and to perform periodical check and inspection.