Pipe Thread Tri-Roll Gage

A Pipe Thread Tri-Roll Gage is a measuring tool used in the field of plumbing and pipefitting. It is specifically designed to measure the pitch diameter and thread form of pipe threads.

The gage consists of three precision ground rolls that are mounted on a handle. Each roll has a specific thread form, such as NPT (National Pipe Thread) or BSP (British Standard Pipe). These rolls are used to check the accuracy of the threads on pipes or fittings.

To use the Pipe Thread Tri-Roll Gage, you simply place the rolls onto the threads of the pipe or fitting and rotate the gage. If the threads match the rolls perfectly, it indicates that the pipe or fitting has the correct thread form and pitch diameter. If there is any mismatch or interference, it suggests that the threads are not properly formed.

This tool is commonly used by craftsmen and professionals in the plumbing and pipefitting industry to ensure the quality and accuracy of pipe threads. It helps to prevent leaks and ensure proper connections between pipes and fittings.

In summary, the Pipe Thread Tri-Roll Gage is a measuring tool used to check the accuracy of pipe threads. It is an essential tool for craftsmen working with pipes and fittings, ensuring proper connections and preventing leaks.