Screw Gauge Measurement
Screw gauging is a precision measuring instrument used to accurately measure the pitch diameter of a screw thread. It is typically used in the manufacturing, engineering and industrial sectors. The device is usually referred to as a pin gauge.
The device is typically composed of two components. The fixed component, sometimes referred to as the main body, is mounted to a workpiece. The other component is the pin, a metal rod or tube, which when inserted into the fixed component measures the pitch diameter of the thread.
The pitch diameter can be accurately measured with a screw gauge due to its very precise design and construction. The pitch diameter is determined by measuring the size of the thread at the two points where the pin and the main body intersect. The most common measurement tools are the American National Standards Institute (ANSI) screw gauge and the Unified Screw Threads (UNC) screw gauge.
The ANSI screw gauge is a standard that is used in the North American region. All the dimensions in this standard are listed in inches. This type of gauge is easy to use as the exact measurements of the thread are listed on the side of the gauge for reference. The UNC screw gauge is a tool that is used specifically for measuring Unified Screw Threads. This type of screw gauge uses metric dimensions.
The basic principle of measurement is similar for both ANSI and UNC screw gauges. The device is inserted constructively into a portion of a thread in order to accurately measure the pitch diameter. The gauge is then slowly lowered into the thread until the pin and the main body intersect. At this point, a measurement can be obtained.
Measuring the pitch diameter of a screw thread is an important part of quality control in the manufacturing industry. It allows manufacturers to ensure that the products they produce meet the required tolerances with regards to their thread sizes. By using a screw gauge to accurately measure the thread size, manufacturers can rest assured that their products will not fail due to incorrect thread sizing.
In conclusion, screw gauge is a precision measuring instrument used to accurately measure the pitch diameter of a screw thread. It is an essential tool in the manufacturing and engineering sectors as it allows companies to ensure that the thread sizing of their products meet the required specifications.
