Plug Gauges

A plug gauge, also known as a plug or pin gauge, is a precision measuring instrument used to check the diameter or the depth of holes or bores. It consists of a cylindrical, often tapered, rod or pin with specific dimensions that are designed to fit within the hole being measured. The gauge is manufactured with precise tolerances, ensuring it accurately represents the desired dimensions.

To use a plug gauge, it is inserted into the hole or bore being measured. If the gauge fits perfectly without any force or noticeable play, the hole's size or depth is within the acceptable tolerance range. If there is any resistance or if the gauge doesn't fit smoothly, it indicates that the hole's dimensions are either too small or too large, respectively, and may require adjustments or further inspection.

Plug gauges are widely used in various industries, such as manufacturing, machining, and engineering, to ensure the quality and accuracy of produced components or products with holes or bores. They are essential tools for maintaining tight tolerances in the manufacturing process and ensuring proper fit and functionality of assembled parts.