Bore Gauges

A bore gauge, also known as a bore dial gauge, is a measuring instrument used to measure the internal diameter of a hole, cylinder, or tube. It is commonly employed in manufacturing, machining, and maintenance applications to ensure that the internal dimensions of a bore meet specified tolerances. Bore gauges come in various types, each suitable for specific applications. Here are some common types of bore gauges:

Telescoping Bore Gauge:
This is one of the most basic types of bore gauges. It consists of a set of telescoping rods or plungers that expand when inserted into a bore. The user measures the bore diameter by reading the scale on the gauge or by transferring the measurement to a separate measuring tool.
Dial Bore Gauge:
A dial bore gauge is an improved version of the telescoping bore gauge. It includes a dial indicator or a digital readout that provides a direct reading of the bore diameter. This type of bore gauge is often more accurate and easier to use than the telescoping variety.
Three-Point Bore Gauge:
This type of bore gauge uses three contact points to measure the internal diameter of a bore. It provides greater stability and accuracy compared to telescoping gauges, making it suitable for high-precision applications.
Pistol Grip Bore Gauge:
The pistol grip bore gauge is a handheld instrument with a pistol-grip handle and a measuring head. It typically has a digital or dial indicator for easy and quick readings. This type is convenient for one-handed operation.
Split Ball Bore Gauge:
A split ball bore gauge has two halves with a ball-shaped contact point on each end. The gauge is inserted into the bore, and the halves are expanded until they make contact with the bore wall. The measurement is then read directly or transferred to another measuring device.
Air Bore Gauge:
An air bore gauge uses air pressure to expand a measuring head within the bore. The air pressure is regulated to ensure that the measuring head makes light contact with the bore, providing a highly sensitive and accurate measurement.
Bore gauges are essential tools in industries where precise internal measurements are crucial, such as in machining, engine building, and quality control. They help ensure that manufactured components meet the required specifications for internal diameter, roundness, and concentricity. The choice of bore gauge depends on factors such as the required level of precision, the size of the bore, and the specific application.