Dial bore gages are used to measure?

Dial bore gages are specifically designed for measuring the diameter of holes, which makes them essential tools in fields like manufacturing and machining. They operate by utilizing a dial indicator that provides precise measurements of the internal dimensions of cylindrical objects. The tool is inserted into the hole, and as it is adjusted, the dial indicates the size and any deviations from the desired diameter, allowing for accurate quality control.

Using a dial bore gage for holes is particularly advantageous because it can provide a more accurate measurement than standard calipers or rulers in many cases, especially in production environments where high precision is critical. This makes them invaluable for ensuring the correct sizing of components that will fit together, such as in engine blocks, bearing housings, or any parts requiring a precise inner diameter.

In contrast, other measurement tools are typically used for threads, flat surfaces, or locating features. Each of these categories has its own specialized tools and methods best suited for those tasks. Threads may be measured with tools like thread gages, flat surfaces are often assessed using surface plates and indicators, and feature localization usually involves coordinate measuring machines or calipers. Thus, the function of dial bore gages in measuring holes highlights their unique and essential role in precision manufacturing.