Which gauge is commonly used to measure edge breaks after using the open countersink?

The countersink gauge is specifically designed to measure the edge breaks that occur after using an open countersink tool. This type of gauge typically features a series of calibrated holes or notches that correspond to different countersink angles and diameters, allowing the mechanic to accurately assess whether the countersink has been applied correctly and to the desired depth. Proper measurement of edge breaks is crucial, as it affects not just the aesthetic quality of the finished assembly, but also its structural integrity and performance in various applications.

Other types of gauges, such as diameter, depth, and thickness gauges, serve different purposes. A diameter gauge measures the diameter of holes or components, a depth gauge measures the depth of holes or recesses, and a thickness gauge assesses the thickness of materials. While these tools are valuable in various aspects of assembly mechanics, they do not provide the specific measurements required to evaluate edge breaks from countersinking operations.