Types and Uses of Plug Gauges
Plug gauges are available in several different types. These include: Go plug gauges No-go plug gauges Combination go/no-go plug gauges Go plug gauges and no-go plug gauges are called single-ended gauges and consist of a handle into which a precisely machined pin or shaft has been inserted (sometimes called a member) and which is used to verify an aspect of the dimensional tolerances of the hole. For single-ended gauges, they are usually offered in pairs with one go gauge and one no-gauge gauge. In its use, a go plug gauge is designed to test the minimum dimensional limit of the hole (i.e. the lower tolerance of the hole ’ s diameter) which represents the maximum amount of remaining material on the part or workpiece. For an acceptance condition, the go plug gauge should fit in the hole. If the go plug gauge will not fit into the hole in the workpiece, then that is an indication that the hole ’ s diameter is too small (an insufficient amount of material has been removed from the wo...