In small batch production, the detection of basic dimensions is mainly done by micrometer, while in large batch production, it is done by special measuring tools.
In the inspection of form and position errors, spline comprehensive gauges are usually used to control the axial parallelism and indexing uniformity of spline teeth or grooves to ensure the interchangeability of spline connections. The shape of the spline comprehensive gauge is just the opposite to that of the internal and external splines to be inspected. Spline plug gauges are used to check internal splines, and spline ring gauge is used to check external splines. Because the spline comprehensive gauge is only used to control the maximum value of the form and position error, not the minimum value, the spline comprehensive gauge (plug gauge and ring gauge) has only one through end, but no stop end. The comprehensive error of the shape and position of the spline hole (shaft) of the part is qualified when the part is inspected by the spline comprehensive gauge. If the gauge passes through the parts looser and faster, it means that the comprehensive error of the parts is smaller.
The answer comes from: Haoyu's Security Machinery Forum.