The holes on the indexing plate are used to locate and secure workpieces or tools. Here are some common ways to use the indexing plate holes:

1. Fix the workpiece: Fix the workpiece to be processed on the indexing plate hole with a fixture or fixture assembly to ensure the accurate and stable position of the workpiece. In this way, the correctness of the process steps can be guaranteed when cutting, drilling, processing and other operations are performed on the workpiece.

2. Fixed tool: The cutting tool, drilling tool or other special tool is clamped in the indexing plate hole so that it corresponds to the position of the workpiece. In this way, with the help of the indexing plate, multiple identical or related processing steps can be completed at a certain interval or angle.

3. Calibration measurement: By placing the probe of the measuring tool or measuring instrument in the hole of the graduated plate , the angle or distance measurement value can be accurately obtained. This is very useful for work that requires high accuracy, such as angle measurement, scale calibration, component calibration, etc.

4. Assemble: Place the positioning pins, bolts, nuts and other components of the parts or components to be assembled into the holes of the indexing plate to ensure the relative position and accuracy during assembly.

It should be noted that the quality and accuracy of the indexing plate holes should be carefully checked before using them to ensure that the size and position of the holes are accurate.