1. The dimensional accuracy of the supporting journal and the coaxiality between the supporting journal;
2. The dimensional accuracy of the timing gear journal and the coaxiality relative to the supporting journal;
3. Dimension and position accuracy of keyway;
4. Perpendicularity of the thrust surface relative to the supporting journal line;
5. The dimensional accuracy of the CAM base circle and the coaxiality relative to the axis of the supporting journal;
6. CAM position accuracy;
7. CAM shape accuracy (curve lift), etc.
