The bevel gear is mounted on the shaft and can be finely tuned by means of what kind of structure or part it is positioned on the shaft so that the meshing is in good condition
A little easier, you can add a structure at the end of the shaft, screw to the top axis, so as to promote the location of the shaft. If you want to fine tune, use a fine thread screw.
Add 2.5 fan flat pads to the axial alignment of the bevel gear, and then place a bowl type condom outside the gasket (to prevent flat pads from falling off). Adjust the thickness of the mat to meet your requirement.
Method two: on the shaft to do the same screw thread, with the fixed nut, but also the same principle can be adjusted. This method is time-consuming, laborious and costly.
