Making a milling cutter from a grinder is simple, you need to make a platform with a mount and find suitable nozzles. In order to use special nozzles, a chuck from a conventional drill is installed in the angle grinder.
For crafts, you need a steel plate and a little square pipe. It is necessary to weld to the base perpendicular to the profile pipe, at such a distance that the angle grinder is fastened between the two guides.
Be sure to make height adjustment, for this, a profile of a different section is used, which is included in each other and wing bolts for fixing.