I am planning to make my first peppermill and to use a crushgrind mechanism
I have two forstner bits a 9/16 and "1 1/16"
The instructions for making the mill require the drilling of holes of different dimensions
My thoughts are to use one fostner bit "1 1/16" in diameter to drill the holes in the base of the mill in three stages and use a bedan to enlarge each of the first two holes
To make the smaller hole in the top to drill a 9/16 hole then enlarge that hole with a bedan
To check the size of the enlarged holes make a corresponding jam chuck to check the dimensions of the stepped hole in the base