[HELP] Centering on a rotary table

[TomG]

Dan,

The quickest way for doing a number of parts is to make a plug that will fit snugly to the inside diameter of the parts, with a shaft on it that can be held in a collet or drill chuck in the mill. Then you just center the table with an indicator or edge finder and use your plug thingy to center the parts on the table.

Another way to fudge it with a symmetrical part is to use a pin of known diameter chucked in the mill. If you calculate how far the inner edge of the bore needs to be from center, you can drag the part out that distance on first one axis and then the other. Be sure to double check your work after the part is clamped.

Tom