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A manual 8 1/4” or 10” diameter 3 jaw buck chuck may be supplied with the rotary table. All the mounting hardware is supplied with this option. To mount the chuck, first mount the adapter plate to the face plate of the table by using the (4) T-nuts and (4) socket head cap screws (supplied). Use a 50MM plug gauge to align the adapter to the thru hole in the table before tightening the (4) socket head cap screws. Remove the 50MM plug gauge, and mount the chuck to the adapter. The buck chuck has (4) adjusting socket set screws in the O.D. of the chuck for fine alignment. (Adjust-True Feature) After adjusting the chuck in true, tighten the mounting bolts in the chuck to securely fasten the chuck to the mounting adapter plate.