Bridgeport Milling Machine Parts Diagrams Series IJ and 2J
"HOW TO QUICKLY TRAM A BRIDGEPORT MILL" Extend the quill a little over 3" and lock it. Place a 0-1" dial indicator so that it rests against the top of the quill. Adjust the table to read a preload of 100 thouhs. Crank the table down exactly 3" using the dial on the crank. Multiply the reading times 3.
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