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Clever way to make screws that have no visible screw-head utilizing the tolerances possible with EDM machine tools. Electrical Discharge Machining (EDM) tools are capable of machining part with tolerances of 40 millionths of an inch ( 0.

· These stones easily chamfer surfaces, provide excellent grinding performance, and are more ideal for ribs or narrow slot machining than conventional grind ...

These components mount to the aluminum extrusion t-slots using slide or drop-in nuts and screws, so they are strong, adjustable and require no machining of the aluminum extrusion framing pieces.