Abstract: A method and apparatus for automatically adjusting a bench type machine feed table extension. The traditional infeed/outfeed table for a planar, jointer or similar machine is extended and the extension automatically maintained at the height of the feed table which it serves. A feed table extension is joined at one end to the feed table and fixed at the other end, below the extension, with a wedge shaped body, so as to present a surface of the body, which is inclined to the horizontal, facing downward. A second wedge body, complimentary to the first, is moveably positioned beneath the extension so as to place its inclined face in registry with that of the first body. Translation of the lower, second wedge body along the axis of feed effects a pushing up or letting down of the first wedge body and, consequently, the feed table extension. The slidable wedge body is coupled by a translating push rod, pivotal dogleg and vertical push rod assembly to the same feed table end to which the extension is fixed.