Abstract: A machine tool bed has guideway rails. A slide is mounted to the rails and has gib blocks spaced along the length of the slide and engaging the rails. The gib blocks are spring loaded to maintain them engaged with the guide rails at all times to provide zero-clearance between gibs and rails. The gib blocks are provided with backing surfaces at self-locking angles such as to avoid displacement of the gib blocks under loading, and maintain constant zero-clearance.

Abstract: A gauge bar assembly is provided with T-nut, quick-action hand clamp brackets to linear bearing blocks of a gauge drive mechanism. Gauge mounting brackets are supported and guided on upstanding tubes in the quick-action clamp brackets. Powered vertical drive for the mounting brackets is provided. A gauge bar having unusually high resistance to bending, due to a unique Y-shaped cross section, is clamped to the gauge mounting brackets. Flip fingers with manually adjustable adjustment wedges, and spring take-up means, are provided for precise horizontal adjustment of gauging fingers toward and away from press brake tooling.