The coupling, top, and bottom plates are then clamped together in a "sandwich" and four pilot holes are drilled through both the coupling and the top plate. The coupling holes are drilled by marking out the locations on the coupling. The top plate was faced on both sides the bottom plate was faced on the top surface only. I used an indexable carbide tool for this, although I am sure that an HHS tool would work as well (possibly better, as this is an interrupted cut, which can cause chipping with carbide tools). The plate surfaces were then "smoothed" by mounting the plate in a four jaw chuck on the lathe, and then facing the surface. The other two edges were left as they were on the original piece of steel. I cleaned up the cut edges as noted earlier. Next, measure and cut two pieces 3 inches long.
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