Measure the ¾-inch plywood to a sheet of 3 feet by 3 feet. Use a carpenter's square to draw a straight line at these measurements. You will need four pieces of plywood that match this measurement.
Cut four pieces of plywood for the sides of the swivel table stand.
Cover two parallel sides of a board with wood glue. Press another piece against the edge of the wood that has the glue on it. Make sure the edges are flush. Repeat this process until the sides of the base for the swivel table have been attached to each other.
Reinforce the glued corners with wood screws drilled through the outside edge of the plywood and into the end of the adjoining plywood.
Cut four pieces of ¾ round, 3 feet long. 3/4 round is a wood dowel that has 1/4 of it cut away so that it can fit over the corner of the table and provide a rounded, finished corner appearance. Spread wood glue on the inside groove of the ¾ round and press the ¾ round over the corners of the swivel table stand.
Cut two pieces of ¾-inch plywood to 3 feet by 3 feet.
Place the bottom half Lazy Susan swivel in the middle of one of the 3-foot-by-3-foot boards. Mark the mounting holes with a pencil.
Pre-drill the mounting holes with the drill and a 1/8-inch drill bit.
Place the top half of the Lazy Susan swivel on the other 3-foot-by-3-foot board and pre-drill the mounting holes for the top half of the swivel.
Replace the Lazy Susan swivel on the board that will support the Lazy Susan swivel and secure the swivel to the board with the screws included. You will need to turn the top of the swivel to gain access to the mounting holes.
Place the other 3-foot-by-3-foot board on top of the swivel and secure it to the swivel with the smooth top screws that are included with the swivel.
Place the mounted swivel boards on top of the swivel table stand. Make sure the edges of the stand and the edges of the bottom swivel board are flush. Turn the top swivel board to gain access to the edges of the bottom board and secure it in place with wood screws.
Cut four pieces of ¾ round to 3 feet with a 45-degree angle on each end so that the ends will fit together at the corners.
Spread glue in the grooves of the ¾ round and position on the edges of the top swivel board to finish off the edges. Allow the glue to dry overnight.
Sand and stain the swivel table as desired.