ishing a round tablctop on the lathe requires a fairly sturdy lathe. You can accomplish the same thing with a router and a simple pivot pin jig. (See drawing.) The jig is simply a plywood board with a plunge router mounted underneath at one end (with the bit exposed). The other end has a slot for the pivot ('A-in. bolt).
To use the jig, bore a '/«-in. dia. by V-in. deep hole in the center of the tabletop s upper side and place the top upside down over the jig with the hole over the pivot bolt. You can then rotate the top on tile pivot, while the router cuts the rim's profile (both inside and out).
You'll need a few different bits to shape the rim, though if you don't have the suggested bits, feel free to modify the edge to suit your available bits. I recommend a straight bit for cutting the fillet, a core box bit for the cove, a VAn. round-over bit for the bead, and for rounding the underside edge of the top.
Use the jig to shape the rim only. Then remove the top from the jig and dish the rest of the top freehand with a router and a straight bit. Work from the center of the top outward toward the edge. As you approach the edge, you'll need to provide extra support for the router just beyond the edge of the top.—LB.
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