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ROUND TOP CASINGS
(CONSTANT RADIUS SIZE ARCS)
We manufacture knives with the profile cutting the deepest portion of the cut on the open
side of the machine. Notify us when you order a knife if you want the deep side of the cut
on the vertical tube side of the machine.
The set up and operation of the W&H machine for a round top molding job is very similar
to the straight molding set up. Our EJ92 Elliptical Jig is not needed for a fixed, constant
radius.
Stock preparation can be done in many ways. The following is one example.
First determine the angle needed to cut the wood sections in order to stay within the
selected radius. Lay out the wood sections by marking the angles while being careful to
select cuts for grain structure and color. Then cut the sections and biscuit join and glue
them together.
We made a fixture to band saw the inside and outside radii consisting of a pivot bar and
bracket. We mounted the pivot bar to the stock on the scrap portion of the inside radius.
The pivot bar is drilled with numerous holes to accommodate any radius sizes. You may
also want to design a fine adjuster to allow you to make any radius in between your
adjusting holes. Make sure the outside radius is cut first.
The guides should be 20” long, which is the length of the GS1 guide system, or 14” long if
you are just using the bed of the machine. The guides may be made using the band saw set
up. We make one guide for the inside radius and one for the outside radius. We use MDF
board.
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