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Milling
Jigs Used A second jig was made to mill the finger grooves on the sides of each nock. The jig base was made by mounting two index strips on the bottom of a small piece of 1/4 or 3/8 inch plywood. On the top of this base, two 3/4 by 1 inch strips, roughly 6 inches long, were mounted perpendicular to the saw blade 1 1/4 inches apart (or so the dowel will fit snugly). A fence block was also mounted parallel to the saw blades 1 1/4 inches to the left of the left edge of the milling dadoes. This served to put the 1 inch finger groove at the correct distance from each end of the dowel. A specialized milling head, mounting three blades 1 inch wide with a 1/4 inch curve on the exposed corners, was mounted on the table saw. The milling head had to be set so it would cut a groove approximately 3/8 inch deep into the sides of the nock. In the fence block, a 1/8 inch cut was centered vertically. Inserted into this cut is a 1/8 wide metal strip to index into the previously cut string nock. It protruded 3/16 of an inch so the nocks will lock firmly in place. The jig has a groove cut in the deck to allow the milling head to run in far enough to make the finger groove. A stop block on the back end of the jig hangs over the saw’s deck to keep the jig from being pulled back to far on to the milling head when the jig ws pulled back into its starting position. |
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