Attendance: Miles, Jim Hiltz, Rick, Wilson, Bob, Lawrence, Paul
We continued to work on the boring jig. Leo has made more refinements on the prototype. (The mock-up was the original one he made and demonstrated for ua a few meetings ago)
Jim Hiltz and Rick have done acceptable work on their project but Paul managed to make a “balls” of his. He cut the platform too short and has to start all over. Instead of sympathy and understanding, he received mockery from some of the lads and was left feeling abashed. So much for camaraderie! (Only Lawrence Martell showed empathy. Perhaps Lawrence had the experience of cutting a few pieces too short in is time).
The overall length of the platform is about 25 inches and it is 11 inches wide and at least one inch thick.
Cut a dado 2 1/2 inches in from each end to accept uprights (1 3/8 thick) and cut tenons on the ends of the uprights to fit snugly in the dado. Do this carefully.
Mark a point in the center of the board 1 1/2 inches in from the dado on one end and then swing an ark 13 1/8 inches up to the opposite end and drill this arc out with 1 / 2 inch holes to create a curved arc. The arc ends about 2 inches in from the side edges. Drill the first marked point to 1/2 inch also.
Drill a series (see photo) of 1/4 inch holes along each edge, spacing them about 11/16 inches apart on center and starting 1 1/2 in in from the edge for the first one.
Use a jig on the drill press to include a pin to insure that each hole is identically separated from the rest.
Flip the board to drill the holes on the opposite end.
The upright will have a through hole bored across its length ( 1 3/4 inches in from the tenon end) to accept the threaded rod. This hole is bored at 7/16 inches (the hole is then threaded to 1/2 inches).
A special jig is used on the press to drill the hole part way through one side, flip it and do the other side and then finish it with a hand drill. It consists of a welded iron right angle brace, against which the workpiece is clamped to make sure that it is 90 degrees to the bit travel. (see photos)
Take care to do a test piece the same thickness as your wood member so that the hole is exactly centered. Lay the test piece on top of the assembled workpiece/squaring jig and play with it until the bit enters correctly when the piece is flipped end to end.Do not move the drill press set up once this is set.
See photos.
Take care to do a test piece the same thickness as your wood member so that the hole is exactly centered. Do not move the drill press set up once this is set.