An item of note here is structural steel isn't very dimensionally accurate, places like attaching the Beam to the Mounting Bracket highlight this fact too. Holes were drilled and tapped every 6 inches (152.41mm) to hold studs I made out of 1/4x20 threaded rod ( I don't do metric hardware) The 2 inch (50.8mm) H Beam was drilled with clearance holes to accept the studs. Holes were drilled and tapped into the legs to match the existing holes on the table saw table. My mounting Bracket is a piece of lightweight angle iron with 2 3/4" wide legs (70mm) Lightweight in this case is quarter inch (6.35mm) thick legs. The last three main parts of our cast of characters is the Mounting Bracket, Beam, and Cross Brace. Just keep those plates slightly below the faces of the Fence Arm. That dimension added to the thickness of the Cam Lock Plates determines the steps in the Connection Block that accept the Cam Lock Plates. What is important with this piece though is its thickness. I don't consider this measurement all that critical. My cam is about one and a half inches (1.543 or 39.2mm) in diameter. After I got all done welding this part up then I drilled a hole about a quarter of an inch (6.35mm) off from the center of the piece to accept it's pivot bolt. They wouldn't have been very good cams if they spun on their centers. Note, I did not use the pilot bit in my hole saw when I cut the rounds out of the plate because I did not want my pivot hole in the center of the circles. I didn't have a large piece of round stock to make my Cam Lock out of so I fabricated mine out of rounds I cut out of some plate with square nuts welded between them. The Cam Lock is a very important part as well that needs to be discussed in some detail. This is like finding a $500 bill in your pocket. If you do then this is a great way of justifying having it all. Maybe you have enough of what it takes to make something like this. Not unless they really expanded their metals selection since I last looked. The stock I used to make this fence out of isn't quite your garden variety run down to the big box store and buy it jazz either I'm afraid. I guess I bought a mill because I got sick and tired of being really good with saws, grinders and files though. Maybe if you were really good with a bandsaw a grinder, and did some filing you could get away with just using a drill press to make a fence like I did. I didn't happen to have a large piece of round for my cam though so I welded mine up. Although if you've an even better scrap steel collection than I do then you wouldn't need the welder at all for this project. I used some pretty heavy equipment in this project including a milling machine, TIG welder, and a bandsaw. I have to warn you though if I had to buy the stock to make this fence, or any tools it wouldn't have been a very good deal. Yeah the ones you can buy are pretty expensive aren't they? Mine is about as nice too.
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