Large Bore Cannon
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Here’s my version. I designed it a bit bulkier than usual, since I’ll be making it out of aluminum, not steel.
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I usually just take a few notes on paper from my cad model and bring that to the shop, but this time I made a real drawing. You can see version 1 there in the back, I’ll get to that in a second.
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I won’t get into it, but it’ll suffice to say that all the following steps I had to do twice. I estimated some of the ak grips dimensions in the cad drawing before I got it, then forgot to update them. I did this whole process once and ended up with a part that didn’t fit. Bummer.
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On to version 2..
First I faced a plate down to the correct thickness. I was able to find a suitable piece of stock in the scrap bin, score :).
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Next I used the readouts to cut out the square profile based on the coordinates from my drawing.
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After that I re-clamped the piece a couple of times and milled off the radius's left over from before.
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I marked the bottom edge where the point of the triangle should go, then scribed the new edges by hand. There’s a little gap between these surfaces and the grip, so they don’t need to be perfectly accurate.