Stitching Pony / Clamp
After using this a few times, I made some updates (in mid-July 2023) and they’re detailed at the end.
A couple evenings back, I was watching some YouTube in the evening and saw a one-day build by Adam Savage of a stitching pony. I’ve been wanting a stitching pony for a while for when I make a sheath for a knife I’ve made, but watching his build, he was talking about using it for holding metal for filing and a bunch of other uses. That gave me the push I needed in order to build one for myself.
I started by cutting the arms from a piece of pine I had on hand. Rather than using plywood so the arms would be sprung, I decided I was going to use a couple pieces of hinge. It won’t spring open like his does, but I think it’ll still work pretty well, and if I make one of something nicer than pine, I can get fancier.
With the arms built, I found an inch square piece of ash, and drilled a half dozen holes in it. Rather than having a spinning piece of wood to adjust the range of the clamp, I figured multiple holes which I can slot a bolt or a dowel through would be easier. Since drilling round holes is easier than chopping square mortises, I made the hole in the arm with that adjuster a ⅞ inch round hole, and turned the end of the lever arm round on the lathe.
I left the other end square, and cut a slot into it to hold the cam on the lever arm. The cam was a circle drawn using a pop can, then made bigger on one side and smaller on the other. And then once I assembled everything the first time and realized that the handle restricted me to only a half-turn, I adjusted the curve so it would have the full ¾ inch of travel I needed based on the holes I had drilled. To match the square end, I had to chop a square 1 inch mortise in the other arm.
With it working, I added a cleat to the foot of the pony so I can hang it on the cleats on my wall. It’ll get a coat of oil after I contact-cement some leather pads to the jaws tomorrow. With the holes in the lever arm spaced ¾ inch apart, and with six of them, I can clamp anything from paper thin up to 4½ inches thick, though thicker things will have the jaws at an inconvenient angle, so I probably won’t ever use it for anything thicker than an inch or so. But I could make hinged jaws too…
And that’s it.
Update July 17, 2023:
After using the pony some, I made a few minor modifications to make it work better. First, I rounded the bottoms and sides of the jaws, so the thread wouldn’t hang up on them as I was working.
And second, I shortened the atm in the cam clamp. I can’t see ever needing those last two or three adjustment slots, and if I do, I can always make a longer arm again.
I’ll work with those changes for a few more projects, and if they’re good, the pony will get a coat of two of oil.