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I've been meaning to make some assembly squares on the CNC for a while, and yesterday I finally got around to doing it. The squares are made from 3/4" (18mm) BBP. I also made a DIY version of the Woodpeckers CSP clamps. I cut a 3/8" square U-bolt in half to make two L-bolts. The U-bolts were from my local Lowes, and they're a bit long for casework, but they might come in handy some day. I've got shorter ones on order from McMaster-Carr. Initially, I thought I'd insert metal sleeves in the sliding clamp piece, but I think I'll give them a try as-is first and see how they work. I can always retrofit a sleeve later.
I was concerned that the clamping face might bend away from 90-deg, but with the force needed for an assembly clamp, it seems to work fine. It's certainly not to the tolerances of the Woodpeckers clamp, but good enough. And considerably cheaper.
I was concerned that the clamping face might bend away from 90-deg, but with the force needed for an assembly clamp, it seems to work fine. It's certainly not to the tolerances of the Woodpeckers clamp, but good enough. And considerably cheaper.
