Knob/crank handle for 5/16 inch carriage bolt
thingiverse
I'm using this with Marcus Wolschon's PCB vise http://www.thingiverse.com/thing:9280 but you could use it with any project that requires a knob or crank handle. I'm using a 5/16 inch carriage bolt in place of Marcus' M8 threaded rod because it's easier to find in hardware stores in the U.S.. I also have a couple different lengths so I don't have to have a long bolt hanging out of the side if it's holding a large PCB. I'm also using 1/8 inch smooth rod in place of the M4 smooth rod. It fits just fine into the existing holes without modification. Instructions Print, push 5/16 inch carriage bolt through square hole, secure with 5/16 inch nut.
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