Golden Spiral Cam Clamp

thingiverse

This is a precision surface cam clamp designed for securing stock on a workbench. The harder you press against it, the tighter it grips the stock, making it perfect for hand-planing small pieces by hand. The clamp is specifically engineered to pair with a 20mm metric bolt that fits snugly into a 20mm hole in the workbench. A left and right version are available, but owning one piece can get the job done if you already have standard holders installed. Instructions Fines are printed using PLA filament at a precise Z resolution of 0.22mm. I conducted extensive testing with infill ratios ranging from 15% to 25%, achieving success in each trial. After printing, a non-slip material should be attached to the spiral face to prevent slipping. I personally used strips of air tube and thin double-stick tape with great results so far.