Flip the part over and you can see the results. Both the part and the table show clean breaks, darned near flush. Compare their impact to the screw ...
As many of you running a CNC router probably already know - work holding can be a royal pain! We have three differently-sized ShopBots at our TechShop location here in San Francisco, all three with their own unique limitations when it comes to work holding. Brass screws inevitably strip out, clamps somehow end up in the way of the tool path, and spray adhesive just doesn't seem to hack it. I just want to say one word to you. Just one word....Plastics. Seems Mr. McGuire in The Graduate was right! Modern polymer nails have most of what we need covered, though with a few notable exceptions worth exploring.
Step 1: Polymer nails for CNC workholding
Companies like Raptor Nails and Staples offer a variety of fasteners, all made from the same high-strength polymer and come in standard sized strips which fit most pneumatic nailers. The tensile (pull) strength of these nails is, in some cases, double that of their steel counterparts which makes for great work holding on your CNC table - as long as you're using a soft spoil board, like MDF.