I thought I would share my cool knurling tool with you guys since its something a little different from the norm.

It's the best knurling tool I've found and appropriately named the "Best Yet" knurling tool form SPI. It uses two opposed knurls, each mounted in a square holder that can be quickly changed out for various pitches and types of knurls. It is much more rigid than a scissors type due to the solid frame and screw adjustments and readily mounts in a quick change tool post or a drill chuck. The knurl shown below took less than a minute to set up and was to proper depth the second pass. It works equally well on any material and with any pitch, and once you get it set up you can run as many parts as you like and they will all be identical. I'm not sure if SPI still makes this model, but it's a pretty simple design and would make a fairly easy project to build. The frame is aluminum and the knurl holders are hardened steel.

Tom