I have designed a 2mm pencil lead holder. Feel free to use. Thanks to Jeeprinter for the idea of replacing the collet
PencilHolder.step (178.7 KB)
There is a spring (diameter 6mm x 25mm long) in the top of the holder, with a 3D printed insert which puts pressure on the lead. To prevent the lead falling out when router lifted, I made a metal tensioner from a fruit tin can. Predrill the hole before cutting out. Nut sits behind metal tensioner; The tensioner pushes against the pencil lead. Additional nut is used to stop screw going in too far. Strongly advise not using wife’s sewing scissors to cut this out (very effective though). Spring is held in place by hot glue. Sorry, didn’t take a photo of this before sealing up. Quite effective for drawing.
Used in place of the router’s collet. Take off the Collet and replace. The internal print is tapered so push it up until it engages and then turn to lock
