KNRLR - a tool for making knurled bolts which are actually spiky
by chopmeister · from Thingiverse
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This nice thing attaches to your Dremel and lets you make your own M8 knurled bolts for your extruder. Technically speaking it's a "spiked" bolt, not a knurled one, but it's close enough. :) And yes, the name is supercheesy, but I like it anyway.
I made this because the standard Ultimaker knurled bolt doesn't fit the extruder I'm currently designing.
It's modelled in 3dsmax, so no openscad files, sorry :( If anybody wants to make a parametric version be my guest.
