4mm x 1/4inch bit adapter (for using 4mm bits)

cults3d

Update: This has lasted for three weeks with lots of use, and I'm actually really impressed. I thought for sure it would strip and/or crumble easily after heavy use, but so far, so good. Two other bits have been around for less time than this little beauty, which leads me to think I might make some more bit holder type tools. This adapter is designed for using 4mm hex bits with a 1/4 inch tool. To get a snugger fit, simply stick a thin piece of plastic in the slot at the 1/4 inch end. I'm surprised by how well this works - it doesn't break easily like I expected, and the bit goes in pretty smoothly but usually gets tight when you apply torque. In most cases, I have to pull it out with pliers. I've been using it every day for a week now, and it's still holding up, so I'd call it a decent item. I printed this adapter in PLA with 1.2mm walls, 85% infill, and 5 degrees hotter than usual to give it extra strength. Use at your own risk - no promises here.