4 Jaw Chuck for Drill. No supports, easy print

thingiverse

This is a simple chuck with reversible jaws that can be put onto any drill. Maximum size is 70mm diameter. Because it's 4 jaw you can put square objects into it as well. Don't expect to make heavy cuts on steel round stock with this, it's still just 3D printed and there are some kinks I have to work out. It's best for sanding and filing larger objects that won't fit in a normal drill chuck. Hardware list: 4x M3x20 pan head (metric) 4x #10x1in hex head (US) 4x #10 nut (US) 1x 3/8in bolt (US) 1x 3/8in nut (US) All of the US hardware I used is from a harbor freight nut and bolt kit, metric is from aliexpress. I recommend at least 20% infill and 3 walls for the main part, 100% infill for the jaws, with higher heat as well to help layer adhesion. You want to print the jaws with the back, not the bottom on the print bed. This is the strongest orientation. IMPORTANT: At 13mm (layer 65 at .2mm) you need to insert the #10 nuts into the slots on the side, the layers take long enough this shouldn't be too hard without pausing the print, just keep an eye on it. Octoprint helps with this kind of thing. To put the knobs on the #10 bolts I just firmly popped them in, and then used a socket and a C clamp to press on the covers. Because the tightening bolts are so far below the jaws, and just push against the M3 bolt, they tend to bend them outward, which makes it easier for parts to slip out, that's something I want to work to find a solution for, perhaps angled jaws to compensate. I also need to adjust the placement of the bolt hole in the jaws, there's a small range that it can't grab onto because it's too tight in the small-diameter setup and too loose for the large diameter setup. I have a 1/4 socket wrench adapter in the files to tighten the jaws, probably overkill. I've also included a "chuck body fitment test" which is a small slice of the chuck body to see if you can easily drop in a #10 nut. This one you will need to pause the print because the print head will never move out of the way enough. You can do that by going into Cura>Extensions>Post Processing>Modify G-code>Add script>Pause at height Then change height to layer number, put in 65. You also want to set a park location like x=10 y=10. Designed in Solidworks, I can provide SLDPT files if requested.