XT-40, a Parametric Hex Bit Grip

prusaprinters

<p>A parametric bit tool holder with a free rolling handle, currently sized for 7 mm bit extension. The slot has a slightly angled grip inside the socket that applies pressure to the shaft in order to keep it firmly secure.</p><p>&nbsp;</p><p>The bottom part of the handle cover requires support, the most pain free method I found was to use a support enforcer and size it for the from the top part of the grip to the bottom part of the handle. . The main point for support is to not touch the grip since it leaves a bad finish. You can try to minimize the effect by changing the support pattern spacing to a lower value or you can use the <code>snug</code> support style from prusa/superslicer or your preferred slicer equivalent.</p><p>After the print is finished I would twist the handle free of the support and use a hobby knife/small chisel to remove the support material.&nbsp;</p><p>I also used 3 walls and 15% infill, larger prints handled fine but for a print with smaller radius values than the default ones I would increase the number of walls and support.</p><p>Sometimes the layer seams would be in the way of the handle so there were some bumps but this seemed completely random as other prints had quite smooth rolling motion. I didn't figure out what the best seam location would be so I used random.</p><p>&nbsp;</p><p>In openscad the variables define the lengths of the object:&nbsp;</p><p>&nbsp;<img src="https://media.printables.com/media/prints/275097/rich_content/3dfaef12-5a36-4518-beee-db6237917ef9/image.png#%7B%22uuid%22%3A%222d68325b-56ef-4009-a324-022e25579732%22%2C%22w%22%3A216%2C%22h%22%3A174%7D"></p><p>In <a href="https://openscad.org/">OpenSCAD </a>use F5 to preview changes and F6 to render the result (this should be done once you are done with the changes since it takes a while to render). Once the rendering process is done you can export the model with F7.&nbsp;</p><p>Printed out of silver PLA and 0.16 layer height and 0.4 nozzle on my FLSUN QQ-s Pro.</p>