"Stubbs" & "Chubbs" Driver Bit Handles

prusaprinters

<p>Introducing “<strong>Stubbs</strong>” and “<strong>Chubbs</strong>", my own design of driver bit handles that keep the bit securely inserted. &nbsp;A “retention finger” feature inside the handle keeps the bits from falling out.&nbsp;</p><p>It took 4 iterations to refine the retention finger to hold tightly without slop and the hex hole to fit nicely without too much friction for insertion and extraction. &nbsp;Of course performance varies depending on how tuned your printer is.</p><p>“Stubbs” is the bigger brother of “Chubbs”. &nbsp;Use “Stubbs” for a good sized grip and use “Chubbs” in tight spaces.</p><p><strong>Note:</strong> if there is stringing inside the hex (likely) you may experience too tight a fit, so you can use a bit to insert/remove several times to help clear the stringing and loosen the fit.</p><p><strong>Updated 5/16/2022:</strong></p><p>There was a suggestion from @Tom in MN to make the hex receiver shallower to accommodate bits with shorter shafts. &nbsp;A v2 was added with 13mm from the face to the retention finger instead of the original 16mm. Overall length of handle unchanged.</p><p><strong>Recommendations:</strong></p><ol><li>Print in PETG (if you use PLA, the retention finger might break)</li><li>0.2mm layer</li><li>3 walls, minimum</li><li>Top: 5 layers or more, bottom: 4 layers</li><li>Triangle infill, at least 20% (but you can try others)</li></ol><p>If you like this model and/or add to your collection, please give a <strong>LIKE </strong>and some stars to help others find it.</p><p>Please also post a make, I'd love to see it!</p><p><strong>Happy printing!</strong></p><p>&nbsp;</p>