Summary

So I've been using my old mini t-driver for a while now - http://www.thingiverse.com/thing:65138 - but I wanted something a little beefier as I found the old design tended to crack after a while.

Here's the newer design.

Print Settings

Printer:

Prusa i3

                                            <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.2mm</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>80%</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>I wouldn't try making this from ABS as it's probably too soft to take the forces. I've used PLA for this and for the previous design</p></div>

How I Designed This

The source design is available from Onshape - which as a bonus contains an alternative design more similar to the original with much large shoulder chamfers.

https://cad.onshape.com/documents/91d9e7bf22737ed31f8afdae/w/82338bd6e8bebd14c6d7abcc/e/0abfbe9a75ca5a84fc3b2861

Update - I've cleaned up the design a bit and parameterized it to allow for different sizes of driver.

Beefier mini t-driver