Summary

There's another er25 spanner on here which didn't fit my chuck, this one does.

Made with FreeCAD and rapid prototyped on an ender3 and Cura's standard pet-g profile.

Print in something half tough or I guess you'll be printing new ones every time you need to get your chuck loose :)

Print Settings

Printer Brand:

Creality

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Ender 3 Pro</p></div></p>                                                                                <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>20%</p></div></p>                                                    <strong>Filament:</strong> esun pet-g                black

How I Designed This

            <p class="detail-caption"><strong>What a MESS!</strong></p>                <p class="detail-title"><strong>Don't do things like I do.</strong></p>            <div><p>I believe you can use radial features in freecad but I don't know how to so I scribbled a sketch and constrained EVERYTHING. </p></div>

ER25 Collet chuck nut Spanner Wrench