Summary

An articulated neck joint that fits between Sophie's shoulders and the base of her head. It is double jointed and has 360 degree rotation.

You can 3d print the nuts and bolts for this neck by using the plastic ones provided (they are also used some of my earlier elbow joints, hence their names).

However, I recommend using 2 x steel M8 40mm long bolts and 2 x M8 nuts.

The ball bearings in the base of the neck use 6mm plastic BB gun pellets.

Print Settings

Rafts:

Doesn't Matter

                                            <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>Normal</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>20%</p></div></p>                                                    <strong>Filament:</strong> Any PLA or ABS                    <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>It is best to print the top ball bearing race (the base of the revolute joint which sits inside the neck) with the joint facing down towards your 3D printer's build-plate. Although this uses more support material it's necessary, because if you print with the ball bearing race flat to the build plate, then you will get support material inside it and your ball-bearings won't run smoothly. You can attempt to print this part without any support, but I doubt that the hole in the joint will form properly because there is an overhang.</p></div>

Articulated Neck