Summary

I made this to fix the y axis on my Replicator 2. The motor uses a 5.5mm nut you need to loosen to fix the calibration when your not printing circles correctly.

Also fit in regular hex screwdriver.

Which is for this video.
http://www.youtube.com/watch?v=l1FWj-ZHEVA&list=UUyP94yNLVV7V33hfxZOGmMg

This tool fits my holder. As seen in the picture.
http://www.thingiverse.com/thing:281132

Print Settings

Printer Brand:

MakerBot

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>MakerBot Replicator 2</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>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>On my MakerBot I printed it at 50% infill, 0.2 mm layer and 2 shells. It worked for me. Others have done at 10% infill but 10 shells. So it is based on your preference.</p></div>

Instructions

You can print the 5.5mm socket.stl at 0 extra shells and 100% fill for strength.

This is your chose.

5.5mm Socket