Summary

The GMT hand on the NH34 is needs a larger diameter pushing tool than most commercial sets provide, with a diameter of around 2.5mm. This tool is very slightly oversized, allowing you to reliably fit a GMT hand to the NH34 movement.

Version 2 is 1.6mm. This works perfectly and avoids issues with pushing the GMT on too far. However, I found that my printer didn't manage the hole at all well and so I needed to drill it out with a 1.6mm hand drill.

Print Settings

Printer Brand:

Prusa

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>i3 MK2.5</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>0.2</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>15%</p></div></p>                                                    <strong>Filament:</strong> Prusa PETG                    <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>Should be fine in most filaments, but avoid anything abrasive.  If you can avoid printing the layers without sufficient cooling between that can help as, with the 1.6mm version the part can fail to create a bore when printed in PETG.  PLA may be better.</p></div>

Post-Printing

Finishing steps

            <div><p>This may need the hole drilling with a 1.6mm drill bit if printed on an FDM printer.</p></div>

How I Designed This

Built in Fusion.

NH34 GMT Hand press tool