MGN12 rail M3 to M4 adapter
thingiverse
This piece eliminates vibrations caused by MGN12 rails on an aluminum extrusion thereby reducing sound levels. It also eliminates the need for M3 T-nuts as the screw holes on both sides are M4 sized. Every detail is precisely modeled with 0.075mm tolerances. EDIT: A selection of raised end-stop mounts has been added to accommodate the increased height of the carriage. Simply choose the one that best suits your setup.
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