Maddie Hardware · Case

2020 Rail Adapter

3D-printed parts that turn 2020 aluminium extrusion into Eurorack rails. The adapter slides into the extrusion slot and holds a Eurorack threaded strip in a captive channel.

2020 Rail Adapter board render
2020 Rail Adapter board render
Type
3D print (OpenSCAD)
Fits
2020 extrusion, tapered T-slot
Holds
Eurorack threaded strip, or M2.5/M3 T-nuts
Length
Set by a parameter
Source Files

Overview

These parts let you build a Eurorack case from 2020 aluminium extrusion. The adapter slides in from the end of the extrusion. A T-shaped tab fits the tapered slot, and two side walls wrap the extrusion so the adapter does not rock. The top has a captive channel for a Eurorack threaded strip, or for a row of M2.5 or M3 T-nuts of the same size.

Parts

File Part
2020-adapter.scad One strip channel (first image)
2020-adapter-dual-strip.scad Two strip channels, one on each side (second image)
2020-large-channel.scad One wide channel across the full top
rail-riser.3mf Rail riser, ready to print

All .scad files are parametric. Change the values at the top of the file in the OpenSCAD Customizer. Set length for your rail. For reference, 84 HP is 128.5 mm and 104 HP is 158.75 mm. If your printer bed is too small, print the rail in shorter parts.

Printing

  • For the most accurate slot and tab, stand the part on one end, with the cross-section facing up.
  • You can also print it on its back face. The lips of the strip channel overhang by about 1 mm and bridge without supports.
  • If the fit is too tight, increase tab_clearance.

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