10" Equipment in 19" Rack Adapter
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Allows you to fit 10" gear horizontally (rotated 90°), in a 19" rack.
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- Creative Commons — Public Domain
Allows you to fit 10U of 10" gear horizontally (rotated 90°), in 6U of a 19" rack.
Context
At the time of writing, only two prior implementations of this exist online - one cut from sheet metal (great choice, but expensive), and one 3D printed in two sections (poor; printed rack rails are too thick for rack studs or most cage nuts). Mine combines the benefits of each, with none of the downsides; real metal rack rails from Amazon with 3D printed adapters - cheap, thin, and strong.
The main design limitation here is that the plastic needs to be somewhat thick in order to be sturdy, unlike sheet metal. It is attached from behind the 19" rails rather than from the front - unlike the way it's normally done. This is due to the need for thickness, but it gives us the aesthetic benefit of having the slave 10" rails and its gear lining up flat with the master 19" rails :)
Compatibility
Compatible with both rack studs and cage nuts. Rack studs can be inserted in the correct orientation, or the wrong one as per the picture below (I'm too lazy to re-take the picture...), it will fit fine
Bill of Materials
4x M6 heat set inserts.
4x M6 nuts.
8x M6 bolts.
(Optional) 4x M6 washers, <11.5mm OD. Goes between the nut and the 3D printed adapter.
4x M6 washers, ~16mm OD. Recommended for the 19" side - it needs something to brace against since we are installing the adapter from behind, instead of the usual front install.
2x 10U rack rails, with holes on one side. I recommend the one shown below, others might work too. I'm not entirely sure if it follows a standard or not. Should be easy to drill some holes if not.
These are the rack rails I ordered:
HMF 66810-02 10 HE, 2 pieces
Print settings
Mirror the adapter in your slicer to get left and right parts.
Vertical perimeters: 100. This forces the slicer to generate a sort of continuous 100% infill. The parts are small, so the extra material is negligible, but the enhanced strength is well worth it.
Supports: Optional. Not really needed but you could do it for the bolt hole if you want.
I recommend PETG or PLA Pro.
SEO to help people find this model:
90 degree 10in 10inch to inside 19in 19inch rack adapter homelab minirack