1-4U rack blanking plates, 2 mounting options
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I needed rack blanking plates and decided to design my own, with the 256mm build plate in mind.
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I needed 19" rack blanking plates, and wanted something with flush front and easy to install even without using cage nuts and bolts, so here is what I ended up making. The plates have 2 methods of mounting into the rack - via printed clips, or via regular cage nuts, and two methods of joining the 2 halves - with m3 screws or glue. M3 screws are self tapping into the printed holes, no inserts needed to hold reliably in PLA or PETG.
The blanking plates themselves are rotationally symmetric and every unit requires 2 plates. 1U and 2U plates can be printed as a complete set on a single build plate, larger sizes need 2 plates due to larger area of the plates (unless you have a larger print bed, in which case, you win :).
The plates that mount with sliding m3 locking tabs are great for mounting as a single self contained unit, and they are suitable for any position in the rack.
To mount the m3 style plate you:
screw the 4 locking tabs on the back side of every locking location, in an orientation such that the notch faces inward, and the locking tab is gently tightened in the unlocked (outward) position
clip the plate into position
loosen the screws a bit, pull inward and tighten again.
The plates are completely self contained and easy to install and reuse.
Glue versions contain locating pins and holes to aid in alignment. I would suggest putting a narrow strip of sticky tape on the seam of the glue up to both locate the parts and prevent glue from spilling through the seam (and bleeding through to the front face and marring it), then simply gluing the connecting plate on top with some weight on top to ensure a proper bond.
Files provided are grouped by the combinations of the mounting and joining options, naming means size+mounting method+joining method. For m3 mounting method you also need to print out one Lock m3 file (contains 4 connected small locking tabs) and for glue joining method you need one glue plate.
a bit of warning - test the m3 plates fit in your rack, they are a close fit so you might need to extend or shorten them a smidge, same goes for the locking tabs, make sure the notch is a bit shallower than the rack post is thick, to ensure a good clamping force ;)
Fusion file available on request, but it is a messy one, so I am not comfortable publishing it along with the models ;)