Dell Optiplex 1 or 2 x 3.5 to 5.25 bay caddy tray cage
thingiverse
This is compatible with Dell Optiplex Tower systems. I tested this model in a Dell Optiplex 7050 Tower, and the printed parts had an excellent fit. Here is a short list of Dell Optiplex Tower models I think are compatible: Optiplex 3040, Optiplex 3046, Optiplex 5040, Optiplex 7040 Optiplex 3050, Optiplex 5050, Optiplex 7050 Optiplex 3060, Optiplex 5060, Optiplex 7060, Optiplex 3070, Optiplex 5070, Optiplex 7070 There are likely other dell systems that support this model. You will need 3 x M3x6mm screws (min 6 mm, but any length should work) in addition to 8 x M3x6mm screws which are used to mount the drives (countersunk screws are appropriate). 1 screw on the regular part and 2 screws on the mirrorred part which is required for the locking mechanism and balanced fit. I tested the fit with 20mm HDDs Seagate Barracuda 2TBs. It perfectly fits to the 5.25" bay with small spaces on each side and in the middle.
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