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All files are already oriented for printing and need no supports; you may have to clean up some holes. Print the frame in ABS (or PLA with good ventilation), and the rails and washers in TPU. Everything except the longest braces fits a 240×240 mm bed.
| File | Qty | Material | Purpose |
|---|---|---|---|
foot-left.stl | 1 | ABS | Left wall of the PSU bay |
foot-right.stl | 1 | ABS | Middle wall (with holes for two 3 mm LEDs) |
hdd-rack.stl | 2 | ABS | Drive cages. Together the two hold 8 × 3.5″ drives (4 front, 4 rear) |
mb-mount-left.stl + mb-mount-right.stl | 1+1 | ABS | Motherboard plate, joined with a lap joint |
psu-bracket.stl | 1 | ABS | Frame with the ATX hole pattern that the PSU screws to |
psu-support.stl | 1 | ABS | Bar the PSU rests on |
rear-brace-long.stl | 1 | ABS | Lower rear brace, 330 mm. Needs a bed of at least 330 mm; alternative: rear-brace-medium (228 mm) + rear-brace-short |
front-brace-with-fanmount.stl | 1 | ABS | Lower front brace that also serves as the lower fan mount |
fanmount-top.stl | 1 | ABS | Upper mount for the 140 mm fan |
hdd-rail.stl | 8 | TPU | Vibration-damping rail, one per drive |
washer.stl | 4 | TPU | Fan washers |
| File | When to use |
|---|---|
rear-brace-long-with-fanmount.stl (340 mm) | Second 140 mm fan at the rear. Replaces rear-brace-long; add a second fanmount-top |
rear-brace-medium-with-fanmount.stl | Rear fan without the long brace; connects the middle wall to both cages |
rear-brace-medium.stl / rear-brace-short.stl | Shorter rear braces when 330 mm does not fit your print bed |
fanmount-bottom.stl | Lower fan mount on its own, without a brace |
| Item | Qty | Where |
|---|---|---|
| M3 heat-set inserts (Ø4 hole) | ≈30 | Top edges of the walls and cages, front/rear near the bottom, PSU frame and bar, 7 motherboard standoffs |
| M3 socket head screws, 8–10 mm | 23 | Joining the printed parts |
| M3 × 6 mm screws | 7 | Motherboard to standoffs |
| M4 inserts + M4 × ~30 mm screws | 4+4 | Fan (Ø5 holes in the mounts). The author recommends M4, but regular fan screws also work |
| Drive screws 6-32 UNC | 40 | 24 for the rails (3 per drive) and 16 through the cages (2 per drive) |
| PSU screws 6-32 UNC | 4 | PSU to psu-bracket |
| 140 mm fan | 1–2 | Front of the drive bay (optionally also the rear) |
| 3 mm LED | 2 | Power and HDD, optional |
| Rubber feet | 8 | Under the walls (instead of printed feet) |
The author (Oskari Nykänen, CC BY-NC-SA 4.0 license) did not publish assembly instructions. I reconstructed the layout from the geometry of the STL files: hole spacings match between parts to the millimetre (e.g. plate holes at 31.5/205.5 mm, the ATX PSU pattern 114/138/64.5 mm, the 3.5″ drive side holes 60/41.6 mm). This also agrees with the author's note that you have to remove the fan to reach the drive screws, and the fan mount too for the lowest drive. Two things are less certain. The number of hdd-rack parts (2) follows from the four rows of holes in the plate and in the long brace. The order of the steps is my suggestion.