From the Loftsmith Workshop

GC9A01 round screen mount for 120 / 140 mm PC fans

Gives a small round GC9A01 screen a place to live on top of a PC fan, so your temps or logo show right in the case. Four thin struts bolt to the fan's corner holes and hold the screen over the hub. Change the hole spacing and hub size to match your fan.

1 part · 13 g · 120 × 120 × 14 mm

by Loftsmith Workshop

White four-armed bracket with a round centre pad sitting on the corners of a black square PC fan
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No adjustable sizes

Ask for the sizes you want to tweak, e.g. “make the width adjustable”.

Change it in the Studio

Parts

  • fan screen bracket · PETG · Front (bezel) face down on the bed, feet and cable spine pointing up; no supports

    PETG because the inside of a PC case runs warm and PLA softens at about 55 °C. At the defaults it is 120 x 120 x 14.1 mm and fits a 180 mm bed. With the 140 mm option it is 139.5 mm square.

Print settings

Layer height
0.2 mm
Walls
3 walls, so the M2.5 screw bosses print solid: about 18 g and 30 min at 15 % infill.
Infill
15 %
Supports
None. The foot counterbores have 45-degree cone seats and the window has a 45-degree chamfer.
Notes
Print in PETG, front face down on a smooth or textured PEI plate. The front face is the visible side, so the plate's finish is the finish you see.

Hardware

  • GC9A01 1.28 in round display module · Defaults match a 40.4 x 37.5 mm board with a 32.4 mm visible display. Measure your board and set the Screen sliders (boards 36-48 mm, displays 26-33 mm, corners 0.5-12 mm).
  • 2 × M2.5 x 5 mm screw (pan or socket head) · Screw into the printed 2.2 mm holes beside the board. The heads overlap the board edge by 0.65 mm.
  • 4 × Case-fan screw, 10 mm or longer (the self-tapping kind supplied with fans) · One per foot: 3 if you choose 3 struts. They pass the 5.5 mm foot holes and bite 5.7 mm into the fan's corner holes.
  • Wires from the screen to your microcontroller · The groove is sized for a bundle about 3.2 mm across (an estimate for 7-8 thin wires).

Assembly

  1. Solder or plug the wires onto the screen module.
  2. With the bracket off the fan, drop the module into the cup from the back, display facing the round window.
  3. Drive the two M2.5 x 5 screws into the bosses on either side of the board until the heads just clamp the board edge. Don't overtighten into plastic.
  4. Press the wire bundle into the groove under the cable strut from the fan side. It turns toward the frame edge just before the corner foot.
  5. Hold the bracket on the fan's free face with the feet over the corner holes. Drive a fan screw through each foot from the front.

Good to know

  • Screen boards vary. Measure yours and set the board width, height, thickness, corner radius and display diameter sliders. The 4.5 mm default thickness is an estimate, not a sourced figure.
  • Each screw head overlaps the board edge by only 0.65 mm (0.35 mm if the board sits hard against one side). That is enough for a light screen board, but check that both heads actually bear on the board after fitting.
  • The fan's corner holes on the face you mount to must be free. If your case uses long screws through the whole fan, you need longer screws or another mount.
  • Hub sizes aren't standard. The hub slider only changes the covered-area figure and the preview, so measure your fan.
  • The 19 % covered-area figure is the share of the blade ring hidden behind the screen and struts, seen from the front. It is not an airflow or noise test.
  • The 140 mm and custom fan openings are estimated from the 120 mm frame margins. Check that nothing touches the blades before powering on.
  • If your module has a tall plug on the back, raise the gap slider until the plug clears the fan face.
  • Strength was only checked for a 10 N push on the screen. This is a display mount, not a handle.
I printed this Remix

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