Corsair titan AIO mechanical iris and fan cooler

Meet the Mechanical Iris Pump Cap

 A five-leaf, snap-together cover that reveals a hidden fan and customizable RGB glow when you need it. It then seals into a sleek, decorative shell when idle—and when fully closed, the iris also dampens fan noise for whisper-quiet operation. The iris works independently—your RGB can shine through anytime(or be switched off), while the fan only appears once you twist to open for active cooling.

*It should fit the TITAN AIO pump, and you can even print just the iris 

mechanism alone if you’d rather keep things purely ornamental.*

Background & Why I Made This

When I saw the Corsair “Make It Yours” challenge, I knew a flat plate wouldn’t cut it. I wanted to push beyond a simple cosmetic cap and flex my mechanical design skills. Instead of another static cover, I set out to build something that actually moves, integrates lighting, makes use of the wasted space behind the pump cap, and gives you control over noise as well as airflow.

What It Does

This model features a five-petal iris that you twist to open or close. Your RGB ring sits behind the iris, glowing continuously (and independently of the fan). When your system heats up, fire up the fan, twist the iris open, and let airflow, light, and sound blend to cool your CPU in style. When things cool down—or you just want quiet—you can switch off the fan and give the iris a partial twist for a subtle peek, or a full twist to completely conceal the blades and muffle any residual noise behind a gorgeous, customizable faceplate. Each petal is split into support-friendly halves, and the included STEP file lets you swap in any logo or pattern on the iris leaves.

Files & Printing

When it comes to printing I’ve tried to make it as easy as possible to make. All STLs come pre-oriented for zero supports, minimal overhangs, and one-click slicing. Simply download the iris design or everything, drop them into your slicer, and hit print—no manual rotations or support settings needed. The included STEP file lets you open the iris in your CAD software to emboss any logo, pattern, or artwork on each petal. From model download to finished print, it’s a seamless, plug-and-play experience.

Supplies

You will also need Glue.

Assembly

Now onto the assembly—I've made this as user-friendly as possible, so no head-scratching or confusing steps. With just a few screws, a bit of glue, and clear visuals, you’ll have your iris mechanism snapping open and closed in no time.

(before we start)

if your printing the non electronics file, then you need to glue these 2 pieces (make sure everything is aligned correctly)

*this becomes your modified slider base*

Step 1: Install the Iris Leaves

Slide each iris leaf into its designated slot on the slider base, curved edges facing inward.

Insert the M3 screws through the slider base and leaves.

Step 2: Attach the Iris Handle

Align the handle over the center of the slider.

Secure it with the screws.

If the iris feels stiff, loosen the screw a touch until everything glides.

(*By this step your iris should be fully functioning*)

Step 3: Prepare the Fan & RGB Ring 

*(skip to step 6 if your not doing electronics)*

Carefully remove the fan motor and blade from its stock housing.

Make sure not to damage and break the motor’s pcb.

Step 4: Lock In the Electronics

Glue the RGB LED to the back and the fan onto the front

You can also add a button to turn the fan, LED, or both on (see next step)

Step 5: Tidy the Wiring

Attach the button into the hole.

Thread the wires through the bottom hole.

Then you can splice them to a usb, or straight to your motherboard.

Step 6: Final Cap Assembly

*(No electronics step: Glue the iris to the base)*

Glue the fan/RGB, Spacer, and the iris mechanism.

Apply glue where needed to lock the structure together.

Let everything cure, then proudly mount it to your TITAN AIO cooler.

Conclusion & Thanks

I hope you’ve enjoyed diving into this over-engineered iris pump cap as much as I enjoyed designing it—36 hours in Fusion 360 taught me more about kinematics and parametric tricks than I ever imagined.

A huge shout-out to Learn Everything About Design for their incredible iris-design tutorial. I couldn’t have cracked this mechanism without that video.

Thank you to Corsair and Printables for hosting such a fun, creativity-fueling challenge. Sadly, I do not have the TITAN AIO pump so if you decide to print and install this onto your TITAN AIO pump, I’d love to see your photos and hear how it works in your build—please share your results!