Dual 120mm Fan Door Mount for Server Cabinet (Split Design)

A low-profile, modular mount for two 120mm fans (specifically designed for AC Infinity Multifan S3-P / S7-P) to create active airflow in a server cupboard or AV cabinet.

Designed to fit on a standard 210x210mm build plate (like the Prusa MK3/MK4) by splitting the housing into two interlocking halves.

Key Features:

• Split Design: The model is split in half to fit on standard print beds (Prusa MK3/MK4/Ender 3) without needing a massive industrial printer.

• Zero Supports: Designed to print face-down with no support material required.

• Integrated Flange: Features a sturdy 20mm mounting flange for securing to wood/MDF doors.

• Hidden Cutout: The faceplate overlaps the door cutout by ~2.5mm on all sides to hide rough saw cuts.

Why Split? A dual 120mm mount with flanges exceeds the 250mm width limit of many printers. This design prints as a single "half-module." You print it twice, rotate the second one 180°, and they meet in the middle to form a solid unit.

Print Instructions

• Rafts: No

• Supports: No (Orient face-down)

• Resolution: 0.20mm (Structural)

• Infill: 15% - 20% Grid or Gyroid

• Filament: PLA is fine for most intakes. Use PETG if exhausting hot air (>40°C).

• Notes: You must print this file twice. In your slicer, rotate the second instance 180° so the open ends face each other.

Hardware

• 2x 120mm Fans (Designed for AC Infinity Multifan S3-P / S7-P, but standard PC fans fit).

• 8x M4 Bolts + Nuts (approx 35mm length) to secure fans to the printed housing.

• 10x Wood Screws (No. 8 or similar flat head) for mounting to the door.

Installation Guide

1. Cut the Door: Cut a rectangular hole in your cabinet door approx 115mm (W) x 235mm (H).

2. Assemble: Bolt the two fans into the two printed halves. The fans themselves act as the bridge that holds the two printed parts together stiffly.

3. Mount: Insert the assembly into the hole and screw the flanges into the door.