Product Overview

This high-efficiency 9-blade 3D-printable fan impeller is designed for custom cooling shrouds, DIY electronics, and robotics. The 9-blade configuration maximizes static pressure and provides consistent, low-turbulence airflow while minimizing acoustic noise. The model features a precise 2.0 mm center bore, engineered to press-fit directly onto standard micro-motor shafts (such as N20, 130, or 180 DC motors).

Included Files

• .STL
• .3MF

3D Print Settings & Recommendations

• Material: PETG, ABS, or ASA are highly recommended for mechanical durability and heat resistance near warm motors. PLA+ is suitable for low-speed, ambient-temperature projects.
• Infill: 100% (Solid). A solid print is critical to maintain proper rotational balance and prevent vibrations at high RPMs.
• Layer Height: 0.12mm – 0.16mm. Fine layers ensure smooth aerodynamic curves on the blades and a highly accurate center hole.
• Supports: Required. If you are using the .STL file, apply Tree / Organic supports to cleanly support the overhanging blades. If using the .3MF file, optimal supports are already pre-configured.
• Orientation: Print flat with the center hub resting directly on the build plate for maximum structural symmetry.

Post-Processing Tip

Due to 3D printer material shrinkage, the 2mm hole may print slightly tight. If necessary, gently clear the bore with a 2.0mm drill bit or a hobby knife to achieve a perfect, snug press-fit onto your motor shaft.