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3-Blade Fan for 775 DC Motor

Component	Specification
Blade Count	3-Blade Aerofoil Design
Material	High-Impact Reinforced Plastic
Bore Diameter	4.95 mm (Tight press-fit for 5mm shaft)
Fan Diameter	Approx. 80mm to 100mm
Compatibility	RS-775, RS-795, and RS-755 Motors
Weight	Approx. 12g
Direction	Standard CW/CCW (Reversible)

Price

🚚 Ships within 24 Hours
📦 Pan India Delivery

₹ 25.42

(Tax included)

Barcode: 59301294

Product Description This high-torque 3-blade propeller is specifically engineered for use with 700-series DC motors, such as the powerful RS-775. Featuring a precision 5mm bore, it provides a secure friction fit that can withstand the high RPM and vibration typical of industrial-grade motors. The wide-surface blades are optimized for maximum air displacement, making this fan an excellent choice for DIY air purifiers, high-power cooling systems, or custom-built desktop fans and science models.

Key Features

Large blade surface area designed for high-volume airflow.
Reinforced center hub to prevent cracking under high rotational stress.
Precision 5mm press-fit bore ensures stability without the need for set screws.
Lightweight aerodynamic design reduces load on the motor for better efficiency.
Durable plastic construction resistant to impact and continuous high-speed use.

Technical Details

Shaft Compatibility: Optimized for 5.0mm shafts (actual bore ~4.95mm).
Propeller Diameter: ~90mm (Tip to Tip).
Hub Thickness: 12mm.
RPM Limit: Rated for up to 20,000 RPM.
Airflow Pattern: Concentrated axial flow.
Material Property: Static-resistant, heat-stable ABS/Nylon blend.

Prototyping and Engineering Tips from Robogears

Installation: Since 775 motors generate significant force, ensure the motor is securely mounted in a bracket before attaching the fan. To install the fan, place the back of the motor shaft against a solid surface and press the fan on firmly to avoid damaging the motor's internal brush assembly.
Vibration Management: At 10,000+ RPM, even a slight imbalance can cause severe vibration. If you experience shaking, ensure the fan is pushed all the way down and perfectly perpendicular to the shaft.
Safety Housing: Because 775 motors are exceptionally powerful, we strongly recommend building a wire mesh or plastic guard around the blades. At high speeds, these blades can cause injury or break if they strike an object.
Thrust vs. Cooling: If using this to cool the motor itself, ensure the airflow is directed over the motor casing or through the motor's internal ventilation holes to maximize heat dissipation during heavy-duty tasks.

Package Includes

1 x 3-Blade Propeller for 775 DC Motor

Disclaimer Product images are for illustrative purposes; actual color or appearance may vary by batch. Specifications are subject to change by manufacturer. Handle high-speed rotating parts with extreme caution; adult supervision required for DIY projects.