55mm (2.2 Inch) Blade Propeller for Coreless Motors

Specification	Details
Diameter	55 mm (approx. 2.2 Inches)
Bore/Hole Diameter	0.95 mm (Press-fit for 1mm shafts)
Material	High-Elasticity ABS / PC Plastic
Weight	~0.3g per blade
Compatibility	615, 720, 8520 Coreless Motors
Rotation	CW and CCW Variants

Price

₹ 55.08

(Tax included)

Barcode: 59301105

Product Description

The 55mm Blade Propeller is an ultra-lightweight aerodynamic component specifically designed for micro-drones and DIY indoor quadcopters. Engineered to fit the 1mm output shafts found on standard brushed coreless motors (such as the 6x15mm, 7x20mm, and 85x20mm series), these propellers provide high lift-to-weight efficiency. The flexible plastic construction ensures that the blades can survive repeated indoor crashes against walls or furniture without snapping or causing damage. Whether you are building a "Tiny Whoop" style racing drone or a simple science project, these 55mm props offer the stability and thrust required for agile micro-flight.

Key Features

Precision Press-Fit: The 0.95mm center hole ensures a tight, friction-based grip on 1mm motor shafts, eliminating the need for glue or set screws.
High-Flexibility Material: Made from specialized ABS/PC blends that absorb impact energy, making them extremely "crash-friendly" for beginners.
Optimized Airfoil: The blade profile is tuned for the high-RPM characteristics of brushed coreless motors, providing a smooth hover and responsive punch-outs.
Ultra-Lightweight: At only 0.3g, these propellers minimize the rotational inertia, allowing the motors to change speed almost instantly for better flight stabilization.
Color-Coded Options: Often available in various colors to help pilots distinguish the "Front" from the "Rear" of the drone during line-of-sight flight.

Technical Details

Blade Count: 2-Blade (Dual-blade) design.
Pitch: Fixed pitch optimized for micro-thrust.
Center Hub Thickness: ~5mm.

Prototyping and Engineering Tips from Robogears

Motor Matching: While these fit 615 motors, they perform best on 720 or 8520 coreless motors. The larger motors have the torque required to spin a 55mm blade efficiently. Using them on a 615 motor may cause the motor to run hot and reduce its lifespan.
The "Clockwise" Rule: CRITICAL: Propellers are not interchangeable. CW (Clockwise) and CCW (Counter-Clockwise) props must be placed on the correct motors. If your drone flips over or won't take off despite the motors spinning, you likely have the props swapped or installed upside down.
Shaft Cleaning: Before pushing the prop onto a new motor, ensure the shaft is clean. If the prop feels too loose, a tiny drop of "Threadlocker" (not superglue) can help, but be careful not to let any liquid enter the motor casing.
Removing Propellers: Do not pull the propeller by the tips of the blades, as this can bend the motor shaft or pull the shaft out of the motor. Use a Propeller Removal Tool or a small pair of tweezers to pry from the center hub.
Jello-Effect Fix: If your micro-camera video looks shaky (Jello effect), check for tiny nicks or "stress whitening" on the propeller edges. Even a microscopic bend in these small blades can cause high-frequency vibrations.

Package Includes

1 x 55mm Blade Propeller (Specify CW or CCW)

Disclaimer: Always remove propellers when configuring your flight controller (Betaflight/Silverware) via USB to prevent accidental take-off. Keep hair and eyes away from spinning micro-props, as they rotate at very high speeds (up to 40,000 RPM). Inspect for cracks after every crash; a cracked hub can fly off the motor during flight.