55mm (2.2 Inch) Blade Propeller for Coreless Motors

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.