What is the function of the snap ring inside the hub of a propeller that is mounted on a tapered or splined shaft?

What is the function of the snap ring inside the hub of a propeller that is mounted on a tapered or splined shaft?

• A. The snap ring allows the propeller to be pulled off of the shaft when the retaining nut is backed off.
• B. It seals lubrication.
• C. It acts as a brake.
• D. It locks the prop to prevent rotation

Answer: (A)

The snap ring is a retention device that keeps the propeller hub properly located on the tapered or splined shaft, while still allowing removal when service is needed. It sits inside the hub and engages a groove on the shaft so the hub stays on the shaft during operation, but once you back off the retaining nut, the hub can be pulled off as a unit. This provides a convenient, controlled way to remove the prop without damaging the taper or splines. It isn’t a seal, it doesn’t act as a brake, and it isn’t what locks rotation.

The snap ring is a retention device that keeps the propeller hub properly located on the tapered or splined shaft, while still allowing removal when service is needed. It sits inside the hub and engages a groove on the shaft so the hub stays on the shaft during operation, but once you back off the retaining nut, the hub can be pulled off as a unit. This provides a convenient, controlled way to remove the prop without damaging the taper or splines. It isn’t a seal, it doesn’t act as a brake, and it isn’t what locks rotation.