Hello Everyone
OK...I have a Supertigre .40 with 1/4 shaft. I am working on my 4th prop and still can't get this right.

When I place the spinner back-plate on the shaft, there seems to still be about an 1/8th of the unthreaded portion of the shaft exposed between the back-plate and where the threads start. I am using a Zinger Wood prop and the problem is that the prop fits very snug up to the point where this shaft is unthreaded. This is as far as it will go unless I ream a portion out to make the prop fit snug against the backplate.

Should I ream the prop out by the 1/8th inch to allow it to fit snug against the back plate??

I am afraid if I try and force it on the larger portion that I will break the prop.

Any help would be appreciated.

Also had the same issue with Master Airscrew props.

Thanks,
Lamar