ORIGINAL: cal.45acp
I think I like the CH type prop adapter, steel to steel threads less chance of stripping out, I have a couple of ryobis that I am using weed whacker prop adapters on ( all aluminium) and they work just fine , but one has to be careful to not over tighten hub for fear of stripping aluminim threads
Speaking of stripping threads. I still don't understand how you guys tighten your prop by screwing steel machine screw into threaded aluminium hub. When I have to tighten the wooden prop on the shaft I use all my power otherwise it will slip.
The hubs I made have steel machine screw that is mounted permamently on to the hub. Then I use steel nut for tightening the prop. Steel to steel, and I don't have a problem with thread. The obly drawback is that the hole in the prop must be 12mm
Here is my prop adapter (without taper, as this one was mounted to the flywheel)