RE: Drill and tap AME prop screw hole to M4?
Thanks for the heads up Toad. I was afraid of that. Chucking up the crank in a lathe could damage the bearing surface also.
My problem lies with the M3 shouldered screws I can buy. They all have .118 (3MM) shoulders. I need a .125 shoulder to mount a octura .125 x .098 flexhex just like the screw that is supplied, but longer. I tried to thread a .125 steel rod only to wear out the die and break the .125 rod in less than 2" of work. I think I needed to turn the threaded area down to .118 before threading, but I dont see that happening with such small material.
Any Ideas anyone?