Drilling brass with a missaligned pilot hole

[Bill C.]

I think I would purchase an endmill the size needed. Center cutting. Plunge down to relocate and finish. Center drill after the plunge if material left

If you use an end-mill make sure it is a center cutting. Nice propellers. Good luck with your project

 

[Tony Wells]

If the existing hole is a through hole, you don't need center cut. I think I'd take an 3/16" EM and plunge it, and then offset it and use it like a boring bar just to make sure it didn't get pushed off, then either drill the #7, or bore it to size. And I meant use the EM in a tool holder, not the tailstock, to offset it and use it as a boring bar. You should plunge it with the tailstock, but expect it to not totally correct the runout. Most, by far, but not all.

 

[kd4gij]

It looks like you are threading the prop.

Have a look at the banner for Keith's video intro

The prop and shaft are tapered

They have a doulble jam nut arrangement with cotter pin on the end to prevent loosening and losing the prop.

http://www.youtube.com/watch?v=kmeu_yHz9Gg

Yes props for full size boats are tapered and keyed. I make boat prop shafts. The op has RC model props witch screw on the shaft.