Stewart Warner Horn Shaft Repair

[Kevin in NJ]

I was sorting through my selection of horns. I decided to tackle fixing the SW armature I broke the screw off of trying to turn it the wrong way many years ago.

I found the outer diameter of the armature chucked up accurately. Well .004" should be good enough for this fix. I faced, drilled and tapped it 6-32. So now I had hole to screw my fix into.
I did some left hand tread practice and did ok. So I made a shaft normal 6-32 at one side and 8-32 left thread on the other. It is turning out better then I expected.

Still need to drip for a cross pin. The I will thread lock the 6-32 into the hole after trimming 8-32 to the correct length.


I have added a picture of the finished piece.
Would you believe that was my first try at threading on a lathe?
Way easier then I thought it would be to do.

Now I am on to electrolytic rust removal on the other parts.