Looking for dual thread bolt with different sized ends

[Commander Kinsey]

Where can I get a dual thread bolt with different widths on each end? Like this, but a smaller thread on one end.

[newshound]

Never seen anything like that. Does the maximum diameter have to be that of the larger thread? If the size difference is large enough, then drill out the larger one using a lathe, tap to the smaller size, and fit studding.

If the size difference is small, turn down a bolt or length of larger studding and put a thread on that with a die.

[Commander Kinsey]

I came up with a better idea. I have a drain rod similar to this. Specifically the spiral sharp thing:

I placed a normal hex-ended bolt into it, then a socket bit that goes on my power drill. I now have a device for rapidly loosening clay soil.

[rbowman]

It would help to know the application.

I've seen them used in specialized applications like manifold studs.

[Commander Kinsey]

Ah, that's what I was looking for, but I thought of another way anyway. I have a drain rod similar to this. Specifically the spiral sharp thing:

I placed a normal hex-ended bolt into it, then a socket bit that goes on my power drill. I now have a device for rapidly loosening clay soil.

[wasbit]

The same seller does them in various metric sizes.

[Paul]

You can also make things on a thread cutting lathe.

To be able to use the shop in University, we had to take a short course on using all the machines. This item is a part of a larger project, and thread cutting is involved for this part.

[Picture]

The feature on the end, the flat bit, you would saw that off if wishing for a different end finish. That probably fit in some holder thingy on the lathe. The work needs to be supported on both ends, so the work doesn't deflect when the cutting tool presses against it.

Any machine shop worth its salt, should have a thread cutter.

There's more to cutting threads than what little I learned, but at least I had fun. And the item I made, still works.

The thread in this case, is done with a bladed cutting tool. And it takes multiple passes, to make the thread. Your thread isn't ready after just one pass.

Paul

[Commander Kinsey]

ROFL! This question was just removed from Quora for "disobeying policies" - didn't tell me which one. I'm guessing a link to an Ebay listing to explain what I'm after is called advertising?

[Snag]

Pre-war Harley 2 stud 3 speed trannies used a stepped mounting stud . Got a '39 and a '40 out case in the shed for a rebuild project . Not enough of the original bike left to call it a restoration .