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uv_halo 03-26-2013 08:24 PM

Threading and Wall Thickness
 
Is there an internal thread that can be applied to a 2.0" O.D. x .065" I.D. x 1.87" I.D.?

I've been trying to get the answer to this question and it's been confusing. If it matters, the material is 6061 Aluminum.

desertT1 03-26-2013 08:30 PM

If you single point it, you can make whatever you want. 1.90-14 would give you ~.030 wall thickness and that much in threads too. TPI can be whatever you want. I've seen several taps larger than 1" use 14 TPI, so that's fairly safe IMO.

Since I'm guessing this goes towards a raincover, you could make a doughnut and drill/tap that at 90* angles and anchor it in that way.

uv_halo 03-26-2013 08:50 PM

Quote:

Originally Posted by desertT1 (Post 2665999)
If you single point it, you can make whatever you want. 1.90-14 would give you ~.030 wall thickness and that much in threads too. TPI can be whatever you want. I've seen several taps larger than 1" use 14 TPI, so that's fairly safe IMO.

Since I'm guessing this goes towards a raincover, you could make a doughnut and drill/tap that at 90* angles and anchor it in that way.

I'm not sure by what you mean by "single point it" but, if I were to tell the machinist 1.90-14, he'd be able to do it with no special tooling requirements, or extended setup times?

Skibbo 03-26-2013 09:20 PM

Quote:

Originally Posted by uv_halo (Post 2666019)
I'm not sure by what you mean by "single point it" but, if I were to tell the machinist 1.90-14, he'd be able to do it with no special tooling requirements, or extended setup times?

single point = lathe, otherwise it'd be done with a tap. I don't see why any special machinery would be required if he's a competent machinist.

uv_halo 03-26-2013 09:55 PM

Quote:

Originally Posted by Skibbo (Post 2666044)
single point = lathe, otherwise it'd be done with a tap. I don't see why any special machinery would be required if he's a competent machinist.

Thanks for clearing that up. I imagined that would be the case but, there was a time when I needed to have a metric lens thread cut and, he quoted it out to be prohibitively expensive to cut such a thread.


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