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NNTP-Posting-Date: Wed, 29 May 2024 21:00:46 +0000
From: Joe Gwinn <joegwinn@comcast.net>
Newsgroups: rec.crafts.metalworking
Subject: Re: Material Choice
Date: Wed, 29 May 2024 17:00:45 -0400
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On Wed, 29 May 2024 12:07:36 -0700, Bob La Londe <none@none.com99>
wrote:

>I need to make a mounting adapter for the the ballscrew I plan to use on 
>the Y axis of the Hurco mill.  On hand I have oodles (not quite a crap 
>ton) of 6061, a little bit of MIC6, a little ATP 5, some 7075 (bought 
>for a "special" project), and a decent amount of 4140HT not reserved for 
>anything.
>
>The 7075 would likely be the best of the aluminum alloys.  Its the 
>strongest, but like I said.  I bought it for a "special" project.
>
>The strongest by a lot would be the 4140HT, but it has its issues.  Its 
>tough to machine, but I can do it.   It would have the least flex, or 
>compression, but it can warp during machining.  I do have a toy surface 
>grinder, but it has no coolant setup.  I have no desire to warp it even 
>more trying it grind it flat after machining.
>
>In between would be cast iron (very expensive) and mild steel (likely 
>1018) of which I have neither on hand suitable for this adapter.
>
>For context, the adapter will bolt onto the location where the old ball 
>nut was, and the new ball nut will bolt on to it.  It doesn't have to be 
>absolutely perfect, but it does need to be "pretty good."
>
>Ideas?  Suggestions?  Warnings?

 A sketch of the desired adapter plate would help.

I would use and design for 6061, and only if that cannot work, worry
about other materials, and the reason that 6061 flunked will be
informative.

Joe Gwinn