From: peter@tsto.co.uk   
      
   On 29/05/2024 20:07, Bob La Londe 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?   
      
   I gather that you don't do much very-high-precision work? If so then   
   6061 will be strong enough, and is easy to machine. As far as I can   
   tell, most of the ones you buy are 6061 or similar.   
      
   If it's going to be overly stressed then supersize it, but in most cases   
   I wouldn't bother.   
      
   Peter Fairbrother   
      
   --- SoupGate-Win32 v1.05   
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