From: none@none.com99   
      
   On 5/31/2024 8:53 AM, Peter Fairbrother wrote:   
   > 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   
      
      
   Compared to the what guys brag about doing with their machine... er I   
   mean their boss's ... er I mean their boss's bank's million dollar   
   machines in multi million dollar environmentally controlled laboratory   
   clean rooms.  No.   
      
   I do keep a couple to a few thousandths tolerance all day with my cheap   
   machines, and for the types of work I do acceleration is huge in   
   productivity.  A change of a few iss acceleration can save hours per day   
   when you are doing iterative short 3D machine passes.   
      
      
   --   
   Bob La Londe   
   CNC Molds N Stuff   
      
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)