From: none@none.com99   
      
   On 2/8/2025 5:56 AM, Snag wrote:   
   > On 2/8/2025 12:06 AM, Richard Smith wrote:   
   >> Hi all   
   >>   
   >> Working with   
   >> Rectangular Hollow Sections   
   >> Square Hollow Sections   
   >> box sections   
   >> ...   
   >>   
   >> The rounded corners make using an adjustable square / sliding square   
   >> problematic.   
   >>   
   >> Given number of machine parts I have to make quite accurately based on   
   >> SHS's, thinking of a tool specially optimised for marking distances   
   >> from the surfaces.   
   >> ie. whatever presents as "top", slide along marking down the "sides".   
   >> Typically the middle of the "sides".   
   >>   
   >> Accuracy - well using a chalk / soapstone is plenty good enough.   
   >> Have to bring magnetic-base drill to the job most of the time, and   
   >> with using a shell-cutter / trepanning cutter with a central "pin" to   
   >> locate on the centre-pop - accuracy there is less than chalking gives.   
   >> So - would hold thing in place and chalk-mark.   
   >>   
   >> I could trim offcuts of angle-iron to make single-dimension tools -   
   >> eg. marks 25mm from "top" surface.   
   >> Advantage with this or "settable" tool is spin around 180deg and mark   
   >> the other "side" and the two heights/levels should match-up.   
   >>   
   >> Hope described this well enough.   
   >>   
   >> Best wishes   
   >>   
   >   
   >    I've seen combination squares with a wide flange on the head that   
   > will do what you want . Here's a link to one on Amazon , kinda pricey   
   > but you might be able to find one cheaper .   
   >   
   > https://primeweld.com/products/lagesse-products-lasquare-12-combination-   
   > square-stainless-steel-blade-aluminum-square-head   
      
      
   Exactly what I was thinking of.  Might even be able to swap out to a   
   longer scale if needed.  I had (maybe still have somewhere) a   
   combination square with an 18 inch scale.   
      
   --   
   Bob La Londe   
   CNC Molds N Stuff   
      
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