From: muratlanne@gmail.com   
      
   "Jim Wilkins"  wrote in message news:1043b3k$3hded$1@dont-email.me...   
      
   I'm having trouble analyzing to learn from this. What is the load direction   
   on the inner ring that your weld must resist?   
   ---------------------------------   
      
   More specifically I assume that if the inner ring bears weight the upper   
   weld could fail in tension (+shear?) across its throat area. The lower weld   
   might shear along the column so punch press math could apply, or to the   
   extent the fit is loose or the column can expand and the ring shrink the   
   shear could be along a shorter line angled toward the weld throat. Does that   
   make sense?   
      
   If the load is a mooring line I'd have to know how it's attached.   
      
   I have similar geometry in two recent projects, one a shop-made stainless   
   solar array thrust bearing with the ring retained in the tube by a circle of   
   screws, their inner ends turned smooth and loosely fitting in a groove in   
   the ring. The load on the cap passes through the races and balls to the ring   
   below, so the outer tube is only shielding.   
      
   The other is a thick sleeve with an integral ring inside threaded   
   internally. It adapts this to a non-HF floor jack.   
   https://www.harborfreight.com/steel-floor-jack-cross-beam-64051.html   
      
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