From: muratlanne@gmail.com   
      
   "Clare Snyder"  wrote in message   
   news:i52c4k56pnnkastspvqkbdne5rcnu3aor0@4ax.com...   
      
   I use grade 5 or grade 8 bolts as feed stock, depending on required   
   strength and hardness. - or even grade 3 if that is all that is   
   required. I go by the head markings to know what I have - - -   
      
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   I do that too. Threaded rod couplers are also useful stock for custom parts.   
   Unlike iron pipe, the threads on brass pipe nipples usually run true to the   
   OD, as mandrels for modifying threaded fittings.   
      
   Rolled bolts' threads and shanks are never quite parallel so I buy high   
   strength bolts long enough to chuck the shank with the threads exposed and   
   turn the threads to the next smaller 5C collet size, and center-drill the   
   end. When reversed in the collet the shank usually runs true enough for high   
   strength, low accuracy projects like tractor parts. I also center-drill the   
   head, just in case it needs center support, and may face the bearing side of   
   the head truer than as-stamped or turn a locating step in it to center in   
   existing oversized or worn and rebored holes.   
      
   The currently pending bolt project is threading a 3/4-10 bolt shank to   
   3/4-16 to fit a female-threaded hitch ball, after I finish the hitch mount   
   for the garden tractor, after the carbide grinder stand is done and the SiC,   
   diamond and Al2O3 wheels redistributed to more appropriate grinders, with   
   shop-made center bushings as needed. This hitch manually swings up and down,   
   supported and adjusted by 5/8" threaded rod in the original too-low hitch   
   ball hole. The trailer was made for a snowmobile and needs a higher hitch   
   ball than for yard trailers.   
      
   Grades 5 and 8 can be turned and threaded at reduced speed with HSS lathe   
   bits.   
      
   While researching diamond grinding I found advise that dry grinding steel is   
   OK below 4500 surface feet per minute, above that use coolant. Perhaps   
   that's why Darex diamond wheels last.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)