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   rec.crafts.metalworking      Metal working and metallurgy      215,319 messages   

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   Message 214,876 of 215,319   
   Jim Wilkins to All   
   Re: Lead pots   
   13 Oct 25 22:44:06   
   
   From: muratlanne@gmail.com   
      
   "David Billington"  wrote in message news:10cjatc$2b93d$1@dont-email.me...   
      
   Stratotherm crimps IIRC, I've used some for wiring in kilns with high   
   temperature wiring. I managed to get the correct crimpers 2nd hand off   
   ebay, the new price would make your eyes water. Any recommendations for   
   alternatives to the intended crimper.   
      
   -------------------------------   
      
   I snatch up used crimpers at flea markets and use whatever fits best. If   
   they have calibration specs they no longer meet, like pulling tight on a   
   certain size of drill bit shank, I shim under the dies. For home use a   
   perfect crimp that properly strain relieves the insulation isn't as   
   important as for a machine that will be jolted in the back of a   
   cross-country truck.   
      
   The old Stanley 84-203 crimps tight enough to pass a pull test on most   
   everything.   
   https://www.ebay.com/itm/226842087604   
      
   https://nepp.nasa.gov/files/27631/nstd87394a.pdf   
   Table 12-1 on p.54 gives the pass/fail limits.   
      
   "For those contact-conductor crimp connections not contained in Table 12-1,   
   the   
   tensile strength of the crimp connection shall be no less than 60 percent of   
   the tensile   
   strength of the wire. Reference the manufacturer’s datasheet for wire   
   tensile strength."   
      
   Straightening solid copper wire by pulling it past its yield point gives a   
   good feel for wire strength. I've seen the pull force test machine but never   
   anyone using it, an experienced tug by hand was enough.   
      
   At work the company bought the proper tools, which cost as if they were   
   hand-crafted by Swiss watchmakers.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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