From: muratlanne@gmail.com   
      
   "Snag"  wrote in message news:v5i7b1$2cc9v$1@dont-email.me...   
      
   On 6/26/2024 5:21 PM, Jim Wilkins wrote:   
   ...   
      
      The way this is made there's nowhere to add a spacer sleeve . I've   
   got a whole 40 bucks in this set of used rods o it's not a big deal if I   
   screw one up . I think shortening the rods is really the only way to   
   make this work . In case you aren't familiar with Mitutoyo depth mikes ,   
   the thimble is 2 pieces . The top half unscrews and the rod is dropped   
   thru the hollow lower half . The top half is then screwed on to clamp   
   and retain the rod . The top of the rod is threaded , the collar that is   
   the clamping surface has 2 tiny setscrews plus a lock nut on top .   
   There's enough threads that if I screw up and have to take a little more   
   off I can , up to maybe .060" . About the only way I can see ruining one   
   is to bend it . That's a tight hole it fits in .   
   --   
   Snag   
     It's great to be straight !   
   ---------------------------------------   
   OK, a photo of one shows a small knob which on a Starrett is where the rod   
   is inserted, and retained by the knob. Unlike the Mitutoyo the rod rotates   
   with the thimble. I don't know why the rod not rotating would be an   
   advantage, but they claim it as one.   
      
   I've found an inexpensive inside micrometer useful, to reach deeper and   
   match the curve better than calipers in a small hole, and not shift as   
   easily when taken out. It can be checked with a more precise outside mike. I   
   used it this morning to check the tapped hole for my sawmill blade tensioner   
   screw, which had seized. The threads stripped off the 1/2-20 threaded rod   
   but the tapped hole in hot rolled bar stock was only 0.005" over the tap   
   drill. The labels on that auction lot of 12" USS and SAE rod don't admit who   
   made it.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)