From: muratlanne@gmail.com   
      
   "Snag"  wrote in message news:v5hnnl$29e1b$1@dont-email.me...   
      
      I scored a Mitutoyo unit a while back at a yard sale . It only had   
   one rod , 0-1" and I wanted more ... so I bought some on eBay . Thing is   
   they must be for a different model micrometer , they're all 5/8" too   
   long . And not 1-2 , 2-3 , etc . So I was thinking that I can cut them   
   off to measure correctly in my unit . This will give me 0- 5" if I cut   
   them to the appropriate lengths . It looks like I won't have to be   
   absolutely on the mark since there is a calibration adjustment on each   
   rod . I'm thinking that my Dremel in the toolpost clamp and a cutoff   
   wheel , then a light polish with a fine grinding wheel also using the   
   dremel . I have 123 blocks that I can set up to calibrate - maybe not as   
   precise as a metrology lab , but I think close enough for what I do .   
      Does this sound doable , and any suggestions ?   
   Snag   
      
   -----------------------------------   
      
   How about making a 5/8" long adapter sleeve for the head end, with   
   appropriate threaded ends?   
      
   If you set the lathe compound 6 degrees off square each 0.001" division on   
   the dial will move the bit 0.0001" sideways.   
      
   The mike will read the zero error and corrections will be to the one DIY   
   sleeve, not all the rods. A screwup will cost you only the sleeve.   
      
   The biggest problem may be matching the threads. You need to match only the   
   mike end, you can make the cap.   
      
   My depth mike is a Starrett so measuring its thread won't help you.   
      
   When I set my South Bend up for metric threading I found that the standard   
   100/127 gear set wouldn't give me the fine lens threads I wanted, 120/127   
   gave more. I used a spreadsheet to calculate and tabulate the inch - metric   
   equivalence of several possible choices. Change gears were much cheaper in   
   the early 90's. They weren't a direct fit, I had to make a bearing adapter.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)