From: Snag_one@msn.com   
      
   On 9/20/2024 5:51 PM, Snag wrote:   
   >    I got the back plate finished for the 3 inch chuck and I'm a bit   
   > disappointed at my initial testing results . I've measured .015 runout   
   > on a piece of 1/2 inch stock that I'm pretty sure is straight . Might be   
   > the jaws since the chuck body indicates about .004 near the face . These   
   > are the inside step jaws and the clamping surface is not very long so   
   > that may be part of it . I'll be installing the outside step jaws   
   > tomorrow and checking them - it came with 2 sets of those , one which   
   > matches the chuck s/n and one that doesn't . The inside step set I have   
   > installed do not match numbers ... aaahhh , what should I expect for a   
   > $10 yard sale purchase !   
   >    Actually , it may be as simple as regrinding the mismatched jaw sets   
   > to match this chuck . I have a little time to play with it , got no   
   > "other people's projects" in the shop right now .   
      
      Further testing having been completed the chuck has runout with all 3   
   sets of jaws of around .007" . Chuck body is more like .002-.003 . A   
   known straight 1/2" rod is not pointing  straight with the ways ...   
   looks like it's time to set up the toolpost grinder .   
      So it looks like maybe a cheap chuck , though well made . Fit and   
   finish are good , everything fits as it should and the scroll moves   
   smoothly with all 3 pinions . Which brings me to a question - since   
   there's more than one pinion is it going to make any difference which   
   one I use ? Do I need to give 'em all 3 a twist when I mount a piece of   
   stock ?   
   --   
   Snag   
   Voting for Kamabla after Biden   
   is like changing your shirt because   
   you shit your pants .   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)