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Feb /Mar MW R-8 collet holder?

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  • Feb /Mar MW R-8 collet holder?

    I was reading the latest issue of MW where the author suggests boring out the collet holder .006 over size { The pilot Dia. page 9 second paragraph }.I Miked mine and they were right on .950. So, why bore thet much clearance ?I would think plus .001 minus nothing or am I wrong ? Chris
    Ypsilanti Michigan

  • #2
    Didn't see the article in question,but I have made several R-8 closers I think your right.+/-.001" would be the max I would use.

    You might take a mic and do a sampling of your collets to see if they are consistent thou,some of the 5-C stuff isn't to consistent between mfgs.Hope this helps.
    I just need one more tool,just one!

    Comment


    • #3
      They vary.

      I made a 3C closer, made it to Zagar specs.... Hardinge and S-B collets went in right, closed right, came out right (aside from the sprung ones from Sobel ).

      Got an import collet, would have needed a press to get it in , or out again.

      Then you get to decide if you want to call teh import one bad, or lap out to use it.
      1601

      Keep eye on ball.
      Hashim Khan

      Comment


      • #4
        Jters,

        sounds like maybe you lap or grind down the offending collet - if it isn't one of 50 by 64ths!

        Comment


        • #5
          <font face="Verdana, Arial" size="2">Originally posted by uute:
          Jters,

          sounds like maybe you lap or grind down the offending collet - if it isn't one of 50 by 64ths!
          </font>

          D'y know? I think I won't do that..........
          1601

          Keep eye on ball.
          Hashim Khan

          Comment

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