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27026Re: [GrizHFMinimill] RE: Collets vs End mill holders

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  • Malcolm Parker-Lisberg
    Jan 31, 2014
    • 0 Attachment
      Dom

      So end mill holder are for girls and wimps ;~)

      Malcolm

      I don't suffer from insanity I enjoy it!
      Mene, mene, tekel, upharsin
      The writing is on the wall.
      Ha-ktovet al ha-kir

      --------------------------------------------
      On Fri, 1/31/14, petersdw@... <petersdw@...> wrote:

      Subject: [GrizHFMinimill] RE: Collets vs End mill holders
      To: GrizHFMinimill@yahoogroups.com
      Date: Friday, January 31, 2014, 2:06 PM


       









      Advantage of the end mill holder:
       If you use a collet and don't get it quite
      tight enough the cutting forces due to the helical cutting
      edge can gradually pull the end mill out of the collet.
       That won't happen with an end mill holder.  I teach a
      short machine shop class for college physics majors at James
      Madison University in Virginia.  I recommend the end mill
      holders to the young ladies because they have a tendancy to
      not get the collets tight enough.
      Advantage
      of the collet:  1)
      Using the end mill holder reduces the nose to table distance
      (i.e. the maximum height of the piece you can work on) by
      about 2 inches (5 cm).2)
      You can make tool holding fixtures that all have the same
      holding diameter (sort of like I think Tormac uses).  Then
      you can switch from center drill to drill chuck to endmill
      without taking the collet out of the machine.
      Dorn









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