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  • #16
    Originally posted by Edwin Dirnbeck View Post
    I don't understand. I have never seen a screw and nut that would work by hand but wouldnt work by motor. I assume that you are NOT trying to raise and lower at super high speed,but only at a speed that is reasonable. Maybe you chose a screw that is too small for the load.If you can crank it up quickly by hand,then it should work by motor,the screw doesnt know what is turning it. Edwin Dirnbeck
    On the website they write that the steel nuts are not suitable to be used in a motor driven situation. Or more correctly they are not suitable with a steel on steel situation.
    Location: The Black Forest in Germany

    How to become a millionaire: Start out with 10 million and take up machining as a hobby!

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    • #17
      Originally posted by Doozer View Post
      Where is the specifications for your, "self-centering version"?

      -D
      Originally posted by Doozer View Post
      Are you talking about ANSI General Purpose Acme Thread Form ASME/ANSI B1.5-1997,
      and Stub Acme Screw Thread Form ASME/ANSI B1.8-1988 ?

      -D
      Machinery's handbook references ANSI B1.5-1973 with fit classes of 2C, 3C, 4C, 5C and 6C.
      Location- Rugby, Warwickshire. UK

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