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How To Hold Small Parts?

Discussion in 'A BEGINNER'S FORUM (Learn How To Machine Here!)' started by kyler, Jan 4, 2017.

  1. kyler

    kyler United States Active User Active Member

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    I'm making handlebar risers. They are 25mm long and 25mm OD with a 10.5mm hole. I made a mistake and didn't turn them to the final size before parting.

    How do I mount these so I can turn them down to 25MM? Is there some sort of expanding bolt?
     
  2. DaveInMi

    DaveInMi United States Steel Registered Member

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    There are different designs of arbors you can make. One uses a pipe plug (tapered threads) and split the shaft with a hacksaw or whatever.
     
  3. Wreck™Wreck

    Wreck™Wreck United States Active User H-M Supporter-Premium

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    Inside or outside turning?

    If outside make an arbor and bolt them to it then turn away.

    If inside hold them in a chuck and bore to your hearts content.
     
  4. kyler

    kyler United States Active User Active Member

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    outside. Is there a discussion on the forums about making an arbor? or perhaps a video someplace?
     
  5. kd4gij

    kd4gij United States Active User Active Member

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    Just grab a piece 3/4 of round stock or what ever you have chuck in lathe turn it down to a interference fit for the 10.5 id a little less than the 25mm length
    drill and tap to m6 and tap your part on and tighten with a washer. leave the arbor in the chuck till you get both parts turned down.
     
    Ulma Doctor, brino and JimDawson like this.
  6. kyler

    kyler United States Active User Active Member

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    perfect - thanks!
     

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