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  1. 02-05-2014 #9
    Jonathan's Avatar
    Lives in Leicester (Home) or Nottingham University (2nd Home), United Kingdom.
    Jonathan
    Last Activity: 05-04-2020 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 3,571. Received thanks 325 times, giving thanks to others 8 times. Referred 1 members to the community.
    You could maybe use a grade of steel that's easy to harden, machine it to just under the diameter you need on a lathe, knurl it, then harden it.
    Click image for larger version.  Name: Knurling_closeup.jpg  Views: 303  Size: 664.5 KB  ID: 12320

    That's pretty close to a file. You could mill/grind some flutes so the swarf has somewhere to go.
    Last edited by Jonathan; 02-05-2014 at 09:41 PM.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.
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