In the construction of my leg vice, by the grace of the cosmos I came into possession of this huge wood screw.  I estimate it to be about 100 years old; it looks like it's seen enough action to have earned a few purple hearts and a postgraduate degree.  But the requisite nut, that component needed to turn rotational force into amplified lateral force, was nowhere to be found.  I had the option of making the complimentary nut on a wood lathe, but I also have access to a CNC router.  I could machine a nut to precise dimensions and, if I'm careful, I can do it right the first time, wasting no wood.  
  "Pass me the calipers" I said.

 I make all my wood nuts at TechShop.

Step 1: You Will Need

  • Calipers
  • 3D modeling program (I used Autodesk Inventor)
  • a CNC router (I used a ShopBot)
  • 1/8" router bit (ballnose)
  • 1/2" router bit (I don't care what shape, whatever makes you comfortable)
  • Wood glue
  • Basic woodworking tools

I have opted to use poplar wood for this project.  Though it is a bit softer than maple (the typical wood of choice for threaded parts) the  very coarse threads with a 2" diameter make for a robust shape that requires minimal edge-holding properties.  
Do you have the autodesk file for the threads saved and would you share it?
Impressive, congratulations.
cool, where did you get the wood screw?
The Pakistani black maket. Just kidding. eBay. Definitely not the Pakistani black market.

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