Step 4: Attach the drive rod to the Sharpener
Find a die that will fit over the piece of the shaft on the back of the blades where the handle goes and thread it. I believe I used a 5/16-20 die.
Now the tricky part- weld the drive rod to the nut that will thread on to the blades. My first attempt was off-center so the pencil sharpener shook pretty bad. The second attempt went much better- I found a nut that just barely fit over the drive rod and welded it together with about 1/8" of the rod sticking out. Then I welded the correct nut to the nut and rod. MUCH better!