Long crank pins

[nachoman]

I see now. I wonder if they make small dies to turn threads on the outside of a rod... What size screw are you using? 2-56? I basically drilled a hole in the counterweight, inserted the appropriate size brass tube, and then tapped the inside of the tube for a 00-90 screw. That may not work for you if you are using a larger screw, because the wall thickness of the brass tubing may not be thick enough to allow for the threads on a larger screw.

Edit - I just looked, and K&S makes a 2-56 die. You could use a brass rod, drill out the driver, and press/epoxy the rod in. Then thread the outside of the rod, and attatch the mainshaft with a 2-56 nut.