Step 4: Make the Rotor Shaft
-Shave the middle part of the shaft that will be between the bearings down to 1/4" to take off some weight. Then drill a 1/4 inch diameter hole about 1 inch deep into the end of the shaft in the front.
-Put the rest of the 1/2 inch diameter steel rod in the lathe and take a 3/4 inch long section at the end of it down to just under 1/4 inch in diameter. This will be a pin to slide into the hole in the front of the shaft. Then cut the rod off 2 inches behind the pin you just made and smooth off the end. If you are using an electric starter, drill a hole into the end of this piece that will accept the motor's rotor shaft. If not then you can grind the front of this piece to a point.