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Step 5The Final Gear and Mounting Frames to the Base
Hopefully your mechanism is functioning, and it is time to mount it to the base. Before you do this, you will need to drill a 3/8 inch hole 15 inches from the bottom of the base (see schematic), and into the side of each 20 inch 2x4. These holes should be at the exact height!
On the side where the crank is going to be, you will need to also drill two 5/16 inch holes to secure the final gear in place (see schematic). You can drill the holes in the right place by placing the final gear on the outside of the 2x4 where the 3/8 inch hole was drilled, and mark the wood where the mounting holes are on the gear. Try to center the 3/8 inch hole in the exact center of the gear while doing this.
Next, take the 6 inch 3/8 rod and secure it on the left side of the base. Once again, try using a combination of stop nuts, regular nuts, and washers.
Now, secure the right side of the frames to the base. Slip the 12 inch 3/8 rod through the hole on the outside of the 2x4 and into the 3/8 inch hole of the big rod, however, you will need the rod to go through the gear, as it will be impossible to mount it in the right place if you do not. After you have secured the 3/8 rod, you will need to mount the gear. Take the two 4 inch 5/16 rods and slip them through the holes you drilled. Then loosely mount them using two regular nuts.
On the side where the crank is going to be, you will need to also drill two 5/16 inch holes to secure the final gear in place (see schematic). You can drill the holes in the right place by placing the final gear on the outside of the 2x4 where the 3/8 inch hole was drilled, and mark the wood where the mounting holes are on the gear. Try to center the 3/8 inch hole in the exact center of the gear while doing this.
Next, take the 6 inch 3/8 rod and secure it on the left side of the base. Once again, try using a combination of stop nuts, regular nuts, and washers.
Now, secure the right side of the frames to the base. Slip the 12 inch 3/8 rod through the hole on the outside of the 2x4 and into the 3/8 inch hole of the big rod, however, you will need the rod to go through the gear, as it will be impossible to mount it in the right place if you do not. After you have secured the 3/8 rod, you will need to mount the gear. Take the two 4 inch 5/16 rods and slip them through the holes you drilled. Then loosely mount them using two regular nuts.
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