These gears are suitable for learning the basics of gears. It is not intended to be a high precision or strength substitute. It is, however, a great way to slap together simple prototypes, build a spirograph, hobo clock, or crane.
Step 1: Materials and Tools
Dremel or equivelant high RPM cutting tool
Two permanent markers of differing colors
Hot Glue Gun
Paper printout of attached Visio
Box of pencils. For each 32 tooth spur gear, plan on using about 4 pencils. I used #2 pencils from the dollar store.
2 Liter Plastic Bottle Cap
Step 2: Attach CD Template to a CD/DVD
Cut the circle out.
Spray the back of the circle with adhesive spray.
Attach template to the CD/DVD.
Step 3: Mark Pencils for Cut Marks
For each pencil, you will need to mark the CD/DVD groove location and the tooth full cut line.
Color #1 (Black):
Line the pencil along the ruler and place a mark every 1/2 US Inch.
Mark the edge of the pencil (lead profile side) so that it indicates which side was just marked.
Rotate the pencil 180 degrees so that the previously marked side is lying facing down. Verify with your edge mark.
Color #2 (Purple):
Offset the pencil on the ruler 1/4 US Inch and place a mark every 1/2 US Inch. This will be the groove location.