Bevel gears at right angles

In the next example, we are going to build a gearbox using a 12-tooth bevel gear along with the large 36 tooth straight gear with double bevels. These gears actually rotate at right angles to each other. Since the motor drives the smaller gear, the output of our gearbox is actually slower than the motor. However, we will gain torque in this system, so we have a mechanical advantage of 3. We will be using the medium motor in this model.

In the following five steps, we will build a gearbox with two gears at right angles:

1. First attach two friction pins to the medium motor.
   
2. Next, attach the open frame to the motor. The open frame is essentially our gearbox.
   
3. Next, place the 8-mod axle (with stop) and the beveled gear into the medium motor. Make sure the axle fits into the motor.
   
4. Now, insert the large gear and an axle into your gearbox. The teeth of both the gears should interlock.
   
5. Finally, add a flag so you can see the rotations of the large gear.
   

Next, write this simple...