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Calculating Three Gear Ratios

Now that you have calculated a compound gear ratio from two gear ratios, we will now calculate a compound gear ratio from three gear ratios!

You will work in groups of four to calculate gear ratios and determine the resulting mechanical advantage.

Calculation 2

Fill in the missing calculations from the Gear Ratio table. Keep in mind, each person should be calculating according to their role.

Gear ratio calculation table with a third gear ratio added, and values blank. Gear ratio 1 reads a driven gear of 12T and a driving gear of 60T. Gear ratio 2 has a Driven gear of 36T and a driving gear of 12T. Gear ratio 3 has a driven gear of 60T and a driving gear of 36T.

  • Role 1: Calculate the Gear Ratio 1 row of the above table. Show all work in your engineering notebook.
  • Role 2: Calculate the Gear Ratio 2 row of the above table. Show all work in your engineering notebook.
  • Role 3: Calculate the Gear Ratio 3 row of the above table. Show all work in your engineering notebook.
  • Role 4: Calculate the Resulting Ratio row of the above table. Check the calculations from Gear Ratio 1, 2, and 3 before calculating the final compound gear ratio. Show all work in your engineering notebook.
  • All Roles: Calculate the Advantage row of the above table. Show all work in your engineering notebook.

Calculation 3

Fill in the missing calculations from the Gear Ratio table. Keep in mind, each person should be calculating according to their role.

Gear ratio calculation table with a third gear ratio added, and values blank. Gear ratio 1 reads a driven gear of 12T and a driving gear of 36T. Gear ratio 2 has a Driven gear of 36T and a driving gear of 60T. Gear ratio 3 has a driven gear of 12T and a driving gear of 60T.

  • Role 1: Calculate the Gear Ratio 1 row of the above table. Show all work in your engineering notebook.
  • Role 2: Calculate the Gear Ratio 2 row of the above table. Show all work in your engineering notebook.
  • Role 3: Calculate the Gear Ratio 3 row of the above table. Show all work in your engineering notebook.
  • Role 4: Calculate the Resulting Ratio row of the above table. Check the calculations from Gear Ratio 1, 2, and 3 before calculating the final compound gear ratio. Show all work in your engineering notebook.
  • All Roles: Calculate the Advantage row of the above table. Show all work in your engineering notebook.
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