2. Gear ratio and machine Secondary two Design & Technology

3. How many teeth are there? 13

4. Number of teeth in gear 1 = Number of teeth in gear 2 = If I turn gear 1 three times, Number of turns in gear 2 = Scenario 1 12 36 1

5. Scenario 2 Number of teeth in gear 2 = Number of teeth in gear 1 = If I turn gear 1 two times, Number of turns in gear 2 = 12 24 1

6. Scenario 3 Number of teeth in gear 2 = Number of teeth in gear 1 = If I turn gear 1 three times Number of turns in gear 2 = 24 36 2

7. Scenario 4 Number of teeth in gear 2 = Number of teeth in gear 1 = If I turn gear 1 one time, Number of turns in gear 2 = 36 12 3

8. If you turn Gear One 12 times, how many times will Gear 3 turn? 12 x 36 = T 2 x 12 T 2 = 36 36 x 12 = T 3 x 24 T 3 = 18

9. Gear ratio Turns of Output Gear Gear Ratio = Turns of Input Gear Teeth of Input Gear Gear Ratio = Teeth of Output Gear Detailed information : http://www.cpo.com/CPOCataloghttp://www.cpo.com/CPOCatalog

12. This mechanism is applied in the gearbox provided.

13. Gear ratio = 38/8 x 42/12 = 16.6 Compound gear

14. Gear ratio = 38/8 x 42/12 x 42/12 x 42/12 = 203.7