Animated two spur gears 1:5 <br>
N<sub>A</sub>=14 (red); N<sub>B</sub>=70 (green); R = 70/14 = 5
<a href="//commons.wikimedia.org/wiki/User:Jahobr" title="User:Jahobr">Jahobr</a>
<span class="int-own-work" lang="en">Own work</span>