Question

Please help, it's very important!

The driver gear has 4 teeth (T), and its speed is 80 RPM. The driven gear needs a speed of 40 rpm. How many teeth (t) should it have?

The driver gear has 40 teeth (T). The driven gear has 10 teeth (t), and a speed of 12 rpm. What is the speed (RPM) of the driver gear?

Thank you so much!!!

Answer 1

The gear ratio is calculated by dividing the output speed by the input speed (i= Ws/ We) or by dividing the number of teeth of the driving gear by the number of teeth of the driven gear (i= Ze/ Zs)