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Reduction ratio of two gear wheels using number of teeth

Number of teeth of first gear

$ z_1 = 21 \; \;
$

Number of teeth of second gear

$ z_2 = 45 \; \;
$

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i_{gr1} = z_2 / z_1

This calculation calculates the gear ration of two gear wheels using the number of teeth.

- z1 - number of theeth of first gear
- z2 - number of teeth of the second gear

Discipline: mechanical