MYPIBLOGs

What is a gear ?

A gear is a kind of machine element in which teeth are cut around cylindrical or cone shaped surfaces with equal spacing. By meshing a pair of these elements, they are used to transmit rotations and forces from the driving shaft to the driven shaft. 

Gears can be classified by shape as involute, cycloidal and trochoidal gears. Also, they can be classified by shaft positions as parallel shaft gears, intersecting shaft gears, and non-parallel and non-intersecting shaft gears. The history of gears is old and the use of gears already appears in ancient Greece in B.C. in the writing of Archimedes.

Why Gears Are Needed?

These are basically used to do the following task:

1)Changing the direction of rotation

2)Increasing or decreasing the rotation speed

3)Increasing force

4)Keeping the rotation of two axis synchronized

5)Measuring time