2 ROTARY TRANSMISSION

ROTARY TRANSMISSION

These mechanisms have two purposes:

• Transferring rotary force from an imput location to another location.
• Changing the rotary speed by using rotating elements of different sizes.

The relatonship between the speeds of the two wheels in inversely proportional to their sizes.

                                                       N1/N2=D1/D2 

This relationship is called the ratio of transmission, where N is the speed of rotation and D is the diameter of the wheel.

To calculate the ratio of transmission between the first wheel and the last wheel of a belt drive, we must multiply the ratios of transmission of the first pair of wheels and the second pair of wheels:

                                              N4/N1=D1 X D3/D2 X D4

We use different types of gears when two axes are parallel, perpendicular or crossed.