gears|gear|china gears|gears china|worm gears|helical gears|helical gears|forged gears|racks|worm wheels|
China Ever-Power Transmission Co., Ltd.

Tel: 0086-571-88220971/88220652  Fax: 0086-571-88220651
E-Mail: hzptcorp@gmail.com  or hzpt@hzpt.com
Website http://www.hzpt.com/gears.htm
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Rotation direction
 
 
When two spur gears of different sizes mesh together, the larger gear is called a wheel, and the smaller gear is called a pinion. In a simple gear train of two spur gears, the input motion and force are applied to the driver gear. The output motion and force are transmitted by the driven gear. The driver gear rotates the driven gear without slipping.
The wheel or the pinion can be the driver gear. It depends on the exact function the designer wishes the mechanism to fulfill. When two spur gears are meshed the gears rotate in opposite directions, as shown in the figure below.
 
 

                                   Wheel and pinion