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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
gears|gear|china gears|gears china|worm gears|helical gears|helical gears|forged gears|racks|worm wheels|
Spur gears
 
The spur gear is the last gear we will look at and the most important as far as we are concerned. We will be looking at the gear terms and how to draw the gear teeth using Unwins construction. Firstly, we will discuss the spur gear itself.
 
A spur gear is one of the most important ways of transmitting a positive motion between two shafts lying parallel to each other. A gear of this class may be likened to a cylindrical blank which has a series of equally spaced grooves around its perimeter so that the projections on one blank may mesh in the grooves of the second. As the design should be such that the teeth in the respective gears are always in mesh the revolutions made by each is definite, regular and in the inverse ratio to the numbers of teeth in the respective gears. This ability of a pair of well made spur gears to give a smooth, regular, and positive drive is of the greatest importance in many engineering designs. An example of two spur gears in mesh are shown below.
 
 
 
 
Spur gears