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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|
Worm and worm wheel
  
  
A gear which has one tooth is called a worm. The tooth is in the form of a screw thread. A worm wheel meshes with the worm. The worm wheel is a helical gear with teeth inclined so that they can engage with the thread ĘC like worm. Like the crossed helical gears, the worm and worm wheel transmit torque and rotary motion through a right angle. The worm always drives the worm wheel and never the other way round. The mechanism locks if the worm wheel tries to drive the worm. Worm mechanisms are very quiet running. An example of a worm and worm wheel is shown on the right hand side below. An application of the worm and worm wheel used to open lock gates is shown on the left hand side below. 
  
  
  
  
  
 
   Worm and worm wheel