Aug 102013

Spur GearSpur gears have their own advantages, disadvantages and applications.

Advantages of Spur Gear:

  1. Spur gears have high power transmission efficiency.
  2. They are compact and easy to install.
  3. They offer constant velocity ratio.
  4. Unlike belt drives, spur gear drives have no slip.
  5. Spur gears are highly reliable.
  6. They can be used to transmit large amount of power (of the order of 50,000 kW).

Disadvantages of Spur Gear:

  1. Spur gear drives are costly when compared to belt drives.
  2. They have a limited center distance. This is because in a spur gear drive, the gears should be meshed and they should be in direct contact with each other.
  3. Spur gears produce a lot of noise when operating at high speeds.
  4. They cannot be used for long distance power transmission.
  5. Gear teeth experience a large amount of stress.

Applications of Spur Gear:

Spur gears have a wide range of applications. They are used in:

  1. Metal cutting machines
  2. Power plants
  3. Marine engines
  4. Mechanical clocks and watches
  5. Fuel pumps
  6. Washing Machines
  7. Gear motors and gear pumps
  8. Rack and pinion mechanisms
  9. Material handling equipments
  10. Automobile gear boxes
  11. Steel mills
  12. Rolling mills

If you know about any other advantages, disadvantages and applications of spur gear, you can share it by commenting on this article :)

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Written by

I am a mechanical engineer with a passion for technical stuff. I am the founder and former editor-in-chief of

  • Syed Hanif Ullah Shah

    why small pulleyis used in motor?