24 March 2017

Double helical gear advantages and disadvantages

Advantages of double helical gear :

  • They develop opposite thrust reactions thus cancel out the thrust force within the gear itself.
  • The net axial force that acts on the bearings is zero.
  • Power transmitting capacity is very high.
  • By using this high pitch line velocities can be attained.

Disadvantages of double helical gear :

  • A double helical gear is expensive as compared to helical gear.
  • Balancing of thrust forces depends upon the equal distribution of load between the right and left parts of the gear. Therefore, a high degree of precision is required to locate double-helical gears axially on the shaft.
  • No external forces are present.