Regular Worm Gears vs Globoid Worm Gears





What are Worm Gears?

A worm gear set comprises a screw-shaped worm or shaft and a gear wheel. This set is specifically used to reduce speed and amplify torque. Worm gears are used in various different industrial fields. They have many advantages such as having a structure that is relatively easy to produce, self-locking properties, and increased space efficiency.

One of the downsides is that they have fewer engagement points between the worm thread and wheel teeth, which can lead to increased heat generation and a higher risk of premature breakage and damage.

  • Non-parallel, non-intersecting axis
  • The meshing of surfaces in the form of point or line contact
  • Less contact surface
 

An example of the damage incurred:

  • Fracturing of tooth
  • Worn out and thinning of teeth

 

What are Globoid Worm Gears?

Similar to normal worm gears, globoid worm gears provide a high gear ratio but have a seemingly simple yet challenging-to-produce structure. Globoid worm gears can push higher outputs and are more precise compared to regular cylindrical worm gears. Their structure involves more engagement and continuous sliding contact, resulting in efficient transmission, reduced heat generation, and has a higher resistance to sudden and momentary weight or impact.

 
High Efficiency, High Output
 
  • Structure has higher gear teeth engagement between the wheel and the worm
  • Increased efficiency through simultaneous surface contact area
  • Approximately 10% higher efficiencies than regular worm gears
 
Reduced in Size, Increased Resistance
 
  • Better transfer of energy due to more engagement of teeth while also reducing the dimensions of the gear set
  • Enhanced durability and impact resistance attributed to simultaneous surface contact





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