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Understand Mechanical Gear : Screw Gear | Types of gear


Why did we invent the Screw Gear?

  • Linear to rotary or rotary to linear.
  • Screws are inexpensive & available in any hardware store.
  • You can make can make very fine, accurate, & precise adjustments.
  • Eliminate the need and wait for special order mating worms.
  • Immediate reduction of high speed to low speed with no additional gears.
  • Strong build quality.  Screw wares faster than Screw Gear, and screws are cheap.
  • Great for hard to reach applications.
  • Allows for quick and easy maintenance.
  • Compatible with SAE & Metric screws and long threaded rods.
Screw Gear
Fig. 1 Screw Gear

A screw gear is a gear arrangement in which a worm (which is a gear in the form of a screw) meshes with a screw gear (which is similar in appearance to a spur gear, and is also called a worm wheel). The terminology is often confused by imprecise use of the term screw gear to refer to the worm, the worm gear, or the worm drive as a unit.

Mechanical Gear Screw Gear
Fig. 2 Screw Gear

Like other gear arrangements, a screw gear can reduce rotational speed or allow higher torque to be transmitted. The image shows a section of a gear box with a worm gear being driven by a worm. A worm is an example of a screw, one of the six simple machines.


About Keval Chaudhari

I have recently passed my Bachelor of Engineering in Mechanical Branch. I have expertise in CAD system. Also, I am interested to make new things.

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ME - mechanical Engineering
ME - mechanical Engineering

Nice information.
Thanks for sharing valuable article.