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The 4 Basic Styles of Gears

April 19, 2012

Can you tell the difference between a bevel gear and a helical gear? How about the advantages of cut metal vs. powdered metal? All gears are not the same. Here is some information on gears you should consider when talking to a motor manufacturer. For more help, look to our post on The Ins and Outs of Gears.

There are 4 basic styles of gears: spur, helical, worm and bevel.

Types of Gears

Spur Gear: The spur gear has a helix angle of 0°.

Worm Gear: Worm gears are found in right angle gearboxes. They “turn a corner.”

Helical Gear: This is an angle toothed gear. The angle can range from application to application, usually between 1° and 45°.

Bevel Gear: Bevel gears tend to have a lower ratio and run at a higher efficiency than worm gears.

Additional Gear Information

  • Pay attention to whether or not the gears have been heat treated. Gears that are heat treated after they are hobbed will have increased strength.
  • Both gears and shafts can be hobbed, and a special hobbed shaft can be found in parallel shaft gearboxes.
  • Axial load is the amount of weight or pressure along the drive shaft; it is important to use bearings that can withstand the pressure of the weighted shaft.
  • There is a difference between cut and powdered metal gears. Cut gears have a higher tooth accuracy and tend to be the stronger gear option.

How to use the Motor Search Tool

Narrow your search by selecting motor type, gearbox, voltage, and phase options for your desired motor.

Select a dominant variable: choose one of the three parameters to narrow your search. The selected variable determines which slider bar you will be able to manually move.

Use the slider corresponding to your dominant variable to further narrow your motor selection. The other sliders will automatically move to show available ranges based on the range of your selected variable.

Results will upload as your search criteria changes. If you have any questions regarding your results or how to use the search tool, you can chat with us using the green tab on the left-hand side of your screen.


Note: Groschopp Universal motors are custom built to fit your application so no additional options are available to narrow the search. Selecting the Universal motor type will prompt a message taking you to the Universal product page.

Not sure what you need?

One of our team members would be happy to help. Contact us at 800-829-4135 or by email at sales@groschopp.com. You can also chat with us using the green tab on the left side of your screen.

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Universal Motors

Groschopp Universal motors are custom built to fit your application so no additional options are available to narrow the search. Standard frame sizes and motor features can be found on the Universal page.

go to Universal page