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Planetary Gear Product Codes Explained

At Matex Gears, we offer many gears in various sizes, materials, and qualities, so we put our product codes into place to make it easy for our customers to get the gears they need!

How Do Product Codes Work?

Outside Diameter

The first part of the product code is a number that shows the outside diameter of the gear; in our example, it is 75. We have gears in OD sizes from 26 mm, 35 mm, 54 mm, 75 mm, 85 mm, 120 mm, 200 mm. 

Gear Ratio

The next number is the gear ration; in our example, it is a 4. We make them in 3:1, 4, 5:1, and 7:1. We can make any combination of those to achieve the right ratio for your application. 


The next step is identifying the material of the gear. In our example, the letter is an M, which stands for all steel. You could also see an S for sintered metal and a P for plastic. 

Input Shape

Next is the input shape. We have various input shapes, male and female, and shafts. 

Output Shape

We also have various output shapes, male and female, and shaft. 

Tooth Width

The last number in the planetary gear product code is the tooth width.

Learn More About Planetary Gear with Matex

If you are looking for a specific outcome for your gears in your application and need assistance choosing the right gear, contact us today to learn more about our high-quality planetary gears and accessories. 

You can also learn more by watching more videos like this in our video library. 

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