Standard Brushed DC Motor Sizes

• Standard Brushed DC Motor Sizes
  Posted by dapeake on 22 Oct, 2021 00:36
• Is there a reference or a standards organization that has settled on a set of physical guidelines for Brushed DC motors, like those found in small toys? I have seen numbers such as N20, Type 130, etc... but I have not seen a unified standard of specifications. (kinda like NEMA)
  
  For this product I am developing, I bought a motor from Digikey which they called a "standard motor". It's great, low cost and way outperforms it's datasheet.
  
   https://www.digikey.com/en/products/detail/nmb-technologies-corporation/PPN7PA12C1/2417079?s=N4IgTCBcDaIA4EYAsBmArGgtAOwCYgF0BfIA.
  
  I felt it was safe to invest time into - I created drive circuitry and firmware, resin prints of the product enclosure, etc... -  but it has a 1.5mm shaft, and I have found it extremely difficult to find plastic gears that are for 1.5mm shaft. And, making plastic injection molds around a completely proprietary motor seems unwise. So I need to speak the right search language in finding a replacement, or confirming that this motor is indeed in compliant with a standard. Any help in finding a library of standards for toy sized DC motors would be greatly appreciated!
  
  Thanks,
  
  Dan
  San Jose, CA
  
  
  
  
  

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• #1 Reply
  Posted by beanflying on 22 Oct, 2021 01:18
• No real standard other than Mabuchi is sort of a defacto standard for their own and the hundreds of clones but this is still only a portion ( a fairly large one) of the options. https://www.mabuchi-motor.com/product/knowledge/classification/designations.html
  
  
• #2 Reply
  Posted by dapeake on 22 Oct, 2021 02:15
• Great link. Mabuchi is quite massive. This is a step in the right direction. I bet I will be able to cross the motor I have to their catalog.
  
  Thanks,
  
  Dan
• #3 Reply
  Posted by salihkanber on 24 Oct, 2021 21:22
• I don't think there is, afaik each manufacturer has its own sizes and standards such as https://www.portescap.com/en/products/brush-dc-motors/all-dc-motors
• #4 Reply
  Posted by dapeake on 24 Oct, 2021 21:51
• Thanks, that's a great catalog of highly efficient motors. I bet they are pricey!
  
  Thanks,
  
  Dan
• #5 Reply
  Posted by Infraviolet on 03 Jan, 2022 17:29
• For motors with a gearbox fitted the 37mm size and "micrometal" style seem pretty consistent across many manufacturers. Gear ratios and current consumption vary wildly, and motors in the sizes are specified for different typical voltages, as well as sometiems having a rather different shape to their terminals on the rear, but the overall size and shaft specifications stay consistent across many producers.