Comparing Miniature DC Motors And Gearboxes

Unlike their fractional and integral horsepower cousins that can be "Rated" using norms by such organizations as the National Electrical Manufacturers Association (NEMA) or the International Electrotechnical Commission (IEC) there are no such standards for rating small fractional and sub-fractional horsepower dc and stepper motors.

Each Manufacturer must decide their own rating system

Trying to compare published data from multiple manufacturers is akin to having a conversation in the Tower of Babel. Nobody speaks the same language!

To exacerbate this situation is the fact that today engineer routinely download PDF datasheets from the Internet and/or receive them by email. Important supporting information is usually omitted.