Small dc brushed electrical motor format "280"?

[Joel_Lapointe]

I'm searching over the Internet a type of small DC brushed motors.
I came to the conclusion that there is a standard for naming these. However, I don't find the original source of this standard.
Different manufacturers are naming these motors with the number "280" placed withing other alphanumerical codes.
They all share the same external geometry (diameter, length...). However,their electrical characteristics differ greatly.
Exemples:
- Mabuchi : FC-280PT-20150
- Nichibo : UC-280P-19160-NR
- Kysan : FC-280PA
- CLCZH : CL-FA280
- Ningbo Leison : FK-280

Is there an original source or a known standard for this "280" numbering.

Thank you.

 

[Gr8blu]

Most non-North American manufacturers use the IEC standards as their basis, with some national exceptions/additions. The Japanese have their own national standards (JIS) that are more-or-less based on the IEC standard now in effect.

The "280" designation referred to by the OP is a dimension used to determine some basic geometry for the exterior of a given machine; the "envelope volume" if you will. Specifically, the 280 term refers to the distance from the shaft centerline to the flat surface (e.g. bottom of machine foot). This tends to drive the distances for maximum outside diameter, distance between bearing centers, practical shaft diameter for torque transmission, etc. 280 would be a machine with 280 mm (just over 11 inches) shaft height.

Since a given diameter can have multiple slot combinations and each slot combination may have one or more winding possibilities, more than one rating can be accommodated within the basic overall geometry. It also means that there may be some performance differences from one manufacturer to another, since only the EXTERIOR geometry is standardized.

The naming convention using shaft height applies to both AC and DC machines in the same way that NEMA applies its frame designations (such as 445T frame).

 

[Joel_Lapointe]

Well,

280 would be a machine with 280 mm (just over 11 inches) shaft height.

Would be pretty much big for a small brushed 12V dc motor for automotive door locker and/or appliance motor!
Is there a different standard for these small motors?

 

[Gr8blu]

All your listed equipment manufacturers in the original post are Japanese or Chinese. I would start by seeing what the Japanese national standard (JIS) documents have to say about naming conventions for rotating electric machines.

Just took a peek at the Ningo Bo website. It would appear that they "sort of" stick to the shaft height approach. Except that only the first two digits refer to the shaft height (or maybe the machine outside diameter). In this case, a "280" frame would have either a 28 mm shaft height or be 28 mm in overall diameter (the Ning Bo site includes geometries that fit both possibilities).

 

[edison123]

In a given motor frame size, 2 to 4 speeds can be designed with corresponding power rating. You need to look for the same frame with the same speed and HP that you want.
No standards will specify the power and speed ratings for frame sizes.