Bearing Nomenclatures

As soon as I've seen in internal market, bearing nomenclature and part numbers change with manufacturer, although they may be interchangeable.

I recommend you to look at some suppliers catalogs to determine the candidates to meet your requirements. You'll note that the larger the bearing, less speed it can withstand. Take a look if you don't need any other feature like self compensation, sealed, high temp, heavy duty, vibration, dirty environment... Some features must be chosen for the right bearing type. Some of them will influence the expected life limit. You will also check it in the catalog.

In my place, for specific applications, you can even call a rep for help without any aditional charge.

Agreed, lots of manufacturers' have online application guides. Ideally, type in roller bearing into globalspec's search, find a company that meets your design requirments; then check with the suppliers website to see if they have any technical references or application guides.

Needle bearings are better than ball bearings. The temperature they will run at is just as important as the speed. High speed bearings do exist, grinding machines run at up to tens of thousands of rpm. Also centrifuges need to run at prolonged high speeds.

single row ball bearings for high speed or high heat applications typically have marginally smaller balls to allow for heat expansion. Most manufacturers include this information as a suffix to the part number. a 6204 bearing made for normal usage will have a c1 or c2 rating, and this is not normally included in the part number. c3, c4 and higher classifications are normally indicated as a suffix to the part number. A typical SKF part number goes something like 6204-2Z C3. They are common in electric motors.

From the number of bearing,there are no speed info in it.

For your application of speed up to 24000rpm with single roll ball bearing,It will be used in electric-axial or motor of grinding machines.

It has special mumber/nomenclature in manufacture catalogue.

Look up all info relating size+ maximum operating speed+ max load at Interactive SKF Catalog:

http://www.skf.com/portal/skf/home/products?paf_dm=shared&maincatalogue=1&lang=en&newlink=3

By the way--you cannot read out speed limits from Bearing No. But sizes-YES(mostly)