Selection of Bearing

knowing your engineering specifications, contact tour bearing manufacturer. They are the experts. It is not only size that is important but material.

try:

http://www.globalspec.com/FeaturedProducts/Detail/Dynaroll/Bearing_Selector_Tool/13231/0

Tell me what the Application is and I will tell you what bearing to use.

Most of the Bearing Service people are not experts, but salesman - at least here in Australia

Sig

There are some good websites out there for selecting bearings and calculating the bearing life.

Here is one from SKF that has links to calculations and selection programs:

http://www.skf.com/portal/skf/home/library?contentId=448003&lang=en

Here is another from Timken that does a good job explaining the bearing life especially for taper bearings:

http://www.timken.com/products/bearings/fundamen/calculate.asp

FYI-The type of bearing (deep groove ball, cylindrical, taper, spherical, needle, etc.) determines one of the factors in the equation and will affect the bearing life.

You should be able to contact someone at a major bearing company that could help with the calculations and bearing selection. Make sure you know the loads, speeds, and environment (i.e. outside, inside, exposed to the elements, temperature range, etc.) as these all affect the selection process.

Good luck.