Speeds and vibration
There is a limit to the speed at which rolling bearings can be operated. Generally, it is the operating temperature for the lubricant being used or the material of the bearing components that sets the limit.
The speed at which limiting operating temperature is reached depends on the frictional heat generated in the bearing (including any externally applied heat) and the amount of heat that can be transported away from the bearing.
Bearing type and size, internal design, load, lubrication and cooling conditions as well as cage design, accuracy and internal clearance all play a part in determining speed capability.
In the product tables generally two speeds are listed: (thermal) reference speed and (kinematical) limiting speed, the value of which depending on what criteria are considered.