Throughout this site we use many technical terms, and given the breadth of readership our site enjoys, sometimes we are remiss and incorrectly assume everyone knows what we are referring to. For those that do not, here are some explanations of the technical terms use.
A friction-reducing device for carrying a shaft in its housing when speeds are low and no continuous lubrication is available. It consists of an inner race fixed to the shaft and an outer race fixed to the housing. A number of balls, often fitted in a locating cage to prevent them touching one another, are introduced between the races.