Needle bearings are a form of cylindrical bearings, in which length of the roller measures at least six times more than it\'s cross-section. They are undoubtfully the biggest group of ball bearings taking into account design, measurements, variety of types and usage possibilities. Each of their forms has it\'s characteristic features, however in general needle bearings have major load carrying abilities with comparatively small cross
[Last Updated: 2009-09-13 22:48:28]

Skate bearings are small donut shaped casings which contain tiny metal balls. The casings can have one or both sides sealed.  A precision bearing has both sides sealed and the balls are packed in grease inside.  These require little maintenance and may last the life of the skates. Semi sealed bearings are closed on the outer side while the inner side exposes the metal balls to view. These bearings have to be lubricated regu
[Last Updated: 2009-09-13 22:47:47]