The difference between these two types of bearings is based upon their design and manufacturing process, the application of these two different types of bearings is based upon the load and speed of the shaft. The ball-type bearings are commonly used where the speed of the shaft is high; however sleeve bearings are preferred for high load machines. This specific case is relevant to wind turbine, generally the load of the wind turbine is low, and however it has high speed therefore based upon generic technical evaluation the anti-friction bearings i.e. ball-type bearings are preferred. The ball-type bearings are lubricated through greasing or oil, the limited amount of oil or grease is required after specific period, which is actually positive aspect of using ball-type bearings. The sleeve bearings generally require forced supply of lubrication oil to prevent any damage to the bearing material; this requires entire circuit for the lubrication inclusive of pumps, heat exchangers and filters. The space economy is vital for wind turbine; therefore the ball-type bearings are preferred for such machinery design.
The raw material generally preferred for the manufacturing of the ball-type bearing is steel alloy. ...Show more