Depending on the application, fan bearing type should also be a consideration with sleeve and ball bearings being the most common. Sleeve bearings, which are the simpler and lower cost option, have proven to operate as well as ball bearing fans at consistently lower temperatures. However, at variable or high temperatures sleeve bearings tend to degrade more quickly and can begin to experience wobble, noise, and friction issues commonly found in the sleeve bearing design. On the other hand, ball bearings address many of the uneven wear and friction problems found in sleeve bearings resulting in a significantly higher operating life. They can also be operated at any angle for use in portable applications, but at the same time are less impact resistant, more complex, and costlier than sleeve bearings. As a third option, Same Sky has developed the omniCOOL™ system. Found in its line of advanced sleeve bearing fans, the omniCOOL system promotes extended fan life, while bridging the cost-performance gap between traditional bearings on the market. This technology incorporates either a magnetic structure that enables rotor-balancing to minimize tilt, wobble, and friction, allowing for operation at any angle, or an enhanced bearing with specialized grooves that improve circulation of lubricant around the shaft. For more in-depth information on fan bearing types, view Same Sky's omniCOOL™ Bearing System product training module.