Bearing are precision components that are placed around the shaft of the motor to support them and ensure that the spindle turns smoothly with no wobbling or vibration. As hard disk speeds increase, the demands placed on the bearings increase dramatically. Many of the noise and heat issues created by fast motors are related to the bearings, so engineers are constantly trying to improve them. Most hard disk motors use ball bearings . They are also used elsewhere inside the PC, such as higher-quality power supply fans .
Some hard disks use special fluid-dynamic bearings instead of ball bearings.
It also theoretically greatly increases bearing life, though ball bearings should have a life exceeding the hard disk's normal service life anyway. This page has been served 6845 times. Copyright 1997-2001 Charles M. Kozierok . All Rights Reserved. Not responsible for any loss resulting from the use of this site .