Magnetic recording device

A magnetic recording device comprising:

• a spindle for supporting a magnetic record disk to rotate with the spindle, the spindle including a plurality of magnets which are arranged circumferentially around the spindle and which extend in a longitudinal direction of the spindle;
• a stator including a plurality of winding coils to generate a magnetic force between the stator and the spindle to rotate the spindle, the magnetic force having a radial component which extends in a radial direction of the spindle;
• magnetic head means for magnetizing or demagnetizing portions of the magnetic record disk so that information is output from the magnetic record disk or is input into the magnetic record disk, the magnetic head means moving on the magnetic record disk in the radial direction of the spindle so that a wide radial surface of the magnetic record disk is used for recording the information;
• and
• bearing means for rotatably supporting the spindle, the bearing means including a radial bearing portion for supporting the spindle in the radial direction of the spindle against the radial component of the magnetic force and n axial bearing portion for supporting the spindle in the longitudinal direction of the spindle;
• wherein the magnetic recording device further comprises helical lubricant grooves for holding a lubricant, the helical lubricant grooves having first and second portions provided on at least one of the spindle and the radial bearing portion, the first and second portions of the helical lubricant grooves having different helical angles to form angles therebetween, and the angles having vertices arranged within a width of the magnets in the longitudinal direction of the spindle.