Patent ID: 8562218

Claim:
A fluid dynamic bearing comprising a bearing bush ( 10 , 210 ) having a central bearing bore ( 11 , 211 ) and a shaft ( 12 , 212 ) disposed in the bearing bore, wherein the surfaces of the shaft ( 12 , 212 ) and of the bearing bore ( 11 , 211 ) that are facing each other are separated from one another by a bearing gap ( 14 , 214 ) filled with a bearing fluid, and wherein the shaft ( 12 , 212 ) and the bearing bush ( 10 , 210 ) are rotatable with respect to each other, wherein a first radial bearing section ( 14 a , 214 a ) and a second radial bearing section ( 14 c , 214 c ) are disposed along the bearing gap ( 14 , 214 ), and a separator section ( 14 c , 214 c ) is disposed between the radial bearing sections, and wherein the bearing gap ( 14 , 214 ) has a first inner width ibl and a second inner width ib 2 in the region of the first and of the second radial bearing section ( 14 a , 14 c ; 214 a , 214 c ) on the sides facing the separator section ( 14 b , 214 b ) and a first outer width ab 1 and a second outer width ab 2 on the sides remote from the separator section ( 14 b , 214 b ), wherein spatial differences ib 1 −ab 1 and ib 2 −ab 2 lie within a tolerance range of a−t micrometers to a+t micrometers, where a>0 and t>a.