Patent Number: 6,250,807

Title: Hydrodynamic type bearing and hydrodynamic type bearing unit

Abstract: A thrust bearing section (14) is constituted by one bearing end face (11f1) of a hydrodynamic type oil-impregnated sintered bearing (11) and a flange portion (13a) provided on a rotating shaft (13). The squareness between the bearing end face (11f1) and the bearing inner periphery (11h) is set within 3 .mu.m, and the squareness between the flange portion (13a) and the outer periphery of the rotating shaft (13) is set within 2 .mu.m. The bearing bore diameter d and the bearing length L of the hydrodynamic type oil-impregnated sintered bearing are set as L.ltoreq.1.2 d, and a radial bearing surface (11b) is arranged at one place on the bearing inner periphery (11h).

Inventors: Mori; Natsuhiko (Mie-ken, JP), Okamura; Kazuo (Mie-ken, JP)

Assignee: NTN Corporation

International Classification: F16C 33/04 (20060101); F16C 33/10 (20060101); G11B 19/20 (20060101); F16C 032/06 ()

Expiration Date: 06/26/2018