Patent ID: 6148501
Filing Date: 2000-11-21
Classification: F16C,G11B,H02K,Y10T

Abstract:
A method of fabricating a spindle assembly that includes the following components: a two piece hub, each piece of the hub defining one of two opposing bearing surfaces of a conical hydrodynamic bearing, a shaft, first and second opposed bearing cones each having a second bearing surface of the conical hydrodynamic bearing, and a stator assembly, comprising the steps of(a) mounting the stator assembly onto the shaft,(b) inserting the shaft through an opening in a first piece of the two-piece hub,(c) positioning the second piece of the two piece hub onto the shaft opposite the stator assembly from the first piece so that the stator assembly is enclosed within the hub and the one surface of each conical hydrodynamic bearing is located at opposite ends of the hub and surrounding the shaft,(d) securing together the first and second pieces of the hub, after executing steps (a), (b), (c), and (d), then(e) securely positioning the first bearing cone about the shaft, and then(f) progressively positioning the second bearing cone along the shaft toward the first bearing cone until the gaps between the bearing surfaces of the bearing cone and the hub are within a preselected tolerance.