Patent ID: 6368685
Filing Date: 2002-04-09
Classification: G11B,Y10T

Abstract:
A base plate comprising:a flange, and an unswaged one-piece hub contiguous with said flange, said hub having an outer surface; said hub extending perpendicular to said flange and extending from a region at which said hub meets said flange to an outer end of said hub; said hub having an inner barrel with a nominal diameter at said region at which said hub meets said flange; said outer surface of said unswaged hub having a number of axial arcuate indentations formed into said outer surface and protruding radially inwardly from said hub outer surface beyond said inner barrel, an inner diameter of said barrel at said indentations being less than said nominal diameter, each indentation extending from said outer end of said hub to a point that is located between said outer end of said hub and said region at which said hub meets said flange.