Patent ID: 6742933
Filing Date: 2004-06-01
Classification: F16C,Y10T

Abstract:
A bearing comprising:A. an outer race having spaced-apart first and second outer raceways on its inner peripheral surface; B. a rotating shaft forming an inner race having spaced-apart first and second inner raceways on its outer peripheral surface, said first and second inner raceways being opposed to said first and second outer raceways, respectively, and forming first and second ball-receiving spaces therebetween; and C. a first set of a first plurality of freely rolling first balls incorporated into said first ball-receiving space and a second set of a second plurality of freely rolling second balls incorporated into said second ball-receiving space; D. said shaft having a first, proximal, end axially extending beyond said first raceway and adapted to be driven by a driving element and a second, distal, end axially extending beyond said second raceway and adapted to transmit rotation to a working element; E. said shaft being stepped from a first diameter at the proximal side of said first inner raceway to a second diameter at the distal side of said first inner raceway; F. said first outer raceway having a counterbore portion; G. said first plurality of balls being larger than said second plurality of balls; and H. said second balls being larger in diameter than said first balls.