Patent ID: 6550970
Filing Date: 2003-04-22
Classification: F16C

Abstract:
A linear bearing, comprising a guide shaft, an outer cylinder axially movable relative to the guide shaft outside the guide shaft, a plurality of rolling elements interposed between the guide shaft and the outer cylinder, a cage provided between the guide shaft and outer cylinder for retaining said rolling elements disposed in the circumferential direction and in the axial direction, said rolling elements having a convex circular arc surface of revolution formed on the cylindrical surface thereof, an inner surface of the outer cylinder and an outer surface of the guide shaft being formed as cylindrical surfaces, respectively, the radius of the circle constituting the circular arc surface of revolution of each of said rollers being slightly smaller than the radius of the circle constituting the cylindrical surface of the outer cylinder, and the pitch of the rollers disposed in the circular direction being smaller than twice the width of each roller.