Patent ID: 6431042
Filing Date: 2002-08-13
Classification: B23D,Y10T

Abstract:
A cutting tool comprising:a base having a workpiece support surface for supporting thereon a workpiece, and having a first annular upwardly facing bearing surface; a turntable mounted on the base for rotation about a generally vertical axis, the turntable having a workpiece support surface and a second annular, downwardly facing bearing surface; a cutting unit mounted on the turntable for movement therewith; and a roller bearing mounted on the first annular upwardly facing bearing surface and for supporting the second annular, downwardly facing bearing surface, the roller bearing supporting the turntable for rotation about the vertical axis, the roller bearing including an annular, generally planar bearing cage having therein a series of openings, and a plurality of bearing elements mounted in the openings to support the turntable on the base.