| 摘要 |
A grinding wheel radius dresser including a dresser housing, a spindle having a tapered outer bearing surface, a drive means for rotating the spindle and a damage resistant bearing. The bearing includes a tapered inner bearing surface produced by molding a low friction bearing material to match the tapered spindle bearing surface, and is mounted in the housing with the spindle bearing surface in rotating contact with the inner bearing surface. The bearing is preferably spring mounted to slide longitudinally into the housing in the event of an impact further minimize the likelihood of any damage. The method of making the precision bearing and spindle assembly comprises the steps of machining a spindle, producing a precision tapered outer bearing surface on the spindle, positioning a mold cavity around the spindle bearing surface, providing a moldable bearing material and a hardener for the bearing material; cooling the bearing material and/or the hardener, reacting the moldable bearing material with the hardener, filling the mold cavity with the bearing material, and allowing the reacted bearing material to harden to form a bearing molded directly against the tapered spindle bearing surface.
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