TOOL FOR MACHINING FLUID BEARING DYNAMIC PRESSURE GENERATION GROOVE AND MACHINING BALL USED FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a tool for a fluid bearing dynamic pressure generation groove processing capable of maintaining a good processing accuracy for a long time. SOLUTION: This is an invention of a tool for a fluid bearing dynamic pressure generation groove processing including a hard metal made processing ball 1 rotatably retained at a designated position and forming a dynamic pressure generation groove 2 on a bearing member by pressing the processing ball 1 on the bearing member. A chlorine ion injection layer is formed on a surface of the processing ball.