| 摘要 |
PURPOSE:To machine a dynamic pressure generating groove with high accuracy and easily by fixing a fixed pin and hard balls to a guide pin to apply rotating and feed speed in a sleeve. CONSTITUTION:A plurality of guide holes 6A, 6B are disposed symmetrically about the central axis and radially, and the central hole 6c of a guide pin 6 is coupled to the guude holes 6A, 6B. A hard fixed pin 8 is fixed to the central hole 6c, and the total of a diameter of the fixed pin 8 and diamters of two balls is a little larger than the inside diameter of a sleeve 2 of a fluid bearing. Further, rotating and feed speed is applied to a shaft of the guide pin 6. Thus, a dynamic pressure generating groove can be formed in the inside diameter of the sleeve with high accuracy and easily. |
