| 摘要 |
<p>PURPOSE:To provide the coolant structure of a main spindle device which can be cooled uniformly and efficiently without increasing the quantity of parts and without being restrained in design. CONSTITUTION:A cooling structure for a main spindle device which is equipped with a spindle head (housing) 1 and a main spindle 3 which is axially supported on the spindle head through a roller bearing outer cylinder 9 is constituted. In this case, a spiral groove 16 is formed on the outer surface of the spindle 3, and the space formed from the spiral groove 16 and the inner surface of a bearing inner cylinder 11 is used as coolant flow passage.</p> |
