| 摘要 |
<p>This invention relates to a spindle device for machine tool and a multi spindle head for machine tool to lubricate the tip of a tool (30) machining comparatively deep parts of a workpiece with a mist of cutting oil. The spindle device for machine tool comprises a main spindle (3) having a tool holder (8) and a tool (30) at the tip thereof, an axial hole (10c) provided at the center of the main spindle (3), and a cutting oil supply pipe (25) provided in the axial hole (10c). The cutting oil supply pipe remains irrotational regardless of rotations of the main spindle (3). A mist of cutting oil is supplied from the outer end of the main spindle (3) into the cutting oil supply pipe (25), and spouted from the tip of the tool (30). The multi spindle head for machine tool comprises a through hole (b) for cutting oil provided at the center of each spindle (111) in longitudinal direction thereof. A mist of cutting oil is supplied into the through hole (b) from the outside, and spouted from the tip of a tool (119). <IMAGE></p> |
