| 摘要 |
PROBLEM TO BE SOLVED: To prevent cutting water from ingressing into a bearing area, and eliminate non-conformity due to the generation of rust or the like in a spindle unit composed of a housing, and of a rotation axis mounted to the housing by way of bearings in such a way as to be freely rotated. SOLUTION: A spindle unit 1 is incorporated in a cutting device cutting and grooving a work piece while cutting water is being fed and the like, and has a blade mounted onto the tip end of it. The spindle unit 1 includes at least a housing 3, a rotation axis 2 to be mounted onto the housing 3 in such a way as to be freely rotated by way of bearings 4, an inner ring holding member 20 which is threadedly adhered to the rotation axis 2 to hold the inner ring 4a of the bearings 4, and an outer ring holding member 21 which is fixed to the housing 3 to hold the outer ring 4b of the bearings 4. And a water proof cover 22 is formed, which covers the outer ring holding member 21 in a non- contact manner to allow the water proof cover 22 to prevent cutting water from ingressing into a space between the outer ring holding member 21 and the inner ring holding member 20, that is, a bearing area, for eliminating the generation of rust. |
