| 摘要 |
A boring device includes a case configured to be provided with a hole machining part; a boring tool configured to be inserted into the hole machining part; and a spin member configured to be detachably provided from the boring tool and rotate the boring tool. The boring tool is made of an aluminum material and thus has a reduced weight to reduce load of the spin member so as to machine the hole of the case even when a separate guide pad is not applied to the boring tool. This minimizes cost and improves quality, and the boring tool corresponding to the hole is provided at the time of machining the hole, thereby improving grinding workability and marketability. |
