| 摘要 |
In a machine tool having a rotatable chuck and tool magazine drum, each tool holder is provided with a protective tube concentric with the shank of the tool holder. The chuck and each compartment of the magazine drum are provided with an annular recess. The tube is housed in the recess when the toolholder is placed in the compartment or chuck housing, creating a labyrinth which prevents the shank from dirtying during operation. The recess of the chick is also provided with packing, sealing the tube and the recess. |
