| 摘要 |
A machine tool spindle, which serves for interchangeably receiving tool holders (13) having different shanks (8,16), has in the spindle head (1a) thereof a frusto-conical receiving bore (3) for the reception of a steeply tapered conical shank of a first tool holder. The spindle head (1a) is provided with an end surface (4) which surrounds the frusto-conical receiving bore (3). Immediately adjacent this end surface there is provided a mating bore (8), the diameter (D) of which is slightly greater than the theoretical diameter of the frusto-conical receiving bore (3) in the plane of the end surface (4). The axial length of the mating bore (8) is equal to about 10 to 15% of the theoretical diameter. The mating bore (8) serves for the reception of a cylindrical mating extension (15) of the second tool holder (13). |
