| 摘要 |
A circular tool arrangement wherein tools are held between first and second ring-shaped elements characterized by the first ring-shaped element having a first plurality of bores on a surface of the element on a first radius from the axis of the first ring-shaped element and having a groove receiving an inner ring having a second plurality of bores for receiving on a second radius, each of the tools having projections on one side for coacting with the first plurality of bores and projections on an opposite side for coacting with the second plurality of bores and the second ring-shaped element being provided with a circumferential groove for receiving the set of projections not being received in bores, and the second ring-shaped element also being provided with a recess which can be aligned with a tool position to provide space for removing the tool and inserting a new tool.
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