Tool interface for centrally coupling e.g. drill bit with shaft of multi piece tool, has circular bar slotted by groove between inner conical surface and outer conical surface of interface surface of interface part

摘要

The interface has interface parts with interface surfaces that are complementary to each other and laminarly attached to each other. One of the interface surfaces has an outer conical surface corresponding to an inner conical surface (21) of the other interface surface (9) and an inner conical surface corresponding to an outer conical surface (22) of the latter interface surface. A circular bar (23) is slotted by a groove (24) between the inner and the outer conical surfaces of the latter interface surface.