| 摘要 |
<p>A drilling tool of the loose top type includes a basic body (1) having two bendable branches (15) having inner support surfaces (17) that are resiliently pressable against side contact surfaces (23) of a replaceable loose top (2). The mounting of the loose top is affected by turning-in from an initial position to an operative end position. An edge (40) along each side contact surface (23) then bends out the branches (15) and subjects the same to a spring force that reaches a maximum in a dead position so as to then decrease somewhat up to the operative end position. During the final phase of the rotary motion, the operator obtains - in a tactile and/or auditory way - confirmation of the loose top indeed reaching its operative end position.</p> |
