| 摘要 |
There are provided a tool, a grinding cup tool, a core bit and a propeller used in the grinding cup tool, all of which are used to cut, drill, planarize and grind a brittle workpiece such as stone, brick, concrete, asphalt and the like, and by themselves are able to collect dusts which are generated during the processes. The tool, the grinding cup tool, the core bit and the propeller used in the grinding cup tool, all of which include a core having tips fixed therein, each tip having abrasive particles distributed thereon; and a driving machine for driving the core, include a propeller having at least two wings, the wings being positioned above the tips and rotating with the core to guide dusts, which are generated during the processes, upwards. The tools may be useful to significantly reduce the generation of scattering dusts (particles) without the use of a separate dust-collecting apparatus since they by themselves are able to collect dusts which are generated during the dry process, and to easily collect generated dusts in one collection place and discard the collected dusts, and to improve the machinability of products by removing fine dusts generated during a cutting process.
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