| 摘要 |
<p>The present invention relates to a counter bore tool device for boring and chamfering for a back face hole and, more specifically, to a counter bore tool device for boring and chamfering for a back face hole capable of performing a counter boring work on a workpiece by being connected to a power generating device, such as a drilling machine, a milling machine, and the likes, to be attached and detached to transfer rotating force to a tool. The counter bore tool device for boring and chamfering for a back face hole can have excellent practicality and efficiency by being attached to and detached from any power generating device, reduce costs by replacing only a required portion at the time of damage and replacement, easily performing a boring work by being positioned through a side surface when a counter boring work is performed on a hole of a back face of a work piece or between the workpieces, and can perform a boring work on various portions by having the low height of the counter bore tool device for boring and chamfering for a back face hole so that the work is performed without limitation on a work space.</p> |
