stirnsenker (mit morsekegel für lehrenbohrwerk)

listen to the pronunciation of stirnsenker (mit morsekegel für lehrenbohrwerk)
ألمانية - الإنجليزية
counterbore
To create such a cylindrical recess
A cylindrical recess, typically machined around a hole to admit a screw so that it sits flush with a surface
a bit for enlarging the upper part of a hole
To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore
The tool with which a counterbore is machined
A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head
A kind of pin drill with the cutting edge or edges normal to the axis; used for enlarging a hole, or for forming a flat-bottomed recess at its mouth