It works, however I would rather use a steel tube instead of copper and tack weld the tube on the drill and make it where the tack welds can be cut off easily because a drill shrinks overtime due to sharpening. If you have to drill a bunch modern insert drills are the way to go with through coolant.
Clever
It works, however I would rather use a steel tube instead of copper and tack weld the tube on the drill and make it where the tack welds can be cut off easily because a drill shrinks overtime due to sharpening. If you have to drill a bunch modern insert drills are the way to go with through coolant.