Drilling Machines

Tapping: Tapping is the operation for making internal threads in a hole by means of a tool called tap. The tap is essentially a bolt with threads cut on it. Last Updated: Wednesday, October 21, 2009

Spot facing: Spot facing is the operation of smoothing and squaring the surface around and at the end of a hole so as to provide a smooth seat for a nut or for the head of a cap screw. Spot … Continued

Drilling: Drilling is the operation of producing a hole by removing metal from a solid mass by the rotating edge of a cutting tool known as drill. Last Updated: Wednesday, October 21, 2009