Counter boring: Counter boring is the operation of enlarging one end of an existing hole concentric with the original hole with square bottom. It is done to accommodate the heads of bolts, studs and pins. The cutting edges of the … Continued
Reaming: The holes that are produced by drilling are rarely straight and cylindrical in form. To produce accurate and smooth holes, the drilled holes are reamed by a tool called reamer. The reamer is a cutting tool having several cutting … Continued
Boring: Boring is the operation of truing and enlarging a previously drilled hole by means of a single point cutting tool. Boring is done on drilling machine to perform the following tasks on a hole already drilled: Last Updated: Wednesday, … Continued
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