A tap drilling bit is a tool that's specifically designed to be used for tapping metalwork. The tapping technique creates a threaded hole that can be used to screw a threadedbolt. You can also use the attachment to repair or replace damaged fixings. A tap tool and a die tool can be used together to create external and internal threads.

A tap drill bit looks like a long bolt-thread and is inserted in a drill chuck to speed the process of creating an internal thread. These bits are often made of hardened, tungsten steel so that they can be used repeatedly to form threads from a wide range of metals. A tap drill bit is capable of making an internal thread. It can also form the female section for a coupling, which can be found in standard nuts.

A die bit can be used as a partner attachment for a tap drill. It is used for making an external thread, the male portion of a coupling. Tap bits or die bits are frequently paired to ensure correct coupling joining. Both types have numbering systems depending on the diameter of the threads created. This allows the creation of matching pair.

Metal machinists have three main types: the bottoming and intermediate tap drill bits, as well as the taper tap. The first, or bottoming tap, has a flathead with very little tapering on the tip to shaft. This tap drill bit can make a fully-threaded hole in metal. The hole will not leave the metal. A machine shop will use this type bit if it is not possible to use the flat bottom tap head.

Taper taps and taper taps have a tapered end that is more tapered than the bottoming tap. The intermediate tap tap is the most widely used tap drill bit. These bits are equipped with a tapered cutting tip that assists in aligning the threads. The taper bit taper has a greater degree of tapering than the intermediate bit. This makes it more suitable for use with more difficult materials, such steel alloy.