As an expert in the field of mechanical engineering, I have a deep understanding of various types of tools and their applications. When it comes to taps, which are essential for threading operations in manufacturing, there are several types that are commonly used. Taps are cutting tools used to create internal threads in a pre-drilled hole by cutting or forming a thread on the inside surface of the hole. This creates a female thread that can be mated with a corresponding male thread, much like how a nut fits onto a bolt. The three primary types of taps that are widely recognized and used by machinists are:


1. Straight Flute Tap: This is the most basic type of tap and is used for general-purpose threading. It has straight flutes that run the entire length of the tap, which allows for the efficient removal of chips from the hole. Straight flute taps are suitable for through holes, which are holes that go all the way through a piece of material. They are not designed to form a bottom of the thread, so they leave a slightly rough finish at the bottom of the hole.


2. Bottoming Tap: As the name suggests, a bottoming tap is designed to cut a thread all the way to the bottom of a blind hole, which is a hole that does not go all the way through the material. The flutes of a bottoming tap are shorter, and the end of the tap is ground to a specific shape that matches the desired thread form. This allows the tap to cut the thread accurately to the bottom of the hole, leaving a clean and precise finish.


3. Taper Tap (or Plug Tap): A taper tap is similar to a bottoming tap in that it is also used for threading blind holes. However, the cutting section of a taper tap is conical, with the largest diameter at the entrance of the hole and gradually decreasing towards the bottom. This design allows the taper tap to start cutting the thread from the bottom of the hole and work its way up, which can be beneficial in certain applications where a strong root section of the thread is required. Taper taps are also used when a precise fit is needed, such as in plumbing applications.

Each type of tap has its specific use case and is chosen based on the requirements of the threading operation. It's important to select the correct tap for the job to ensure the best results and to prevent damage to the tap or the workpiece.

Now, let's move on to the translation of the above information into Chinese.

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A tap cuts or forms a thread on the inside surface of a hole, creating a female surface which functions like a nut. The three taps in the image illustrate the basic types commonly used by most machinists: Bottoming tap or plug tap.read more >>