The different types of  metric taps and their characteristics

Published On December 29, 2017 | By Raymond Shaw | Technology

The metric thread taps and dies are indispensable to the manufacturing industry. In fact, history has proved that the Allied Group had provided protection to the company manufacturing these dies during the II World War. This company was the only manufacturer of these dies in the world at that point in time.

The usage:

By this time, everyone knows that the nut is the female part whereas the screw constitutes the male angle. Therefore, for a perfect fit, the screw should have the threads on the outside and the nut on the insides. The UN thread taps have a use for carving out the grooves and threads inside the nut whereas the thread dies to do the same for the screws.

The characteristics:

These are thread cutting tools. Therefore, one can expect them to be very hard. Usually, you would find the Trapezoidal thread taps having the maximum usage. These tools have utility in carving out the threads on soft metals like aluminum. You can also use the same for threading the plastic and the PVC pipes as well.

The hand taps are very common in the industry. When we say the hand taps, we mean the taps operated manually. Today, every industry believes in automation. Therefore, the machine taps are also becoming popular nowadays.

Different kinds of taps and dies:

The basic principles of these cutting tools are the same. The measurement and pitch undergo a change depending on the country of use.

The BSP taps and dies have used in Britain and other countries that have been under British rule such as India, etc. These countries follow the metric system. Hence, you would find the use of the metric taps and dies in these countries. The trapezoidal thread taps and dies are common in these countries as well.

At the same time, the USA and other countries in the neighborhood do not follow the metric system. They use the UN thread taps for the manufacture of their tools. The only difference would be in the pitch of the thread. Therefore, you can find that the screw manufactured using this system would not fit properly with the nut from the British system and vice versa. The ACME thread taps have used in the aircraft industries.

Normally, you would have to use the screw in a clockwise direction to secure into the nut. However, in the case of the automobile axles, you would find that you have to make a clockwise movement on one side and an anticlockwise movement on the other. You have to do this to maintain the stability of the wheels. This brings us to the concept of the left-hand tap and the right-hand tap. They require different kinds of treatment at the time of carving out the taps.

The pipe taps are the tapering taps. You require the tapering to lend a degree of stability to the connection. This would ensure that there would be no leakage of the liquid flowing through the pipe. The joints require lubrication to prevent any corrosion that would make the disassembly of these pipes impossible.

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