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Thread Repair System--Delisert

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Development History Of World Thread

    Due to the functions of wire thread insert that is easy to be installed and removed, the wire thread insert is widely used in mechanical production. Thread product is one of the earliest simple mechanical inventions. In ancient times, people adopted thread to fasten armour, squeeze oil and brew wines and so on.

    However, thread was officially used in large quantities after the first industrial revelution. Because people in the UK invented screw spindle lathe,screw die and tap, which laid the technological foundation of producing thread parts in large quantities. In 1841, British people Whitworth came up with the first National Thread Standard, namely,Whitworth screw thread that laid a technological foundation of thread standard. In 1905, British people Tyler invented Tyler principle. From then on, The UK became the first country which completely mastered thread processing and detecting techniques, and inch thread, the originator for modern thread, is the earliest standard recognized worldwide, with the rising of the Sun Never Set, inch thread was widely promoted and used.

    The US, the up-rising star, developed on the basis of British Whitworth thread. After the second world war, it was the thread commonly used by the allies, and its code is UN. 

    The ordinary metric thread appeared later, its code is Metric thread, which is originated from the N thread in the US, which was widely used in Europe and China and factoredin ISO qualification.


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