history:

The development of the world's bearings has gone through three stages, among which it has experienced many difficulties and obstacles, and finally achieved the glory of the bearing industry.

The world's bearing industry rose from the late 19th century to the early 20th century. In 1880, the United Kingdom began to produce bearings. In 1883, Germany established the world's first bearing company (FAG George Schaffer). In 1889, the United States opened the ND bearing factory (now the General Motors Bearing Company's new Dibo Bridge Hite Bearing Department) Other large bearing companies in Europe and America basically laid the foundation for today in the early 20th century. After the Japanese bearing industry was formed in Europe and the United States, Swedish SKF company provided samples to Japan in 1910, making "bearings" appear for the first time in Japan alone. Since then, Japan's NSK, NTN and other bearing companies have been established in 1914 and 1918. The bearing industry of the third world countries started later, and it is in a relatively backward situation like its entire science, technology and machinery industry. 
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Generally speaking, the formation and development of the world's bearing industry has roughly gone through three stages:

The first stage, the initial stage of the world's bearing industry, is from the late nineteenth century to the early twentieth century. At that time, although the invention and application of bearings had been in existence for some time, the industrial production of bearings had just started from scratch, and it was just starting to be quite naive. The main features are:

1. The scale of production is extremely small, a large factory has only a dozen people to hundreds of people, and the daily output is only a few sets to hundreds of sets, which belongs to manual workshop production;

2. The equipment is simple, the technology is backward, and most of them are produced based on experience;

3. The material is mainly carbon steel, the accuracy is not high, but the price is expensive;

4. There are very few varieties, and their uses are very limited. At that time, bearing production technology was only in the hands of a few companies such as the United Kingdom, Germany, Sweden, and the United States. 
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Identify true and false:

The stamp is clear

Each bearing product will have its brand name, label, etc. printed on the bearing product body. Although the font is very small, the products produced by regular manufacturers are printed with steel stamping technology, and they are pressed before being heat-treated. Therefore, although the font is small, it is deep and very clear. In general, the fonts of counterfeit products are not only fuzzy, but because of the rough printing technology, the fonts float on the surface, and some can even be easily erased by hand or have serious hand marks.

Whether it is noisy

Hold the bearing inner sleeve with your left hand, and rotate the outer cover slightly with your right hand to make it rotate. Listen for the noise during the operation of the bearing. Due to the backward production conditions of most counterfeit products and completely manual workshop operation, impurities such as dust and sand will inevitably be mixed into the bearing body during the production process, so there will be noise or unsmooth operation when the bearing rotates . This is the key to judging whether the product comes from a brand product of a regular manufacturer that has strict production standards and is operated by a machine. 
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