How to identify the quality of bearings

   The identification of equipment bearing quality, we usually from the following aspects

   Whether the outer packaging is clear, double row tapered roller bearings under normal circumstances, the regular manufacturers have their own brand design personnel to design the outer packaging, and arrange the production conditions of the factory manufacturing production, therefore, the product packaging from the line to the color block should be very clear, unambiguous.

   Is the stencil legible

   Each bearing product will be in the bearing product body printed with its brand name, label and so on. Although the font is very small, but the regular manufacturers of products are using the stencil printing technology, and in the pre-heat treatment before the compression, so the font although small, but deep concave, very clear. In general, the fonts of counterfeit products are not only blurred, due to the rough printing technology, the font floating on the surface, some can even be easily wiped out by hand or hand marks are serious.

   Whether there is any noise

   The left hand holds the inner sleeve of the bearing body, and the right hand dials the outer sleeve in small amplitude to make it rotate, listening to whether there is any noise in the running process of the bearing. Due to the backward production conditions of most of the counterfeit products, which are completely operated by manual workshops, it is inevitable that impurities such as dust and sand will be mixed into the bearing body during the production process, so in the bearing rotation will appear when the noise or running is not smooth phenomenon. This is the key to judging whether a product comes from a well-established, machine-operated brand.

   Whether there is any muddy oil on the surface

   Whether there is a muddy oil on the surface of this need us to buy imported bearings should pay special attention. Because of the domestic rust-proof technology and foreign advanced manufacturing countries there is a certain gap, so the bearing body for rust-proof treatment is easy to leave a thick traces of oil, hand contact feel sticky thick, and the bearing imported from abroad can hardly see any traces of rust-proof oil. According to the introduction of the industry, especially careful people can be imported bearings on the smell of a special flavor, this is the smell of rust-proof oil.

   Bearing packing

   After the bearing is manufactured and tested to be qualified, it is cleaned and rust-proof, and then put into the inner packing, in order to achieve waterproof, moisture-proof, dust-proof, impact-proof, maintenance of the quality and accuracy of bearings and easy to use and sales purposes.

   The inner packing of bearings can be divided into three types according to the antirust period: 1 short antirust period packing: Antirust period 3-6 months, suitable for the bearings that are shipped in large quantities to the same subscriber and put into use in a short time. According to the agreement of both sides, the simple packing is adopted on the principle of convenience. 2 general rust-proof packaging: Rust-proof period of one year, applicable to general purpose bearings. 3 long antirust packaging: antirust period of two years, suitable for special and precision bearings. The packing materials for the bearing include polyethylene plastic cylinder -LRB-boxKraftraft paper, plain and wrinkled polyethylene composite paper, paper box, polyethylene or polyethylene plastic film, nylon fastening belt or plastic woven fastening belt, waterproof high strength plastic belt, gunny bag, etc. . All the above materials need to ensure the material's corrosion resistance test qualified.