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网址  2019-12-17  作者:admin    阅读:

To distinguish the quality of equipment bearings, we usually proceed from the following aspects:
1, is the outer packing clear?
Double row tapered roller bearings
Double row tapered roller bearing Atlas
Generally speaking, the brands produced by the regular manufacturers have their own special designers to design the outer packaging, and arrange the factories which pass the production conditions to produce. Therefore, the packaging of the products should be very clear and unambiguous from the lines to the color blocks.
2, whether the seal is clear or not?
Each bearing product will have its brand name, label and so on on the bearing product body. Although the font is very small, but the regular manufacturer of products are used in steel printing technology, and before heat treatment to press the type, so although the font is small, but concave deep, very clear. In general, the fonts of counterfeit products are not only blurry, because of the rough printing technology, the fonts float on the surface, and some can be easily erased by hand or hand marks serious.
3, is there any noise?
Hold the inner sleeve of the bearing with the left hand, and move the outer sleeve with the right hand to rotate. Listen to the noise during the operation of the bearing. Due to the backward production conditions of most counterfeit products and completely manual workshop operation, it is unavoidable to mix dust, sand and other impurities into the bearing body in the production process, so when the bearing is rotating there will be noise or not smooth operation. This is the key to judging whether the product comes from a regular manufacturer's brand with strict production standards and machine operations.
4, surface
Whether there is turbidity on the surface, we need to pay special attention when purchasing imported bearings. There is still a certain gap between domestic anti-rust technology and foreign advanced manufacturing countries, so it is easy to leave a thick oil stain when the bearing body is treated with anti-rust. It feels sticky and thick when contacted by hand, but almost no trace of anti-rust oil can be seen on the bearings imported from abroad. According to the industry, people who are particularly careful can smell a special smell on the imported bearings, which is the smell of rust-proof oil.
5, is the chamfer even?
The so-called chamfering of bearings, that is, the junction of horizontal and vertical surfaces, counterfeit bearing products due to production technology constraints, in these corners and corners of the edges of the processing is unsatisfactory, which we can easily distinguish.
6, packing
Bearing packaging is divided into inner package and outer package.
After the bearing has been manufactured and passed the inspection, it is cleaned and rust-proof, and then put into the inner packing to achieve the purpose of waterproof, moisture-proof, dust-proof, impact-proof, maintaining the quality and accuracy of the bearing, as well as convenient use and sale.
The inner packing of bearings shall be classified into three categories according to the rust prevention period.
(1) Short rust-proof period packing: rust-proof period 3-6 months, suitable for large-scale shipment to the same subscriber, short-term put into use of bearings. With the agreement of the two sides, simple packaging is adopted for the principle of convenient use.
2. General rust prevention period: the rust prevention period is one year, suitable for general purpose bearings.
3. Long rust proof packaging: rust prevention period of two years, suitable for special and precision bearings.
The packing materials in the bearing include polyethylene plastic cylinder (box), kraft paper, plain and wrinkled polyethylene composite paper, paper box, polyethylene or polyethylene plastic film, nylon fastening belt or plastic fastening belt, waterproof high strength plastic belt, linen bag, etc. All the above materials need to ensure that the corrosion resistance of the material is qualified.