Quality distinction

    Differentiating the quality of equipment bearings, we usually proceed from the following aspects:

    1, the packaging is not clear

    Double row tapered roller bearings

    Under normal circumstances, the brands that regulate the manufacturer's production are planned by a special planner for sliding bearings, and they organize the production and production of factories that meet the conditions for production. Therefore, the packaging of goods should be very strict from line to color. Clear and unambiguous.

    2, steel printing is not clear

    Each bearing commodity will have its brand name, standard composite bearing number printed on the bearing body. Although the font size is very small, the products that regulate the manufacturer's production are all stamped with the stencil printing technique and are pressed before the heat treatment. Therefore, although the font is small, it is dark and very clear. Under normal circumstances, the fonts of counterfeit goods are not only ambiguous, because the printing skills are rough, the fonts float on the outside, and some of them can easily be wiped off by hand. Perhaps the traces of the craft are severe.

    3, is there any noise

    The left hand grasps the bearing body sleeve, and the right hand reciprocates the jacket by a small amount to rotate it. It is not unnatural to hear the bearing running. Because of the production of most counterfeit goods

    Backwards, thorough craft workshop-type operation, in the production process, the bearing body is inevitably mixed with impurities such as dust and sand, so when the bearing rotates, the noise may appear unreliable. This is the discrimination

    Whether the product is a product of a strict manufacturer's specifications and is the key to the branded product that is operated by the manufacturer.

    4, appearance

    Is the appearance of dirty oil traces? This requires us to pay special attention when purchasing imported bearings. Because the domestic anti-rust skills and the leading foreign countries have a certain difference

    From the distance, it is easy to leave thick oil traces on the bearing body when it is subjected to rust-proof treatment, and when it is touched by hand, it feels thick and sticky, and foreign imported bearings do not see any traces of rust-proof oil. According to insiders,

    Extraordinarily careful people can smell a special flavor on imported bearings, which is the taste of rust preventive oils.

    5, the chamfer is not uniform

    The so-called chamfering of the bearing, that is, the intersection of the horizontal surface and the vertical surface, counterfeit bearing products because of the constraints of the production of skills, in these corners of the corner of the treatment is not satisfactory, this we can easily distinguish.

    6, packaging

    Bearing packaging packaging and packaging

    After the bearing is finished and passed the inspection, it will be cleaned and rust-proofed, and then put into the inner package to reach the quality and accuracy of waterproof, moisture-proof, dust-proof, impact-proof, bearing protection and convenience of use and sale. .

    Bearing inner packaging is divided into three types according to the rust prevention period:

    1 Short rust-proof packaging: The rust-proof period is 3 to 6 months. It is suitable for bearings that are delivered to the same subscribers in large quantities and put into use in a short time. After the agreement of both parties, the principle of convenience is adopted and simple packaging is adopted.

    2 Normal Rust-proof Period Packaging: The rust-proof period is one year and it is suitable for bearings that are usually used.

    3 long rust-proof packaging: rust-proof period of two years, suitable for special and fine bearings.

    The bearing inner packing materials include polyethylene plastic tube (box), kraft paper, plain and wrinkle polyethylene composite paper, carton, polyethylene or polyethylene plastic film, nylon fastening tape or plastic braided fastening tape, waterproof high-strength plastic tape. , linen bags and so on. The above materials are required to ensure that the data of the corrosion resistance test qualified.