Identify the quality of equipment bearings, we usually from the following aspects
Outer packing is clear double row tapered roller bearings in general, the regular manufacturers of the brand have their own special designers external packaging design, and arrange the production conditions pass the factory for production, therefore, the packaging of products from the line to the color blocks should be very clear, unequivocally.
Whether the steel print is clear
Each bearing product will be printed on the bearing body with its brand name, label, etc.Although the font is very small, but the regular manufacturers of the products are used in steel printing technology, and before the overheating treatment on the press, so its font although small, but deeply concave, very clear.Often, the fakes' fonts are not only blurry, but because of rough printing techniques, they float on the surface, and some can even be easily erased by hand or badly marked.
Is there any noise
The left hand holds the inner sleeve of the bearing, and the right hand rotates the jacket by reciprocating with small amplitude. Listen to whether there is noise in the running process of the bearing.Due to the backward production conditions of most counterfeit products, completely manual workshop operation, in the production process, the bearing body will inevitably be mixed with dust, sand and other impurities, so when the bearing rotation will appear noise or not smooth operation phenomenon.This is the key to determining whether a product is from a licensed manufacturer with strict manufacturing standards and is operated by a machine.
Whether there is a muddy oil stain on the surface
Whether there is a muddy oil stain on the surface requires us to pay special attention when buying imported bearings.Due to the domestic rust prevention technology and foreign advanced manufacturing countries still have a certain gap, so it is easy to leave thick oil traces when the bearing body rust prevention treatment, feel sticky and thick when touching with the hand, and foreign original imported bearings can hardly see any traces of rust prevention oil.According to insiders, those who are especially careful can smell a special smell on imported bearings, which is the smell of anti-rust oil.
Whether the chamfering is uniform
The so-called bearing chamfering, that is, the intersection of horizontal and vertical surface, counterfeit bearing products due to production technology limitations, in these corners of the parts are not satisfactory, which we can easily identify.
Bearing the packing
After the bearing is manufactured and inspected, it shall be cleaned and rust-proof, and then put into the inner package to achieve the purpose of waterproof, moisture-proof, dust-proof, shock-proof, maintenance of the quality and precision of the bearing as well as convenient use and sales.
The inner packaging of bearing is divided into three categories according to the rust-proof period:
(1) short rust-proof packaging: rust-proof period of 3 ~ 6 months, suitable for large quantities of delivery to the same subscriber, put into use in a short period of time.By mutual agreement, simple packing is adopted for convenience of use.
(2) general rust-proof packaging: rust-proof period of one year, suitable for general use of bearings.
(3) long rust-proof packaging: rust-proof period of two years, suitable for special and precision bearings.
Bearing inner packaging materials are polyethylene plastic tube (box), kraft paper, plain and wrinkle polyethylene composite paper, paper box, polyethylene or polyethylene plastic film, nylon fastening belt or plastic system fastening belt, waterproof high strength plastic belt, gunny bag, etc.All the above materials shall be qualified in corrosion resistance test.