As modern machinery and equipment bearing the dominant components, its main function is to support the sliding bearing mechanical rotating body to reduce equipment in the transmission process mechanical load coefficient of friction. Axial angular contact ball bearings bearing as a member of the family, is mainly used for precision machine tool spindle, usually with double row cylindrical roller bearings are used together with, it can withstand two-way axial load, with high precision, good rigidity, low temperature, speed high, easy assembly and disassembly. The following information about your leg muscles to push the purchase to identify quality bearings.
Push to identify quality angular contact ball bearings, we have the following methods:
Identify a quality: internal and external packaging to distinguish
Packing: regular manufacturers thrust angular contact ball bearings in general packaging composite bearing case has its own special design personnel outsourcing design, production conditions and arrangements for clearance of factory production of production, therefore, in terms of product packaging lines to color should be very clear and unambiguous.
Inner packing: factory manufacturing finished and after passing inspection, will thrust angular contact ball bearings for cleaning and anti-rust treatment, then placed inside packaging. Bearing packaging rust period is divided into three categories according to:
① short antirust packaging: rust period of 3 to 6 months for large volume shipments to the same subscriber, the short term will be put into use within the bearing. By mutual agreement, in order to facilitate the use of the principle of using simple packaging.
② general rust period packaging: rust period a year suitable for general purpose bearing.
③ long rust period packaging: rust period of two years, applies to private and precision bearings.
Packaging material bearing multiple nylon fastening tape or plastic preparation fastening with waterproof high-strength plastic tape hessian bags and so on.
Quality distinguish two: Axial angular contact ball bearings Seal word is clear
Each thrust angular contact ball bearing products will be printed on the body of products bearing its brand words, numerals and the like. Font is very small, regular manufacturers of products are used stamp printing technology. Before heat-treatment is carried out without the word pressure, a deep concave font is very clear. And under normal circumstances, counterfeit products fuzzy fonts, printing technology since the rough Font floating on the surface, some counterfeit products can be easily printed font hand erased.
Quality identify three: whether thrust angular contact ball bearing hetero ring
Left hand holding the thrust angular contact ball bearing sleeve body, right hand toggle coat small amplitude reciprocal rotated, listen to the bearings during operation if there hetero ring. Most counterfeit goods production conditions behind completely manual mill operation, in the production process will inevitably bearing the body braced dust, impurities such as sand, so the bearing rotation when there will be a hybrid ring or does not run smoothly phenomenon. This is to determine whether a product by strict production standards, and the regular operation of the machine with the key manufacturers of branded products.
Quality distinguish four: whether thrust angular contact ball bearing smooth surface
Are Axial angular contact ball bearings muddy surface traces of oil which requires that we should pay special attention to when buying imported bearings. It is easy to leave a thick oil stains due there is a certain gap between domestic and foreign advanced technology of rust country of manufacture, so the bearing body rust treatment, feel sticky thick sticky when touched by hand, and foreign original imports bearing hardly see any traces of anti-rust oil. According to insiders, particularly careful person can smell on bearings to a special taste, this is the anti-rust oil taste.
Quality distinguish five: Axial angular contact ball bearing is uniform chamfer
The so-called thrust angular contact ball bearing chamfer, which is the junction with the vertical plane of the horizontal plane, bearing counterfeit products due to the limitation of production technology, in which the corners of the site handled unsatisfactory, which we can easily distinguish.
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