Bearing quality testing, there are two standard parallel situation, and "Z labeled" high quality grade bearings, may not have a good quality performance when "V standard" test, there is no correspondence between the two. This is to pay special attention in the quality inspection of the bearing. KOYO bearing detection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller bearings. Bearing detection method. Domestic bearing manufacturers product quality analysis reference (by actual test statistics, the premise of ensuring genuine). ① deep groove ball bearings: Wafangdian Bearing Company, Harbin Bearing Company, Luoyang Bearing the performance of the company's product quality is still good. ② Cylindrical roller bearings: better quality, Zhejiang Tianma Bearing Company. ③ Tapered roller bearings: After the actual detection experiments and visited the State Quality Inspection Center of bearings, bearing only the quality of the domestic money flows Zhejiang Wanxiang Group and Fujian Yu Siu Group's fair. ④ angular contact ball bearings: bearing quality Harbin bakelite stand still. 2, the domestic bearing quality testing analysis, bearings quality testing analysis KOYO bearing inspection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller series bearings imported bearings quality inspection, the Japanese models genuine bearing quality is still good; but found that the quality of a famous bearing is not ideal, because the country is not the company bearing basic local production. In nominal origin of the grade bearing detection Malaysia and Australia found that its quality is far from ideal, even as regular domestic manufacturers of genuine bearings. Tip: the various forms of double-row rolling bearings and pure axial thrust bearing is no corresponding national testing standards. For angular contact ball bearings to meet the requirements in the axial load, can refer to the quality level of the deep groove ball bearings. Professional installation of bearings installed correctly, affecting accuracy, longevity, performance. Therefore, the design and assembly departments to fully study the bearing installation. I hope to be in accordance with the operating standards for installation. Operating standards of the project generally as follows: (1), cleaning bearings and related parts (2), size and finishing the inspection related components (3), installation (4), installation check the bearings after (5), supply Lubricants hope just before installation, just open the bearing package. General grease lubrication, not clean, direct filling grease. Lubricating oil, do not have general cleaning, but the equipment used or high-speed bearings, etc., to use clean wash oil to remove the coating on the bearing rust. Remove the bearings rust inhibitor, rust, so you can not be placed aside. Furthermore, grease sealed bearings have not cleaned directly. Bearing installation method, because the bearing structure, with the condition varies, generally, due to multi-axis rotation, so the inner need interference fit. Cylindrical bore bearings, multi-purpose press push, or fitted with a thermal method. Cone occasions, mounted directly on the shaft taper, or sleeve installation. When mounted to the housing, with the more general clearance, interference of the outer ring, usually pressed into the press or shrink fitting method is also cooling installation. With dry ice as coolant, shrink fit mounting occasion moisture in the air will condense on the surface of the bearing. Therefore, the need for appropriate corrosion protection. Maintenance of the bearing and fully maintain its long-term performance should be really good regular maintenance (periodic inspection). Through appropriate periodic inspection, failure to achieve early detection, to prevent accidents in the first place, to improve productivity and economy is very important. Bearing custody at the factory are coated with anti-rust oil and use the right amount of rust-proof paper packaging, as long as the packaging is not damaged, the quality will be guaranteed. But long-term storage, to be less than 65% humidity, the temperature is about 20 ℃ under the conditions of storage on a shelf above the ground 30cm appropriate. In addition, the storage place should avoid direct sunlight or contact with the cold wall. Cleaning will remove the bearing inspection, the first recorded appearance with good photography and other methods. In addition, to confirm the remaining amount of lubricant and lubricant samples, and then cleaning bearings. a, bearing coarse washing and cleaning of fine washing, and at the bottom of the container used in the metal grid. b, coarse wash, brush, etc. used in the oil or grease clear adhesive material. At this point, if the rotation bearings in oil, foreign bodies, such as damage due attention to the rolling surface. c, sperm washing, in the oil slowly rotating bearings shall be careful. Often used as a neutral cleaning agents without water diesel or kerosene, is sometimes necessary to use warm lye. No matter what kind of cleaning agent used, filter should always be kept clean. After cleaning, immediately bearing grease coated anti-rust oil or rust. Check with the judge to determine whether to remove the bearing re-use, check its size to focus on accuracy, precision rotation, internal clearance and with the surface, raceway, cage and ring. Large bearings because they can not rotate by hand, pay attention to check the rolling body raceway, cage, and other exterior wall surface, the higher the importance of bearing more careful examination is required. On the test results, can be judged by those accustomed to bearing or bearings proficient. Analyzing standard mechanical properties and the degree of importance according to the check period and the like vary. If the following injury, bearings must not be reused and must be replaced. 1) fracture and defect bearing components. 2) things rolling raceway surface stripping. How to ensure reliable operation of the bearing angle from the use of speaking in general should pay attention to the following points: 1. Bearing clearance should be appropriate, too large an impact, too small, poor lubrication, may Burnt; 2. Bearing and journal surface quality and geometry should be strictly guaranteed; 3. Pressure to improve the lubrication quality, control oil, temperature and flow, strengthen the oil filter; 4. Using compliant fuel oil and lubricants. Rolling Rolling fever causes and Remedy (1) Reason: low precision bearings Methods: specified levels of precision bearings. (2) reasons: Spindle bore a different mind bending or box method: fix the spindle or box. (3) The reason: the belt too tight: Adjust the belt so that the proper tightness. (4) The reason: poor lubrication methods: use specified grade of lubricating material and properly cleaned. (5) The reason: Low method assembly quality: improving assembly quality. (6) The reason: the bearing housing laps: Replace worn bearings and related components. (7) axial force is too large: Clean, align the seal ring clearance requirements between 0.2 ~ 0.3mm, hole diameter impeller balancing corrections and check static equilibrium value. (8) bearing damage: replace the bearings. Caster bearing casters application is very broad, almost any design industries. According to the needs of different industries, people continue to invent all kinds of casters in the world there are about 150,000 kinds of different casters used in various industries. For casters bearing casters are very important. Bearing casters use a good variety, and without it, the caster will lose value. Therefore, we recommend the ideal bearing should be suitable for their applications, and to ensure the necessary safety margin left. In addition to the round surface, the diameter of the wheel bearing and the rotating wheel bearing casters can only determine the mobility, or the quality of the caster only. For different environments and have different requirements: the factory with casters Unlike firms with casters, tool cart with casters Unlike light casters hospital bed use, shopping carts with the requirements of casters certainly completely different from those factories those castors for transporting the heavy load. Generally, there are four bearings: 1, Patel spiritual bearings: Patel Ling is a special plastic, suitable for wet and corrosive locations, general rotation flexibility, greater resistance. 2, roller bearings: After heat treatment roller bearings can carry heavier loads, rotation flexibility in general. 3, ball bearings: high quality ball bearings made of steel, can carry heavier loads, for applications that require flexible rotation and quiet occasion. 4, plane bearings: suitable for high and ultra-high load and high speed applications. Fourth, rust resistance and finished products in order to avoid erosion of the bearing parts rust processing, deposit and application process, request bearing steel should have good rust resistance. Spherical ball bearings is actually a variant of deep groove ball bearings, is characterized by its outer diameter surface of the sphere, can be equipped into the corresponding concave spherical bearing self-aligning effect. Although its basic properties and deep groove ball bearings should be similar, but because most of the bearings used in the rough mechanical, the installation location is not precise enough, the hole axis and the seat of the neutral difference, or the long axis deflection such as the case of large, but their accuracy is not high enough bearing some rough structure, so the actual performance comparison of the performance of the same size deep groove ball bearings play a considerable discount. For example: spherical ball bearings with the top wire is applied to large stiffness difference deflection through shaft, the bearings with seals on both sides, can be tight to prevent dirt intrusion, had filled with the right amount of lubricant at the factory before installation without cleaning , no additional lubricant, the top end of the wire protruding screws on the bearing inner ring in the shaft when tightened. permissible axial load should not exceed 20% of the rated dynamic load. With eccentric outer spherical ball bearings and spherical bearings performance with the top wire of the same, just not on the top of the inner wire, but in the eccentric sleeve. Bore tapered bore spherical ball bearings with 1:12 tapered bore taper, can be installed directly on a tapered shaft, or with an adapter bushing is mounted on the shaft shoulder axis, and fine-tune the bearing clearance. Spherical ball bearings priority for applications that require simple equipment and spare parts occasions, such as for agricultural machinery, transportation systems or construction machinery. Mainly used to bear radial load mainly radial and axial joint load, generally should not alone bear the axial load, such a bearing inner ring can be installed separately (with full set of rollers and cage) and the outer ring. This kind of bearing does not allow the tilt axis relative to housing in the radial load appointments will produce additional axial force. This kind of bearing axial clearance of the size of the bearing can work properly when the axial clearance is too small, the higher temperature; larger axial clearance, bearing easily damaged. Therefore, installation and operation of special attention to adjust the bearing axial clearance, if necessary, preloaded mounting to increase the rigidity of the bearing. Foreign species spherical ball bearing is a bearing unit combining rolling bearing and the bearing together. Most of spherical ball bearings are made of spherical outer diameter, installation and bearing bore together with a spherical structure forms, versatility and interchangeability. Meanwhile, in the design of these bearings also has a certain Mind, easy to install, has a dual structure of sealing device can operate in harsh environments. Bearing casting is generally used. Common blocks are vertical seat (P), a square seat (F), Boss Square Block (FS), Boss round seat (FC), diamond-shaped seat (FL), an annular seat (C), slide seat, etc. ( T). LNSERTED heart and ball bearings into the bearing housings, bearing in mind it is called is a plus bearing titles, such as set screws with spherical bearings UC205 with Vertical Block said UCP205. LNSERTED has a strong bearing due to the interchangeability, bearing in mind the same specifications can be freely assembled bearing in different shapes. Vertical Block outside outside outside outside outside outside the spherical ball bearings, spherical ball bearings with a square seat with diamond-shaped spherical ball bearing with convex circular annular spherical ball bearings with spherical ball bearings, spherical ball bearings with a slider seat belt hanging hanging outside the seat belt hanging outside the spherical ball bearings, spherical ball bearings style seat with adjustable seat outside the outer spherical ball bearings with diamond stamping spherical ball bearings with other seat spherical ball bearings, spherical ball bearings, spherical disassembly 390000 Series by eccentric bearing is the bearing inner ring and the shaft is fixed, the eccentric sleeve socket head cap screws from tightening effect. Maintenance, many machines are not dismantling the bearings hand, it is necessary to introduce the disassembly 390000 series spherical ball bearings techniques and precautions: Removing a spherical ball bearings with a hex wrench to loosen the first eccentric sleeve bearing locking screws, and then insert a small iron bar sink hole cover eccentric sleeve, against the direction of rotation of the eccentric shaft to play loose. 2 Loosen the bolt housings. Together with the bearing housings removed from the shaft. Note Before the end of the demolition of the shaft bearing. Should the other end of the shaft bearing bolts loosened in order to avoid each other at both ends of the bearing strength and damage. Installation 1. Before installation into the shaft bearing, you must unplug the fixed pin bearing jacket, while the journal surface clean and smooth polished and coated rust and lubricating oil in the journal at (allows the bearing on the shaft slightly rotated) . 2 in the bearing and bearing with lubricant topcoat, the bearing into the bearing. Then the assembled bearing and housing units along the shaft. Pushed to the desired location for installation. 3 fixed bearing bolts do not tighten, let jacket bearing in the housing can rotate. Also installed the other end of the same shaft bearings and the seat of the shaft a few times, so that the bearing itself automatically find the positive position. Then bearing bolt is good. 4 mounted eccentric. Eccentric condom on the first step in the eccentric sleeve bearing, along the axis of rotation and hand tighten. Then insert a small iron bar or withstand eccentric sleeve sink holes. Direction along the axis of rotation of the hand percussion hammer small iron. eccentric sleeve securely installed, and finally locking hex screw eccentric sleeve. Spherical ball bearings, spherical ball bearings classified in accordance with the method of co-axis can be divided into three categories: one, with the top wire, spherical ball bearings which code is: UC200 Series (light series), UC300 Series (heavy series) , and distortion product UB (SB) 200 series, if the use of the environment fit smaller, usually pick UC200 series, otherwise choose UC300 series. Typically the top wire, spherical ball bearings are two, its angle of 120 °, its feature is used when working with the top wire axis to the top of the shaft, and then play the fixed effects, but their cooperation environmental requirements necessary for small-scale oscillations. This match throughout the spherical ball bearings, widely used in textile machinery, ceramic machinery and other production career. Second, spherical ball bearings with a tapered codenamed: UK200 series, UK300 series. Such spherical ball bearing inner diameter of 1: 12 share of the taper hole, to cooperate with the tight sets use when exercising such a spherical ball bearings features as: the ability to accept than with the top wire, spherical ball bearings greater loads. Due to cooperate with the same type of tight sets with the top wire than the inner diameter of the spherical ball bearings [1] smaller, for example, with an inner diameter of the top wire, spherical ball bearings UC209 is 45mm, and its cooperation with the use of shaft diameter of 45mm , but if if replaced with taper spherical ball bearings, it can only pick an inner diameter of 45mm adapter sleeve, and cooperation with 45mm tapered adapter sleeve, spherical ball bearings only UK210 (of course higher if fit then able to pick UK310's). Thus, UK210 acceptable fit when you want to make larger than the UC209 more. Third, with partial pain outer spherical ball bearing its code is: UEL200 series, UEL300 series, SA200 Series. Such spherical ball bearings on one end of the primary characteristics of migraine pain bearing inevitable degree, have the same degree of migraine pain, migraine pain sets to work with. Such bearings can also be said to be special bearings, first and foremost because of its use in agricultural machinery (harvesters, straw machines, threshers, etc.) on top of such spherical ball bearings used on strong beats match the layout, migraine pain Cooperation layout can be useful to cut the strong beat. There are other types of bearings shop, welcome to buy! Bearings 1. Rolling classified by type of structure (1) can bear the load bearing their direction or nominal contact angle is divided into: 1) radial bearings ---- mainly used to bear radial load bearing, its nominal contact angle from 0 to 45. Nominal contact angle is different, is divided into: radial contact bearings ---- nominal contact angle of zero radial bearings: Radial angular contact bearings ---- nominal contact angle greater than the centripetal 0-45 bearings. 2) thrust bearing ---- mainly used for axial load bearing, its nominal contact angle greater than 45-90. Nominal contact angle is divided into different: axial contact bearings ---- nominal contact angle of 90 thrust bearings: Axial angular contact bearings ---- nominal contact angle greater than 45 but less than 90 of the thrust bearing. (2) the type of rolling element bearing their divided into: 1) ball bearing ---- the ball rolling: 2) ---- rolling roller bearings for the rollers. Roller Bearing press roller types are divided into: cylindrical roller bearings ---- rolling body is cylindrical roller bearings, cylindrical roller than the length and diameter of less than or equal to 3; needle bearing ---- rolling body is needle bearings, needle length and diameter ratio greater than 3, but the diameter is less than or equal to 5mm; tapered roller bearings ---- rolling body is tapered roller bearings; aligning roller bearings eleven rolling body is spherical roller bearings. (3) ability to adjust their work bearing heart, divided into: 1) aligning bearing ---- raceway is spherical shape, able to adapt to the two raceways angular deviation between the axis and bearing angular motion; 2) Non-aligning bearing (rigid bearing) ---- Can impedance between the axis line roller bearing angular offset. (4) by the number of rows of rolling elements bearings, divided into: 1) single row bearings ---- has a column bearing rolling elements; 2) ---- double row bearings with two rows of rolling element bearings; 3) multi-column more than two rows of rolling elements bearings ---- have, such as three-column, four-row bearings. (5) whether the separation bearing their part, are divided into: 1) separable bearings ---- bearings with separable parts; 2) can not be separated after the final bearing ---- bearings supporting rings are not arbitrarily Freedom separation bearings. (6) bearing their structure and shape (if no slot loading, the presence or absence of the outer ring and the ring shape of the structure, wall, or even whether the cage, etc.) can also be divided into a variety of structural types. 2 Press the rolling bearing outside diameter size classification bearing their size, divided into: (1) miniature bearings ---- nominal diameter size range of 26mm or less bearing; (2) small bearings ---- nominal diameter size range of 28-55mm bearings; (3) small and medium sized bearings ---- nominal diameter size range of 60-115mm bearings; (4) medium and large bearings ---- nominal diameter size range of 120 - 190mm bearing (5) large bearing ---- nominal diameter size range of 200-430mm bearings; (6) large bearings ---- nominal diameter size range of 440mm or more bearings. Flange bearing flange with 5 types of flange bearing flange bearing outer class. Feature is to simplify the structure of the host, reducing the size of the host, making it easier to locate bearings, spherical bearings, spherical ball bearings class is actually a variant of deep groove ball bearings, is characterized by its outer diameter surface of the sphere, can be equipped with played into the corresponding concave spherical bearing self-aligning effect. Needle Roller Bearings Needle Roller Bearings class with thin and long roller (roller length of 3 to 10 times the diameter, the diameter of generally not more than 5mm), and therefore radial structure is compact, its diameter size and load bearing capacity and other types phase, minimum diameter, especially for restricted installation dimensions supporting structure in the radial ball bearings Self-aligning ball bearings: between two spherical outer ring and the inner ring raceway raceway for the assembly of a drum shaped roller bearings. Outer ring raceway curvature center and bearing center line, so has the same self-aligning ball bearing self-aligning feature. Deep groove ball bearing deep groove ball bearings imported bearings are mainly used for pure radial load, but also to support radial and axial load. Spherical roller bearings have two raceways between the inner and outer ring raceway is spherical, assembly of the drum-shaped roller bearings. Thrust roller bearings are rolling roller thrust bearing. Linear bearings Thrust cylindrical roller bearings rolling body is cylindrical roller thrust bearing. Thrust tapered roller bearings: rolling body is tapered roller thrust bearing. Thrust needle roller bearings rolling body is thrust bearing. Thrust spherical roller bearings rolling body is convex or concave spherical roller thrust bearing. Convex spherical roller bearing ring raceway spherical shape, a concave spherical roller bearing shaft ring raceway spherical shape. An assembly seat belt bearing radial bearings and pedestal combined, in line with the bearing axis parallel to the support surface of the base plate mounting screws. Joint bearing sliding contact surface of the sphere, mainly applied to the swing motion, tilt and rotational movement of the spherical plain bearings. Portfolio bearing a bearing while a combination of two or more of these forms bearing structure made of rolling bearings. Such as needle and thrust cylindrical roller bearings, needle roller and thrust ball bearings, needle roller and angular contact ball bearings. Plain bearings sliding bearings, regardless of inner and outer rings and no rolling, usually made of wear-resistant materials. Commonly used in low-speed, heavy and filling oil and difficult to maintain mechanical rotating parts. Bearing six called the mill bearing angular contact ball bearings are generally used to 36,46 represented bearing, angular contact is generally 15 degrees, 25 degrees, 45 degrees and so on. Outside the outer spherical ball bearing type spherical ball bearings, spherical ball bearings with vertical seat pedestal with a square outside the outer outer spherical bearings, spherical ball bearings with a diamond-shaped seat with convex circular spherical ball bearings, spherical ball bearings with annular seat belt outside the outer spherical ball bearing slide with a suspended spherical ball bearings with external style suspension seat with adjustable outer spherical ball bearings, spherical ball bearings outside the diamond-shaped seat with stamping spherical ball bearings with other seat thrust ball bearings, spherical angles contact ball bearing angular contact ball bearing contact angle is generally 60 ° commonly thrust angular contact ball bearings are generally two-way thrust angular contact ball bearings, mainly used for precision machine tool spindles, generally with a double row cylindrical roller bearings, together with the use, withstand axial load, with high precision, rigidity, low temperature, high speed, easy assembly and disassembly, etc.. Rolling addition to the above other structures. Identify the device to distinguish the quality of bearing quality bearings, we usually from the following aspects: 1, bearing the packaging is clear under normal circumstances, regular bearing manufacturers have their own special brand of external packaging designers to design and arrange production Conditions clearance factory production of production, therefore, whether the product packaging bearing should be very clear from the line to the color and unambiguous. 2, the bearing seal products bearing the word is clear every body will be in products bearing the words printed on its brand, label and so on. Although the font is very small, but regular bearing manufacturers of products using the technology stenciled lettering, but before the heat-treatment is carried out without the word pressure, so the font was small, but a deep concave, very clear. And usually, not only the fuzzy font counterfeit products, the printing technology roughness font floating on the surface, and some can be easily wiped off by hand or manually trace serious. 3, whether hetero ring bearing left hand holding the bearing sleeve body, right hand toggle coat a small margin to rotate back and forth, listening to the bearings during operation whether hetero ring. Since the conditions of production of counterfeit products bearing the most backward, completely hand-mill operation, bearing the body in the production process will inevitably be distracted by dust, sand, a class of impurities, so it will be rotating bearing ring hetero does not run smoothly or phenomenon. Bearing this point is to determine whether the product by strict production standards, and the key with the regular operation of the machine bearing manufacturers of branded products. 4, if there is muddy surfaces bearing traces of oil which requires that we should pay special attention to when buying imported bearings. It is easy to leave a thick smears Because there is a certain gap between domestic and foreign advanced technology of rust country of manufacture, so the bearing body rust treatment, sticky feeling when you touch the sticky thick, while the foreign original on imported bearings hardly see any traces of rust oil. According to insiders, particularly careful person can smell the bearings to a special flavor, which is anti-rust oil taste. 5, the so-called bearing chamfer chamfer is uniform, that is horizontal plane and the vertical plane of the junction, due to restrictions of counterfeit products bearing production technology, in which the corners of the site was unsatisfactory treatment, which we You can easily identify. 6, bearing package bearing package since the beginning of the packaging and packaging bearing in manufacturing finished and after passing inspection, the cleaning and anti-rust treatment, then put the package in order to achieve waterproof, moisture, dust, shock, maintenance quality and precision of the bearing and the purpose to facilitate the use and sale. Rust on the bearing inner packaging divided into three categories according to: ① Short rust of packaging: rust of 3 to 6 months, suitable for large-volume shipments to the same subscribers, will be put into use in the short term bearing. By mutual agreement, to facilitate the use of the principle, the use of simple packaging. ② general rust of packaging: rust period of one year for general purpose bearing. ③ long rust-proof packaging: rust of two years for special and precision bearings. Bearing polyethylene plastic tube packaging materials (boxes), kraft paper, plain and wrinkles polyethylene composite paper, cartons, polyethylene or polyethylene plastic film, plastic woven nylon fastening tape or fastening tape, waterproof high-strength plastic tape , sacks, etc. The above materials are required to ensure that the corrosion resistance of the material can test pass.