high speed bearing Notes miniature bearings heating

1, the yoke is placed on the end face of the host.

2, insert the plug into a power outlet with a control switch on.

3, check the ground wire is good, after power with pencil tests.

4, press the start button, the host power.

5, check the yoke on the ground should be no voltage.

6, press the stop button hosts off, stop heating.

7, depending on the size of miniature bearings or other parts, choose a different yoke put, this yoke on the top surface of the host, should fit flat.

8, when heated miniature high speed ‍bearings, sensors Thrust Roller Bearings‍ should be inserted into the "sensor socket" and the sensor close to the workpiece is heated.

Solution seven miniature bearings overheating when

Miniature bearings fever due to various reasons, it is addressed in different ways, the following are workarounds for miniature bearings overheating when:

1, filling fat law, the so-called law is filled grease to the bearing surface regularly fill the right amount of grease, is one of the most commonly used grease lubrication.

2, oil cup, oil cup is set Capping Oil oily cup cup or pressure in the bearing housing, regularly rotating the cap gun grease or oil injection. This is also a common grease lubrication.

3, the pressure for fat France, France is relying on wind power bearing‍ pressure grease for grease pump for grease. You should choose good mobility grease.

4, centralized method for fat, centralized method for grease through grease pump, while the various deep groove ball bearings and other parts for fat. Similarly, when the grease should be used in mobile offerings and good resistance to oxidation and corrosion resistance of the grease, but also a pressure for grease method.‍

miniature ball bearings Wheel bearing (hub bearing)

Wheel bearing (hub bearing) primary role is to load and for the rotation of the hub to provide accurate guidance, both axial load and radial load, is a very important component. wind power bearing‍ Traditional automotive wheel bearing is composed of two tapered roller bearings or ball bearing combination, bearing installation, oiled, sealed and adjust the clearance is carried out in the car on the production line. This structure makes it difficult in a car assembly plant, high cost, poor reliability, and maintenance car maintenance, but also the need for bearing cleaning, oiling and adjustment. Developed on the basis of the hub bearing unit is the standard angular contact ball bearings and tapered roller bearings on, it will be two sets of bearings as a whole, with good assembly performance can be omitted clearance adjustment, light weight, Thrust Roller Bearings‍ compact structure, load capacity large, sealed bearings can advance into the grease, hub seals and maintenance advantages omitted from the outside wheel, has been widely used in cars, and in the truck also has a tendency to gradually expand the application.

LYHY flanged ball bearing Installation and Use

Car wheel bearings are used in pairs over a maximum single row tapered roller or ball bearings. With the development of technology, the car has been widely used car wheel unit. The growing scope and use of hub bearing unit, has now developed to the third generation: the first generation is composed of ball and roller combined bearing‍ a double row angular contact bearings. The second generation of the outer raceway for bearing a fixed flange ball bearing sleeve may simply be fixed with a nut on the axle. Makes the car maintenance becomes easy. The third generation wheel hub bearing units are using a bearing unit and ABS anti-lock brake system compatible. Wheel hub unit designed to have the inner flange and an outer flange, the flange is bolted to the drive shaft, the outer flange of the bearing mounted together. Worn or damaged wheel bearing or hub units will happen to your vehicle anachronistic and higher cost of failure in traveling the road, or even damage to your safety. Wheel bearings in use and installation Please note the following:

1, in order to ensure maximum safety and reliability, it is recommended that you no matter how long the age of the vehicle should always check the wheel bearings - note bearing for wear mobile crane bearing‍ early warning signals: including any friction noise when rotating or turning wheel suspension combination when the deceleration is not normal. Rear-wheel drive vehicle is recommended for the vehicle to 38,000 km is to deal with the front wheel hub bearing lubrication. When replacing the brake system, check the bearing and replace the seal.

2, If you hear noise emitted wheel bearing parts, first of all, it is important to find the location of the noise occurs. There are many moving parts may produce noise, but also may be some rotation member and the rotating member occurs without contact. If the confirmation is bearing noise, bearing may be damaged and need replacing.

3, because the front wheel bearing failure on both sides led to similar working conditions, so even if only one bearing bad, it is recommended to replace in pairs.

4, wheel bearing more sensitive, in any case need to adopt the right approach and the right tools. In storage and during installation, the bearing parts can not be damaged. Angular contact ball bearings‍ Requires a large number of bearings pressed into the pressure, so the need of special tools. Be sure to reference vehicle manufacturers instructions.

5, the installation of the bearing should clean environment, small particles from entering the bearing will shorten bearing life. When replacing bearings to maintain a clean environment is very important. Allowed to tap with a hammer bearing note bearing not fall to the ground (or similar improper handling). Before installing the shaft and the bearing housing should also check the condition of even a small amount of wear can also lead to poor fit, thereby causing early failure of the bearing.

6, on the wheel hub bearing unit, do not attempt to disassemble or adjust the wheel hub bearing seals unit, otherwise it would cause water damage to seals or dust from entering. Even ring and inner ring raceway are damaged, resulting in permanent failure of the bearing.

7, the ring is equipped with ABS unit has a magnetic thrust bearing ring, which thrust ring can not be a collision, impact or collision with other magnetic field. Remove from the box before wind power bearing‍ installation, so that they stay away from magnetic fields, such as the use of electric motors or electric tools. When installing these bearings, the road test by observing the dashboard ABS alarm pin to change the bearing operation.

high speed bearing 3 Maintenance Note

 1.equipped with ABS wheel hub bearing magnetic thrust ring, thrust ring mounted in order to determine which side, you can use a small light near the edge of something * high speed ‍bearings, magnetic bearings will be attracted by it generated. When installing a magnetic thrust will take the side of the ring pointing inside, is on the ABS sensor. Note: Incorrect installation may lead to functional brake system failure.

9, many of the bearings are sealed, this type double row ball slewing bearing‍ of bearing is not needed throughout the life of the grease increases. Other non-sealed bearings such as double row tapered roller bearings in the installation must be added grease. Because different lumen size of the bearing, it is difficult to determine how much of the added fat, the most important thing is to ensure that the grease bearing if too much fat, when the bearing is rotating, the excess oil will bleed. General Experience: During installation, the total amount of oil to account for 50% of the bearing clearance. 10, install the lock nut due to the different types of bearings and bearing housings, the size difference between the torque is great.

In the repair process, often found that some cars have a greater driving noise, no abnormal tire wear inspection, turn the wheels on the lift no abnormal sound. This phenomenon is often caused by abnormal wheel bearing damage caused by the so-called non-normal means of bearing damage caused by the installation ball and roller combined bearing‍ of. Automotive wheel bearings are generally double row ball bearing, at the time of installation of the bearing installation if you use a hammer percussion, or when the bearing is installed into the bearing inner race of the bearing by pressing installed, will cause one side of the bearing raceways damage. Noise when the vehicle is traveling, and when the wheelie is better since the raceway side, and therefore noise was heard. Correct installation operation is the key to long life bearings.

miniature ball bearings Precision bearings distinction

Precision bearings and plain bearings should be used to distinguish between the following points:

1, the size of the required value is not the same, high level of accuracy of the product of its size deviation (inside diameter, outside diameter, oval, etc.) than the fine

Value of the low level of product requirements to be smaller;

2, rotating accuracy requirement values ​​self aligning ball bearings‍ are not the same, high level of accuracy of the product of its rotational accuracy (internal diameter of the beating, beating the outer diameter of the end face of the raceway beating, etc.) than the value of the low level of precision to be strict product requirements;

3, the surface shape and surface quality requirements values ​​are not the same, high level of accuracy of the product on its surface shape and surface quality (or channel raceway surface roughness, circular deviation, ditch-shaped deviation) than the low accuracy level the value to be strict product requirements;

4, the accuracy of its products particularly high grade material than the material properties of the general levels of precision products more favorable.

Precision bearings in accordance with ISO double row ball slewing bearing‍ grading standards are divided into:. P0, P6, P5, P4, P2 successively higher grades, where P0 is the general accuracy and precision are other grade levels. Of course, different classification criteria, different types of bearings, their method for classifying different, but the meaning is the one to. Performance requirements on the use of precision bearings rotating body with high runout accuracy, high-speed, low friction and friction change.       

LYHY flanged ball bearing Methods to improve cooperation

In order to improve the accuracy of the actual mating bearing installation, you must not make use of measurement methods and tools bearing deformation of the flanged ball ‍bearing bore and the outer dimensions of the actual mating surface precision measurement, the measurement can be related agricultural bearings‍ to inner and outer diameters all items to be measured, and the right to make a comprehensive analysis of the measured data, as a data, precision worthy of the shaft and the bearing seat hole the size of the installation site. In the actual measurements made ​​with the corresponding dimension of the shaft and housing bore and geometry, the measurement should be carried out when the bearing at the same temperature.

In order to ensure a higher actual vertical mill bearing‍ match results, and the surface of the shaft and the bearing seat hole match, the roughness should be as small as possible.

In making these measurements, should be in the outer and inner bore of the bearing and the corresponding surface on the shaft and housing bore at both sides of the assembly near the chamfer, respectively, showing the maximum deviation can be made in two directions marked so in the actual assembly, so that the maximum deviation of the two sides match aligned in the same direction, so that after assembly, the two sides of the deviation can be partially offset.

The purpose of making two directional signs, that can compensate for deviations into account, even if the respective ends of the supporting improved rotational accuracy, and make spherical bearings‍ the two ends of the housing bore and between the journal bearing concentricity error partially eliminate . Implement measures to strengthen the surface of the mating surfaces, such as sand blasting, with a diameter slightly larger than the column precision plug the hole once the plug, etc., are beneficial to improve the fitting accuracy.

high speed bearing Improve Accuracy

After the high speed ‍bearings installed in the host, such as measuring spindle radial runout, measured values ​​can be found in each of its revolutions have some change; continuous measurements, can be found after a certain number of revolutions, the repetition of this change will be approximately appears. precision spindle bearings‍ Indicators to measure the extent of this change is cyclic rotation accuracy, approximately repeated changes in the number of revolutions required precision rotation cycle on behalf of "quasi-periodic" values ​​vary within a large amplitude quasi-periodic, cyclic rotation accuracy is poor .

If properly pre-load on the spindle, the speed gradually increased to nearly the speed of work to implement the "run-in" the role of the bearing can improve the accuracy of the spindle rotation cycle.

6 Install accuracy calibration method

After the angular contact ball bearing into the spindle, install precision calibration sequence is as follows (with shaft diameter of 60 100mm ordinary lathe for example):

(A) measuring the shaft and housing bore size, to determine with precision bearings, with the following requirements:

Take the inner ring and the shaft interference agricultural bearings‍ fit, the amount of interference 0 ~ + 4μm (at light load, when precision is 0); take the outer ring and the bearing bore clearance fit, clearance volume 0 ~ + 6μm (but at the free end of the bearing when using angular contact ball bearings, but also increase the gap); shaft and housing bore surface roundness error in 2μm or less, face parallelism bearing spacer used in the 2μm or less, the end face of the shaft shoulder end foreign beating in 2μm or less; retaining shoulder of the housing bore axis beating 4μm below; cover the front end face of the spindle axis beating 4μm or less.

miniature ball bearings a fixed end bearings mounted on the shaft before

After the bearings were cleaned thoroughly washed with clean kerosene, grease lubrication, the first containing 3% to 5% of the grease into the bearing organic solvents for degreasing and cleaning, and then quantitative grease gun oil filled bearing (accounting bearing space volume of 10% to 15%); Full complement cylindrical roller bearings‍ heating bearings make heating 20 ~ 30 ℃, oil presses the bearing into the shaft; pressure in the tight sets with suitable pressure shaft and bearing against the end face axially the spring balance tape volumes on the bearing outer ring, pre-load starting torque measuring method stipulated check whether a substantial change (even if the bearing is correct, but due to meet or maintain the deformed frame, pre-load there; positioning changes possible).

(3) the bearing shaft assembly into the seat hole

Heated seat hole so that heating 20 ~ 30 ℃, with continuous gentle pressure on the bearing shaft assembly into the housing bore;? Before adjusting cover, tighten the amount of the front cover of 0.02 ~ 0.05μm, to the outer end face of the bearing housing benchmark indicator of the conflict in the journal header surface, the axis of rotation measured beat, require error 10μm or less; will dial gauge positioned on the shaft hole in precision spindle bearings‍ the surface of the back seat of the header conflict, the rotation axis to measure the bearing housing bore concentricity before.

(4) the free end of the bearing may be selectively placed in the position deviation offset mounted to the bearing support position, to offset possible concentricity and roundness deviation of the deviation between each other.‍

LYHY flanged ball bearing precision bearings configuration issues

For some high-precision bearings, its configuration requirements are very high, today we have to introduce a configuration problem on precision bearings.

Traditional applications of precision machine tool spindle  flanged ball ‍bearings are, depending on the machine spindle processes have different requirements. In general, the lathe spindle is used at lower speeds and greater cutting metal cutting load. This type of transmission of the driving torque of the high precision bearings‍ nspindle usually through the pulley or gear. This means that the spindle drive end load is also quite large.

Such applications do not require high speed of the more important parameter is the stiffness and load-carrying capacity. A very common method is to install a working end of the spindle-row cylindrical roller bearings and a double row angular contact thrust ball bearings, while at the end of the spindle drive uses a double row cylindrical roller bearings. This configuration ensures a long working life and excellent rigidity, to produce high quality parts. Moreover, the bearings can operate stably in terms of kinematics is concerned, because the two types of bearings (radial and axial) were carrying the load applied to the spindle (in fact, in order to prevent angular contact thrust ball bearing bearing Full complement cylindrical roller bearings‍ diameter to the load, the outer diameter of a special foreign ensure it never tolerances can contact bearing).

In the design of these types of spindles (which is usually applied when the heavy load), a bearing located about the axis of where a rule of thumb the distance between the centers of the front and rear support bearings for the 3-3.5 times the diameter.

In that require higher speeds (ie, high-speed machining centers or internal grinding), you need to find a different bearing solutions. Obviously, the need to make Other bearing‍ sacrifices in rigidity and load carrying ability in these cases. High-speed applications usually by direct-motor and / or direct drive spindle coupling (the so-called motor spindle).

high speed bearing Ceramic Bearings

Cheng as an important machine parts, because of its incomparable metal bearing excellent performance, high temperature, super-strength materials such as the new world dominate.

Advantages

First, since the ceramic almost afraid of self aligning ball bearing‍ corrosion, so the ceramic rolling bearings suitable for operation under harsh conditions covered with corrosive media.

Second, since the ceramic rolling the ball lower density than steel, but much lighter weight, so when you rotate the outer ring centrifugal effect can be reduced by 40%, thus greatly extended service life.

Third, the expansion and contraction of the ceramic affected smaller than steel, and therefore the gap of the bearing is constant, the bearing allows the temperature changes Taper roller bearings‍ more severe environment.

Fourth, as the ceramic high modulus of elasticity than steel, when the force is not easy deformation, and therefore help to improve the operating speed and achieve high accuracy.‍

miniature ball bearings Applications

Medical equipment, cryogenic engineering, optics, high-speed machine tools, high-speed motor, printing machinery, food processing machinery.

In the field of aerospace, marine, nuclear industry, taper roller bearing‍ petroleum, chemical industry, textile industry, machinery, metallurgy, electric power, food, locomotives, subway, high-speed machine tools and research needs of national defense and military technology in high-temperature, high-speed, cryogenic, flammable, explosive, strong corrosion, vacuum, electrical insulation, non-magnetic, dry friction and other special conditions of work, replace the indispensable role of ceramic bearings are being increasingly recognized people.

With the continuous advancement of processing technology, increasing the level of technology, the cost of ceramic bearings declining, has been in some high precision applications in Angular contact ball bearings‍ the field of small-scale tip, gradually extended from the past only to the national economy in various industrial fields, the market price gradually approaching practical, to achieve an acceptable level users, the wave of large-scale applications of ceramic bearings have been coming!

LYHY flanged ball bearing Uses classification

(1), high-speed bearings: a cold, mechanical elasticity is small, anti-stress, poor thermal performance, light weight, low friction coefficient, etc., can be applied at 12,000 rev / min -75 000 rev / min high speed spindle and the other precision equipment;

(2), the bearing temperature: temperature slewing ring bearing‍ of the material itself has 1200 ℃, and good self-lubricating, temperature is not generated due to the expansion caused by temperature differences between the 100 ℃ -800 ℃. Can be used in furnaces, made ​​of plastic, steel and other high-temperature devices;

(3), corrosion-resistant bearings: the material itself has a corrosion-resistant properties, can be applied in the field of acids, alkalis, inorganic and organic salts, water, etc., such as: plating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment, etc. .

(4), magnetic bearings: do Single row crossed roller slewing bearing‍ not smoke because of non-magnetic dust, can reduce bearing advance peeling, noise and large. Available in demagnetization device. Precision instruments and other fields.

(5), electrical insulation flanged ball ‍bearings: due to the high resistance force, can avoid arcing damage bearings, available in a variety of requirements for insulation of electrical equipment.

(6), vacuum Bearings: Ceramic materials for unique oil-free self-lubricating properties, in ultra-high vacuum environment, can not be achieved to overcome the plain bearing lubrication problems. Note: The above five categories bearings, bearing the same set can be applied to high-temperature, high-speed, pH, Angular contact ball bearings‍ magnetic field, in the non-insulated, but the material properties vary (see performance table of rare earth ceramic material) so please customers choose products, applied according to their own situation, to select the material most suitable ceramic bearings.