6204 20×47×14 0.11

The above parameter is for reference only; Please visit our website: https://www.supplyforever.com/We will provide you with the best offer according to your needs.

6204	20×47×14	0.11
6205	25×52×15	0.13
6206	30×62×16	0.20
n322c3	110×240×50	10.30
16010	50×80×10	0.18
6013	65×100×18	0.41
7202	15×35×11	0.04
71922	110×150×20	0.85
nu1020  k-m-p51	100*150*24	1.53
6010	50×80×16	0.26
6308 nr	40×90×23	0.61
2210	50×90×23	0.62
49/32	40X52X22 MM	0.07
7209 k	45×85×19	0.50
7005c	25×47×12	0.08
1308 k	40×90×23	0.71
61934	170×230×28	5.19
510749/10710	63.5*92.075*13.495	0.26
6332, C3 Type.	160×340×68	32.00
6328, C3 Type	140×300×62	22.76
6201 2RS	12×32×10	0.04
6202 2RS	15×35×11	0.05
6203 2RS	17×40×12	0.07
6302 2RS	15×42×13	0.09
6303-2RS	17×47×14	0.12
6201 2RS	12×32×10	0.04
6202 2RS	15×35×11	0.05
6203 2RS	17×40×12	0.07
6302 2RS	15×42×13	0.09
6303-2RS	17×47×14	0.12
GE30	30×47×22×18	0.15
62309	45×100×35	1.14
GE45	45×68×32×25	0.43
208	40*80*27	0.44
209	45*85*19	0.41
205	25*52*21	0.16
NJ309	45×100×25	1.03
GE 50	50×75×35×28	0.55
62309	45×100×35	1.14
1621RS NR	12.7*34.93*11.11	0.05
600 2Z	15×32×9	0.03
6002-2Z	15×32×9	0.03
6002-2RS	15×32×9	0.03
6003-2RS	17×35×10	0.04
6004-2ZC3	20×42×12	0.07
6004-2RS	20×42×12	0.07
6005-2Z	25×47×12	0.07
605 2Z	5×14×5	0.00
6005 2RS	25×47×12	0.07
607 Z	7×19×6	0.01
608 2Z	8×22×7	0.01

20pcs H414249/H414210 Timken 71.438*136.525*41.275

20pcs H414249/H414210 Timken	71.438*136.525*41.275	2.640
2pcs 24168BK30C3 FAG	340×580×243	266.000
H24168-HG	320*440*317*55	53.000
32210J	50×90×24.75	0.650
1) FAG 760 2012 TVP	12*32*10	0.042
2) FAG B7008 ETP4 SUL	40*68*15	0.188
EE234160 / 234213CD	406.4*546.1*76.2*61.12	74.600
300 PCS 7003 AW NSK	17×35×10	0.030
300 PCS 7006 AW NSK	30×55×13	0.120
020 PAIRS 7006 CTYNDULP4 NSK	30×55×26	0.240
020 PAIRS 7007 CTYNDULP4 NSK	35×62×28	0.280
020 PAIRS 7008 CTYNDULP4 NSK	40×68×30	0.420
010 PAIRS 7202 CTYNDULP4 NSK	15×35×22	0.090
025 PAIRS 7205 CTYNDULP4 NSK	25×52×30	0.260
025 PAIRS 7206 CTYNDULP4 NSK	30×62×32	0.460
NU202 SKF	15×35×11	0.047
NU202E.TVP2	15×35×11	0.048
32044	220*340*76	23.300
30236	180×320×57	20.500
29334	170×280×67	16.300
29440	200×400×122	85.200
RNA 4909	45×68×22	0.073
MF74的
CF8	8*19*32	0.027
LM12	12*21*30	0.060
LM12UU	12*21*30	0.060
LBD12	12*21*30	0.060
KN405-PP	OR INA KN40-B-PP(40*62*80mm)
00152 (taper roller bearing)	12.7*38.1*13.736	0.080
00050 (taper roller bearing)
P309	45×245×129×57	4.1KG
( TIMKEN ) 7905 W1CRSULP4	25×42×9	0.050
NTN NK 12/16	12×19×16	0.030
NU 4036X2	80*180*82.6	20KG
17TAC 47BSUC10PN7B	17*47*15	0.110
25TAC 62BSUC10PN7B	25*62*15	0.130
30TAC 62BSUC10PN7B	30*62*15	0.200
35TAC72BSUC10PN7B	35*72*15	0.320
40TAC90BSUC10PN7B	40*90*20	0.350
50TAC100BSUC10PN7B	50*100*20	0.450
7001CTYNDULP4	12×28×16	0.040
7008	40×68×15	0.210
7012	60×95×18	0.120
7013	65×100×18	0.500
7014	70×110×20	0.620
7016	80×125×22	0.970
7020	100×150×24	1.250
7024	120×180×28	2.620
7026	130×200×33	3.910
7206CTYNDULP4	30×62×32	0.400

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Causes of failure of operation caused by automobile wheel bearing failure

After a period of exercise, the vibration and noise are maintained at a certain level, and the spectrum is very single, only one or two times the frequency appears. There are very few spectrums above the power frequency, and the bearing status is very stable and enters a stable working period.

After continuing to run, the vibration and noise of the automobile hub bearing began to increase, and sometimes abnormal sound appeared, but the change of vibration increased slowly. At this time, the bearing kurtness value suddenly reached a certain value. We believe that the bearing is an initial failure at this time.
At this time, it is required to closely monitor the bearing and pay close attention to its changes. After that, the bearing kurtness value begins to drop rapidly and approaches the normal value, while the vibration and noise begin to increase significantly, and the increase rate begins to accelerate. When the vibration exceeds the vibration standard (such as ISO2372 standard), the bearing kurtness value also begins. Rapid increase, when both exceed the vibration standard, and the kurtosis value also exceeds the normal value (the available kurtosis relative standard), we believe that the bearing has entered the late fault production, it is necessary to repair the equipment in time and replace the bearing.

Automobile wheel bearings exhibit late failure characteristics to serious failures (generally bearing damage such as axles, burns, sand cracks, raceways, bead wear, etc.) are not more than one week, the larger the equipment capacity, the faster the speed The shorter the interval. Therefore, in the actual bearing fault diagnosis, once the late fault characteristics are found, the bearing should be judged decisively and the repair should be arranged as soon as possible.

1. Do not drill, groove, chamfer or end face on the bearing during installation. Otherwise, it is easy to cause deformation of the bearing ring, affecting the bearing accuracy and life, while the cut metal easily enters the working surface of the bearing, accelerating the wear of the raceway and the rolling element, causing premature failure of the bearing.

2. Do not directly hit the bearing ring with a hand hammer during installation. The reference end face of the bearing is mounted in close proximity to the shoulder. The reference end face of the bearing is distinguished according to whether the end face of the automobile wheel bearing is typed or not. The deep groove ball bearing, the self-aligning ball bearing, the cylindrical roller bearing, the spherical roller bearing and the needle bearing are based on the non-word end face; Angular contact ball bearings and tapered roller bearings have a word end surface as a reference surface.
3. The pressure during installation should be added to the end face of the ferrule with the interference fit. When installed on the shaft, the pressure should be added to the end face of the inner ring of the bearing; when it is installed in the hole of the bearing housing, the pressure should be added outside the bearing. On the end of the ring. It is not allowed to pass the rolling elements and keep the pressure transmitted.

4. For the inner ring is the tight fit and the outer ring is the sliding fit. When installing, if it is inseparable, the bearing should be installed on the shaft first, then the shaft and the bearing are installed together in the bearing housing hole; For detachable models, the inner and outer rings can be installed separately.
5. To prevent the bearing from being tilted, the center line of the shaft and bearing hole must be coincident during installation. If the installation is not correct, when reinstalling, the bearing must be pulled out through the inner ring end face.
The main task of automobile wheel bearing failure analysis is to find out the main factors causing bearing failure based on a large amount of background materials, analysis data and failure modes, so as to propose improvement measures in a targeted manner and extend the service life of spherical roller bearings. Avoid sudden early failure of the bearing.

Analysis of several characteristics and characteristics of TIMKEN bearings

a) Type and characteristics of sliding TIMKEN bearings
I type of sliding TIMKEN bearing
Or called radial sliding TIMKEN bearing, 1. The sliding TIMKEN bearing is divided according to the accepted load: the radial sliding TIMKEN bearing. Mainly accepting radial loads; thrust sliding TIMKEN bearings, mainly accepting axial loads.
2. Sliding TIMKEN bearings are suitable for low speed, high precision, heavy duty and structurally required locations.
Rolling TIMKEN bearings are rolling friction compared to sliding TIMKEN bearings. The contact surface is small (the ball TIMKEN bearing is point contact, the roller TIMKEN bearing is line contact), the friction coefficient is small, the heat is less; the wear is small, the precision is good, and the operation is suitable for a higher speed. However, the carrying capacity is slightly poor and the vibration resistance is poor.
3. Radial sliding TIMKEN imported bearings Centripetal sliding TIMKEN bearings are available in both integral and split versions.
II sliding TIMKEN bearing characteristics
The contact surface is large, the structure is simple, the volume is small, the bearing capacity is strong, the vibration resistance is good, but the friction coefficient is large, the heat is easy to generate, and the lubrication is required, and the sliding TIMKEN bearing is sliding friction. Suitable for low speed and heavy load.
b) Type and characteristics of rolling TIMKEN bearings
I scroll type of TIMKEN bearing
Rolling TIMKEN bearings are usually classified according to their load bearing direction and rolling body shape.
1 According to the direction of the accepted load, it is divided into centripetal TIMKEN bearing and thrust TIMKEN bearing.
2 According to the shape of the rolling element, the ball is divided into a ball TIMKEN bearing and a roller TIMKEN bearing. The roller is further divided into a cylindrical roller, a tapered roller, a spherical roller and a needle roller.
II rolling TIMKEN bearing characteristics

Technical Introduction of Damage Maintenance of TIMKEN Flange Bearing

I. Vibration of Bearings

Vibration damage of TIMKEN bearings is very sensitive, such as spalling, indentation, rust, crack, wear and tear, etc. can be reflected in vibration measurement. Therefore, the vibration can be measured by using special flange bearing vibration measuring device (frequency analyzer, etc.). The abnormal situation can not be deduced by frequency. The measured values vary with the use conditions of bearings or the installation position of sensors, so it is necessary to analyze and compare the measured values of each machine before determining the judgment criteria.

Two, temperature

Bearing temperature, generally outside the room temperature can be inferred, if the use of oil holes can directly measure the temperature of the outer ring, it is more appropriate.

Usually, the temperature rises slowly with the start of operation and reaches a stable state after 1-2 hours. Normal temperature varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are suitable, the temperature will rise sharply and abnormal high temperature will occur. At this time, the operation must be stopped and necessary preventive measures should be taken.

The use of heat sensors can monitor the working temperature at any time, and realize automatic alarm or stop to prevent the occurrence of burning shaft accidents when the temperature exceeds the specified value.

High temperature is often used to indicate abnormal conditions. High temperatures are also harmful lubricants. Sometimes the overheating of flange bearings can be attributed to lubricants. Long-term continuous transfer at temperatures above 125 C will reduce life. Causes of high temperature include: insufficient or excessive lubrication, lubricants. It contains impurities, excessive load loss ring, insufficient clearance, and high friction caused by oil seal, etc.

Secondly, check the condition of raceway surface, rolling surface and mating surface of bearings, as well as the wear condition of cage, etc. without damage and abnormality, especially to observe the track of raceway surface. To judge whether Wuxi bearings can be used again, it is necessary to consider the degree of flange bearing damage, machine performance, importance, operating conditions, inspection cycle and so on.

Inspection results, if found TIMKEN bearing damage and abnormal situation, please according to the phenomenon of bearing damage to identify the causes, formulate countermeasures. In addition, the inspection results show that if there are several defects below, the flange bearings can no longer be used, and new bearings need to be replaced.

A. Any of the inner and outer rings, rolling bodies and cages with cracks and debris.

B. Any one of the inner and outer rings or rolling bodies is peeled off.

C. The surface of raceway, baffle and rolling element have obvious sticking injury.

D. The cage is badly worn or rivets are loosened.

E. Rust and scar on raceway surface and rolling element.

F. There are notable indentations and scratches on the rolling surface and the rolling body.

G. There is creep on the inner diameter or outer diameter of the inner ring.

H. Excessive heat and discoloration.

I. Grease seal TIMKEN bearing seal ring and dust cover damage to serious.

INA rolling bearing installation basic conditions and daily maintenance points

If there are foreign objects such as iron filings, burrs, dust, etc. in the INA bearing, the rolling bearing will generate noise and vibration during operation, and even damage the raceway and rolling elements. Therefore, before installing the bearings, you must ensure that the mounting surface and the installation environment are clean.
Lubrication has a very important influence on the operation and life of INA bearings. Here is a brief overview of the general principles for selecting greases. Grease is made of base oil, thickener and additives. The grease performance of different types and different grades varies greatly. The allowable rotation limit is different. Be careful when selecting. The performance of grease is mainly determined by the base oil. Generally, the low viscosity base oil is suitable for low temperature, high speed and high viscosity for high temperature and high load. The thickener is also related to the lubricating properties, and the water resistance of the thickener determines the water resistance of the grease. In principle, the different greases of the brand cannot be mixed, and even the grease of the same thickener may have a bad influence on each other due to the different additives.
1) Installation space of rolling bearing Bearing type that can be accommodated in the bearing installation space Since the rigidity and strength of the shaft are important when designing the shafting, the shaft diameter is generally determined first, that is, the inner diameter of the INA bearing. However, rolling bearings are available in a variety of sizes and types, and the most suitable bearing type should be selected.
2) The size, direction and nature of the load bearing load [The bearing capacity of the bearing is expressed by the basic rated load, and its value is shown in the bearing size table] The rolling bearing load is subject to change, such as the magnitude of the load, whether there is only radial load, axial load Whether it is one-way or two-way, the degree of vibration or shock, and so on. After considering these factors, choose the most suitable bearing type.
3) The bearing type whose speed can adapt to the mechanical speed [the limit value of the bearing speed is expressed by the limit speed, and its value is shown in the bearing size table] The limit speed of the INA bearing is not only determined by the bearing type but also the bearing size, cage type, precision. Grades, load conditions, lubrication methods, etc. Therefore, these factors must be considered when selecting.
4) Rotational accuracy Bearing type with required rotation accuracy [The dimensional accuracy and rotation accuracy of bearings have been standardized by GB according to bearing type] Machine spindles, gas turbines and control machines require high rotational accuracy, high speed and low friction, respectively. Rolling bearings with a precision of 5 or more should be used.
5) Rigidity The bearing type that satisfies the rigidity required for the mechanical shafting [When the bearing is subjected to load, the contact portion between the rolling element and the raceway is elastically deformed. "High rigidity" means that the amount of deformation of the elastic deformation is small.] In the machine tool spindle and the final stage of the vehicle, the rigidity of the shaft must be increased, and the rigidity of the bearing must be increased. The rolling bearing is subjected to load deformation smaller than the ball bearing. Applying a pre-tightening (negative clearance) to the INA bearing increases the rigidity. This method is suitable for angular contact ball bearings and tapered roller bearings.
6) The relative inclination analysis of the inner ring and the outer ring makes the inner ring and the outer ring of the bearing relatively inclined (such as the deflection of the shaft caused by the load, the accuracy of the shaft and the outer casing or the installation error), and is selected to adapt to this The type of INA bearing used. If the relative inclination of the inner ring and the outer ring is too large, the bearing may be damaged by internal load. Therefore, you should choose the type of bearing that can withstand this tilt.
7) Installation and disassembly Regular installation and disassembly frequency and assembly and disassembly method When assembling and disassembling frequently, it is convenient to use cylindrical roller bearings with separate inner and outer rings, needle roller bearings and tapered roller bearings. Tapered bore self-aligning ball bearings and tapered bore spherical roller bearings are easy to assemble and disassemble by using fasteners or withdrawal sleeves.
The surface of the rolling bearing is coated with anti-rust oil. You must carefully clean it with clean gasoline or kerosene, and then apply it with clean high-quality or high-speed high-temperature grease. The effect of cleanliness on INA bearing life and vibration noise is very large. But we must remind you that the fully enclosed bearings do not need to be cleaned and refueled.