About Us

About Us
Linqing Bearing Co., Ltd. is located in the famous historical city of Linqing, Shandong Province, China. The company is a comprehensive enterprise integrating bearing manufacturing and sales, and it is affiliated with Bearing Kingdom Group. We specialize in the production of tapered roller bearings, deep groove ball bearings, cylindrical roller bearings, spherical roller bearings, bearing housing units, thrust ball bearings, and other industrial bearing products. In addition, we provide customized bearing solutions according to customer requirements, including various large-size and non-standard bearings designed for special applications. With advanced production equipment, strict quality control systems, and rich export experience, we are committed to delivering reliable, high-performance bearing products to global customers.

星期五

How do hub bearings do routine maintenance?

Hub bearing is a summary of how to do daily maintenance: CNC machine tool manufacturing application data management system Autodesk launches the most comprehensive solution for manufacturing customers. Economical CNC system hardware design compound cycle cutting instruction outer diameter roughing compound cycle G71 instruction large space 3D laser scanning system CNC lathe machining spherical error analysis and elimination method Precision punching technology in car production Al-Mg and Al-Cu alloy aluminum arc welding electrode selection How to use the machining center tool length compensation function General machinery industry standard English-Chinese Comparison table (2) Processing center processing standard The first automatic wide-band gear splitting machine in China talk about the choice of inverter capacity The effective method to solve the "bottleneck" of auto parts processing Ten suggestions for CNC tool milling technology High-speed cutting Technical development and prospects CNC machine tool failure analysis Case analysis Experience introduces the processing principle of involute tooth profile Gas cutting Introduction Maintenance Daily how to bearing If checking brake lubrication Rotating tire hub bearing Car important walking machine hub axle bears negative reduction chassis running friction resistance Keep the car normal Failure of the heavy-duty wheel bearing bearing may cause noise to the bearing. Especially the front wheel is more likely to cause the direction to run out of control. The wheel bearing must be maintained on schedule. 1. Wheel bearing inspection and inspection of the hub bearing.

Hub bearings are important moving parts for automobiles. The hub axle bears the burden of reducing the frictional resistance during the operation of the chassis and maintaining the normal driving of the car. If the hub bearing is faulty, it may cause noise, bearing heat, etc., especially the front wheel is more obvious, which may lead to dangerous phenomena such as out of control. Therefore, the hub bearings must be maintained on schedule.

1. Inspection of the hub bearing

(1) When inspecting the tightness of the hub bearing, firstly, the axle of the wheel at one end of the wheel of the vehicle is inspected, and the vehicle is safely framed with a vehicle stool, a wooden cover, and the like.

(2) Turn the number of wheels to be inspected by hand to see if the rotation is stable and there is abnormal noise. If the rotation is not smooth and there is friction, the brake part is not normal; if there is no noise, the rotation is not smooth and it is loose when it is tight, indicating that the bearing part is not normal. The hub should be removed when the above abnormality occurs.

For small cars, when inspecting the hub bearings, hold the upper and lower sides of the tires with both hands, and pull the tires back and forth with both hands and repeat them several times. If it is normal, there should be no feeling of looseness and blockage; if the swing has a feeling of looseness, the hub should be removed.

(3) Inspection of the brakes. Usually when inspecting the hub bearing, check the wheel brake device. If there is oil on the inside of the tire, it may be caused by oil leakage from the brake cylinder or brake hose. The cause should be checked and eliminated.

2. Maintenance of wheel bearing

Before disassembling the hub, prepare the wheel hub for maintenance, stop the car and set up the axle to ensure the safety of the maintenance work.

(1) Remove the decorative cover and dust cover of the hub shaft head;

(2) Remove the tire nut and tire, taking care not to hurt the thread of the tire bolt. If it is a disc brake, remove the brake and use it to remove the lock ring or lock pin.

(3) Remove the hub with a special tool;

(4) Scrape the old grease in the bearing, journal and hub cavity, clean the hub bearing and journal with a cleaning agent and wipe dry with a cloth. Finally, wipe the inner cavity of the hub with a cloth.

(5) Check the hub bearing and the bearing race, and find that there are cracks, fatigue peeling and loose bearing rollers. The bearings should be replaced. If there is a pitting on the bearing race, the bearing should also be replaced.

(6) Check the matching between the inner diameter of the bearing and the journal. The matching clearance should be no more than 0.1Omm. When measuring the journal, it should be measured at the upper and lower parts of the vertical ground (the largest wear part at this place). If the fit clearance exceeds the specified service limit, the bearing should be replaced to restore the normal fit clearance. It is not allowed to burr and pock on the journal to narrow the gap.

(7) After all the parts meet the requirements, apply the grease to the inner bearing and put it in the wheel hub.

(8) When applying grease to the bearing inner cavity, be careful to squeeze the grease into the bearing until the grease emerges from the other side of the bearing. Apply a thin layer of grease to the hub cavity and the shaft cap to prevent rust. Be careful not to apply too much grease in the hub cavity, otherwise it will affect heat dissipation and braking.

(9) Put the hub and outer bearing back on the journal, screw the shaft adjusting nut by hand, and then tighten the adjusting nut with the shaft wrench according to the specified torque. After tightening the nut, turn the hub a few turns to see if the bearing is installed. On the other hand, the bearing and the race are properly matched by rotation. At this time, the bearing tightness is appropriate, and the wheel is free to rotate and the axial gap is not felt.

(10) Finally, the components such as the locking piece, the fixing nut, the tire, the dust cover and the decorative cover are sequentially installed.

(11) After the wheel bearing is adjusted, drive a mileage (about 1Okm), stop the inspection, use it to wipe the temperature of the hub. If it is hot, adjust the bearing too tightly, it should be re-adjusted to properly loosen the bearing tightness.

星期三

Maintenance of forklift clutch release bearing

Separating bearings of internal combustion forklift clutches work frequently, and the number of damages accounts for a large proportion of common faults in forklift maintenance. According to the analysis, the high temperature of the engine is transmitted to the separation bearing, and the high-speed rotation of the bearing produces high temperature. Under such conditions, the oil is difficult to remain in the bearing, the bearing works continuously under high temperature conditions, and the lubrication condition is not good, which is frequent The cause of the damage.

The engine does not disintegrate the oil filling method. First open the clutch cover to check the wear of the separated bearing. If it is confirmed that the bearing is not damaged or the wear is not over the limit, remove the clutch pedal, adjust the connecting rod pin, and return the separating bearing and its seat back. In the final position, fill the hole in the bearing housing with a grease gun until the bearing overflows. Then turn the bearing slightly, refill the oil, repeat the above work until there is a little butter around the bearing, and then turn the bearing. Observe the amount of oil. If there is resistance to the rotation of the bearing, it is proved that the bearing is filled with butter. Then remove a small amount of butter from the separation housing and reinstall the removed pin and clutch cover.

The engine oil disintegration method disassembles the engine to expose the assembly of the separation bearing and the bearing housing, and uses a grease gun to fill the small oil hole below the inner ring of the separation bearing housing. When the bearing has a butter overflow, the bearing is rotated until the bearing has a ring. The butter can overflow.

星期一

Influence of machining allowance of cylindrical roller bearing outer diameter on grinding process

In the process of machining the outer diameter of cylindrical roller bearings, it is necessary to pay attention to the problem of retention and to understand the influence of the amount of grinding on the grinding process. From the perspective of impact, the future construction objectives and construction methods can be continuously improved. effect.

1. Process analysis of bearing outer ring

The machining process refers to the operation of the reference process, and the size, geometry, nature and relative position of the production object are changed in a specific way to obtain a semi-finished product or a semi-finished product. The process flow is the process, which is related to factors such as equipment conditions, product quantity, and artificial quality.

The process of machining processes is rich in content, such as raw material storage, blank manufacturing, and heat-treated parts. The process is mainly carried out in a sequence of processes. Single-piece production, mass production, and mass production are the main types of production.

1.1 anti-outer ring channel edge convex method

The outer channel of the self-aligning ball bearing is spherical, but the raceway is raised at point A. This kind of protrusion will affect the self-aligning performance of the self-aligning ball bearing, and even cannot be self-aligning, and there is a convex side on the bearing. When rotating, it will generate frictional resistance to the steel ball, which will accelerate the wear of the steel ball and reduce the service life.

The reason for this phenomenon is that the thickness of the grinding wheel is small and the grinding wheel consumes quickly at the edge of the groove. The outer ring of the self-aligning bearing of the branch is a grooved machining groove, such as 3MZ1410SA. If the thickness of the grinding wheel is smaller than the width of the outer ring, the edge of the groove will not be ground and the protrusion will be formed. In order to eliminate this defect, a grinding wheel having a thickness greater than the outer ring width of 1 to 1.5 mm may be selected.

Because the edge of the outer ring of the bearing is very sharp, and the grinding wheel consumes very fast in the process, if the processing personnel do not adjust it properly in time, it is difficult to ensure that the entire outer ring can be evenly ground. The plane is prone to high and low unevenness, which seriously affects the quality of the product. Therefore, in order to solve this problem better, the processing personnel can adjust the number of dressings appropriately, and increase the compensation amount of the dresser, so as to ensure that the blunt grinding wheel can also get a lot of corrections. In addition, due to the different processing requirements of rough grinding and fine grinding, there are also large differences in the choice of grinding wheel size. Therefore, the processing personnel must select the grinding wheel with the appropriate particle size after the final confirmation of the grinding method, so as to avoid the uneven quality of the outer ring edge of the self-aligning ball bearing.

1.2 Method for reducing the position error of the outer groove spherical surface

The position of the center of the spherical surface may not completely coincide with the position of the theoretical center, and there may be some errors. This is completely controlled by the detection method of the difference in the width of the outer ring to control the outer ring on the M7675B double end grinding machine. The mutual difference can be controlled to be small. Within the range (within 0.015mm). The center position of the outer ring sphere has been measured by the position template. The sample is divided into the maximum limit size and the minimum limit size. When the outer channel is measured on the side of the maximum limit position of the spherical position template, there is a "light gap" near the inner side of the template. There is a "light gap" on the outside. This measurement is completely dependent on visual inspection and the error is large. In order to reduce the error, the instrument is measured by D923 inner diameter measuring instrument. The height of the measuring point is generally h=3mm (the smaller the chamfering size h is, the better). When measuring, the two sides are measured. By adjusting the feeding position of the grinding wheel, both sides The closer the measurement results are, the more symmetrical the two sides of the spherical surface are, that is, the center position of the spherical surface is close to the theoretical center position. If the difference between the outer ring widths is considered, the error can be basically controlled to about 0.015 mm. By changing to the instrument measurement, the error of the center position of the spherical surface can be controlled within a relatively ideal range.

1.3 Method for guaranteeing the radius of curvature of the spherical surface

It is well known that the outer ring channel of the self-aligning ball is a circular arc-shaped spherical surface. The most fundamental purpose of this design is to ensure that the inner ring of the bearing can produce better alignment on the outer ring, although this is a basic The concept of design theory, but in the actual processing and production, there is still a certain error. Among them, poor pairing is one of the most common problems. Most of the processing personnel use the measurement method of the pistol watch when measuring the diagonal difference. The main working principle is to keep the pistol table in motion, the outer ring swing measurement, and the diagonal difference is strict. Control is within reasonable limits. At the same time, in order to control the error within the minimum technical requirements, it is necessary to ensure the consistency of the spherical curvature. Every time before the product is processed, the grinding wheel can be fully repaired, and the grinding wheel dresser is not guaranteed as much as possible during the processing. Make adjustments to improve the processing efficiency and quality of the product.

星期三

NSK NTN SKF TIMKEN KOYO Deep groove ball bearing 6204 690 2rs

SPECIFICATIONS OF BEARING
Product Name
bearing for sliding door wardrobe
Model NO.
6204 RS
Size
20*47*14 mm
Material
chrome steel/stainless steel
Color
metallic
Brand
Clunt
Grade
P0/P6/P5/P4/P2
Weight
0.502kg

星期四

NSKAuto Wheel Hub Bearing, KOYO DAC20420030/29 DAC255000206

Quick Details

Model:
DAC20420030/29 DAC255000206Structure:Whelel HUb BearingType:Whelel HUb Bearing
Brand Name:NSK SKF NTNMaterial:Gcr15 chrome steelSeals Type:open

Packaging & Delivery
Delivery Detail:as cosumers' request
Specifications
 
Auto Wheel Hub Bearing Wheel Bearing NSK KOYO DAC20420030/29 DAC255000206
 
Wheel hub bearings (hub bearing) is mainly used for the rotation of the wheel hub bearing and provide precise guidance, it is under axial load and bear radial load, is a very important parts. Traditional car wheel with bearing is by two sets of tapered roller bearing or ball bearing combination and become, bearing installation, oil, seal and clearance adjustment are in the car on the production line. This structure makes it in the car factory assembly difficulty, the high cost and poor reliability, and the car maintenance station maintenance, also need to bearing for cleaning, oil and adjustment. Wheel hub bearing unit is in the standard angular contact ball bearings and tapered roller bearing developed on the basis of, it will be two sets of bearing assembly as an organic whole, have good performance, can be omitted the clearance adjustment, light weight, compact structure, load capacity, for sealed bearing can advance in grease, ellipsis external hub seal and from maintenance etc, and has been widely used in cars, in truck also.



LGZC No.
Basic Dimensions (mm)TypeMass(kg)Ref. No.Applicable models
dDBCApprox.KOYOFAGSKFSNRNSK
DAC255200206255220.620.6A0.19  617546A  Fiat ,Seat
DAC25520037523737C0.33 576467445539AAFC12025S01 Renault, Peugeot, Citroen
DAC25520042524242C0.36    25BWD01 
 
DAC25560032563232D0.35  BAH5000   
 
DAC2760005027605050C0.42    27BWD01J 
 
DAC2858004228584242B0.41DAC28582RK   28BWD03A 
 
DAC28610042614242-0.51DAC286142AW   28BWD01AToyota
DAC3055002630552626A0.32    30BWD08 
 
DAC30600037603737A0.46DAC3060372RS    Fiat, LadaLancia, Seat,Volvo
DAC3060033760.033737A0.41DAC3060W529891ABBA2B633313CGB10790S05 Fiat, LadaLancia, Seat,Volvo
DAC3060034263.034242-0.56DAC3063W-1     
 
DAC30630042634242A0.57    30BWD01A

Japan NSK Auto Wheel Hub Bearing Fw128/Vkba1191 38bwd12

Quick Details
Model:FW128/VKBA1191 38BWD12Structure:Whelel HUb BearingType:Whelel HUb Bearing
Brand Name:NSK SKF NTNMaterial:Gcr15 chrome steelSeals Type:open

Packaging & Delivery
Delivery Detail:as cosumers' request
Specifications
 
Auto Wheel Hub Bearing Wheel Bearing    FW128/VKBA1191 38BWD12
 
Wheel hub bearings (hub bearing) is mainly used for the rotation of the wheel hub bearing and provide precise guidance, it is under axial load and bear radial load, is a very important parts. Traditional car wheel with bearing is by two sets of tapered roller bearing or ball bearing combination and become, bearing installation, oil, seal and clearance adjustment are in the car on the production line. This structure makes it in the car factory assembly difficulty, the high cost and poor reliability, and the car maintenance station maintenance, also need to bearing for cleaning, oil and adjustment. Wheel hub bearing unit is in the standard angular contact ball bearings and tapered roller bearing developed on the basis of, it will be two sets of bearing assembly as an organic whole, have good performance, can be omitted the clearance adjustment, light weight, compact structure, load capacity, for sealed bearing can advance in grease, ellipsis external hub seal and from maintenance etc, and has been widely used in cars, in truck also.
 

LGZC No.
Basic Dimensions (mm)TypeMass(kg)Ref. No.Applicable models
dDBCApprox.KOYOFAGSKFSNRNSK
DAC255200206255220.620.6A0.19  617546A  Fiat ,Seat
DAC25520037523737C0.33 576467445539AAFC12025S01 Renault, Peugeot, Citroen
DAC25520042524242C0.36    25BWD01 
 
DAC25560032563232D0.35  BAH5000   
 
DAC2760005027605050C0.42    27BWD01J 
 
DAC2858004228584242B0.41DAC28582RK   28BWD03A 
 
DAC28610042614242-0.51DAC286142AW   28BWD01AToyota
DAC3055002630552626A0.32    30BWD08 
 
DAC30600037603737A0.46DAC3060372RS    Fiat, LadaLancia, Seat,Volvo
DAC3060033760.033737A0.41DAC3060W529891ABBA2B633313CGB10790S05 Fiat, LadaLancia, Seat,Volvo
DAC3060034263.034242-0.56DAC3063W-1     
 
DAC30630042634242A0.57    30BWD01A 
 
DAC30640042644242B0.58DAC3064W2RKB     
 
DAC30650021652121A0.27 522372BB1B630374  Fiat,Seat, Polski
DAC30680045684545C0.72    30BWD04 
 
DAC3272004532724545B0.81    32BWB05 
 
DAC32730054735454B0.98DAC3273W     
 
DAC3462003734623737C0.42DAC34620037561447BAHB311316B  Audi, Volkswagen, Chrysrle
DAC34640034643434D0.43DAC3464D     
 
DAC34640037643737C0.5DAC3464G12RS532066DE309726DAGB1088434BWD11Lada,Ople, Vlkswagen, Bedford
DAC34640037A643737C0.5DAC3464W-22RS     
 
DAC34660037663737C0.52 580400CA636114A 34BWD10BOple, Vauxhall, Accord
DAC34680037683737B0.55DAC3468DW   34BWD08A 
 
DAC34680037A683737A0.55DAC34682RS     
 
DAC34680042684242C0.64DAC34682RS   34BWD09A 
 
DAC3564003735643737D0.41DAC3564A-1 BAH0042  Daihastu
DAC35640037A643737D0.46DAC3564A     
 
DAC35650035653535C0.43DAC3565WCS30546238ABT2B445620BGB12004 Renault
DAC35650037653737B0.48    35BWD19E 
 
DAC35660032663232C0.4DAC3566 445980A  Citroen
DAC35660033663333C0.42  BAHB633676GB12306S01 Fiat
DAC35660037663737C0.49DAC35660037544307DBAHB311309GB12136 Volkswagen
DAC35680037683737A0.53DAC3568A2RS541153ABAHB633295BGB10840S02 Fiat, LanciaSeat, Volvo, Zastava
DAC35680033/30683330C0.48    35BWD07A 
 
DAC35680233/3034.9968.023330-0.49DAC3568W-6    Nissan
DAC35680038/3635683836-0.5    35BWD16 
 
DAC35720028722828-0.46     Citroen, Peugeot, Renault, Simca, Talbot
DAC3572022872.022828-0.48 544033BA2B441832ABGB10679 Citroen, Peugeot, Renault, Simca, Talbot
DAC35720033723333C0.58DAC357233B-1W548083BA2B445535AEGB12094S04 Citroen, Peugeot
DAC35720033/31723331B0.55    35BWD06A 
 
DAC35720233/3172.023331-0.54DAC357233B1562686FWB14   
 
DAC35720034723434-0.58DAC357234A540763 DE0763CS46PX1 Lzw7100, Honda
DAC3572043372.043333C0.57  BAHB633669GB12862 Fiat, Lancia
DAC35720045724545A0.63DAC357245CW2RS     
 
DAC3577044234.9977.044242-0.86DAC3577W-3     
 
DAC3580004535804545B1.1DAC3580W-3HR4     
 
DAC35800047804747A0.96DAC358047BW2RS     
 
DAC35800047A804747A1.03DAC3580WHR4     
 
DAC3665003736653737-0.45DAC3665W     
 
DAC36680033683333-0.48DAC3668AW   36BWD04Suzuki
DAC36680033A683333-0.47DAC3668W     
 
DAC36720042724242A0.68    36BWD03 
 
DAC3672053472.043434-0.57DAC367234A   36BWD01BChrysrle, Honda
DAC367600292/277629.227D-  440 190   
 
DAC3772023337723333--   GB40547  
 
DAC37720037723737C0.6   GB12807S03 Fiat, Ford, Lancia, Renault, Chrysrle
DAC3772023772.023737C0.6 527 631BA2B633028CBGB12258  
 
DAC3772043772.043737C0.6 5623 98A633531BGB12131S03 Alfa Romeo, Fiat, Lancia Chrysrle, Renault
DAC37740045744545C0.81 541521C309946AC 37BWD01 
 
DAC3870003738703737A0.48    38BWD19 
 
DAC38700038703838B0.55DAC3870DW 686908A  7100Charde
DAC38700038B703838D0.57    38BWD21 
 
DAC38710233/3037.9971.023330-0.5DAC3871W-2 FW135 38BWD09A 
 
DAC3871003938713939B0.62    38BWD22 
 
DAC38720034723434-0.59DAC3872A   38BWD04 
 
DAC38720040724040D0.63DAC3872W-10575069BFW102   
 
DAC38720236/3337.9972.023633-0.56DAC3872W-8 VKBA 1191 38BWD12Honda,Rover
DAC3873004038734040D0.67DAC3873-1     
 
DAC38740236/3337.98874.023633-0.62DAC3874W-6   38BWD24Toyota
DAC38740236/33B37.9974.023633-0.61    38BWD15 
 
DAC3874004038744040A0.69    38BWD10B 
 
DAC38740050745050D0.78 559 192FWB 116 38BWD06D 
 
DAC3874045074.045050D0.79     Nissan
DAC38760043764343B0.82    38BWD23A 
 
DAC38800036/33803633-0.79    38BWD18 
 
DAC38800236/3337.96780.023633-0.79DAC3880W-1     
 
DAC3968003739683737B0.49DAC39680037540733BABAHB311315 BD 39BWD03Volkswagen, Ford,Audi, Santana
DAC39720037723737C0.58DAC3972D2RSF542186ABAHB311396BGB1277639BWD01LBMW,Opel, Ford, Bedford, Vauxhall
DAC39720037A723737C0.5DAC3972AW4     
 
DAC3972063772.063737B0.57 542186CA    
 
DAC39740039743939C0.68    39BWD05 
 
DAC39/4175003739/41753737C0.64DAC39/41750037567447BBAHB633815AGB12399S01 Audi
DAC4070004340704343D0.63DAC407043W     
 
DAC40720037723633-0.53DAC4072     
 
DAC40720037723737C0.56 566 719BAHB 311 443BGB12 320S 02 Volkswagen Seat
DAC40740036/34743634-0.62DAC4074CW   40BWD16Proton
DAC40740036743636D0.64    40BWD15A 
 
DAC40740040744040C0.66DAC407440   40BWD06D 
 
DAC40740042744242B0.71    40BWD12 
 
DAC40750037753737C0.63 559 494BAHB633966E  Ford
DAC4076003340763333D0.61  474743B555 80040BWD08A 
 
DAC40760033/28763328A0.55 539166AB474 743  Chrysrle, Volkswagen, Rover
DAC40760041/38764138C0.7DAC407612RS559226FW124 40BWD05 
 
DAC4080003028030.230.2-0.68 523854440320HY44F B10394S01  
 
DAC40800031803131D0.66  BA2B445469BA   
 
DAC40800036/34803634-0.74DAC4080M1 FWB101 40BWD14GM, Mitsubishi
DAC40820040824040A0.88      
 
DAC4084033884.033838C0.98      
 
DAC401080032/171083217--  BA2B 445 533TGB1 0872 S02  
 
DAC4275003742753737A0.6DAC427 5BW2RS5454 95DBA2B 633 457GB12 010 Alfa Romeo, Audi, Porsche, Saab
DAC42760033763333C0.65   555 80142B WD12 
 
DAC42760038/35763835A0.56    42BWD06Nissan
DAC42760040/37764037A0.66DAC427602RSF547059A909 042   
 
DAC42780038783838C0.7DAC4278A2RS   42BWD09 
 
DAC42780041/38784138C0.75DAC4278C2RS     
 
DAC42800036/34803634-0.76    42BWD13 
 
DAC42800037803737D0.7  BAHB 633 770   
 
DAC42800045804545B0.86DAC4280W-2   42BWD11 
 
DAC42800045A804545-0.85DAC4280WHR4     
 
DAC4280034280.034242A0.82DAC4280B2RS527243CBA2B309609AD   
 
DAC42820036823636C0.76DAC4282561481BA2B446047GB12163S04 Citroen, Peugeot, GM
DAC42820037823737C0.8 565636BAHB311413AGB12269 Audi
DAC42840036843636A0.84 564727BA2B444090ABGB10857S02 Peugeot, Simca, Talbot
DAC42840039843939A0.95 543359B440090GB10702S02