China wholesaler Dac397237 ABS Automotive Wheel Hub Bearing Dac39720037ABS/Bah0106/Dac39720037m Double Radial Ball Bearing drive shaft bearing

Product Description

Detailed Photos

Product Description

The traditional automobile wheel bearings are composed of 2 sets of tapered roller bearings or ball bearings. The mounting, oiling, sealing and clearance adjustment of the bearings are all carried out on the automobile production line.This kind of structure makes it difficult to assemble in the automobile production plant, high cost, poor reliability, and when the automobile is maintained in the maintenance point, it also needs to clean, grease and adjust the bearing.Wheel hub bearing unit is in the standard angular contact ball bearings and tapered roller bearings, on the basis of it will be 2 sets of bearing as a whole, has the assembly clearance adjustment performance is good, can be omitted, light weight, compact structure, large load capacity, for the sealed bearing prior to loading, ellipsis external wheel grease seal and from maintenance etc, and has been widely used in cars, in a truck also has a tendency to gradually expand the application.

Bearing Detail
Item No. DAC397237 ABS
High Precision Wheel Hub Bearing Automotive Front Bearing DAC397237 ABS
Wheel hub bearing Wheel hub bearing
Seals Type: DU ZZ 2RS
Material Chrome steel GCr15
Precision P0,P2,P5,P6,P4
Clearance C0,C2,C3,C4,C5
Cage type Steel cage
Ball Bearings Feature Long-life with high quality
Low-noise with strict controlling the quality of HJR bearing
High-load by the advanced high-technical design
Competitive price, which has the most valuable
OEM service offered, to meet the customers requirements
Application mill rolling mill rolls, crusher, vibrating screen, printing machinery, woodworking machinery, all kinds of industry
Bearing Package  ABSPallet,wooden case,commercial packaging or as customers’ requirement

Packaging & Shipping

Packaging & Delivery:
Packaging Details Standard exporting packing or according to the customer’s requirements
Package Type: A. Plastic tubes Pack + Carton + Wooden Pallet
  B. Roll Pack + Carton + Wooden Pallet
  C. Individual Box +Plastic bag+ Carton + Wooden Palle

Lead Time :
Quantity(Pieces) 1 – 300 >300
Est. Time(days) 2 To be negotiated

Product Parameters

1.Automobile wheel bearing structure:
The largest number of wheel bearings for cars used in the past was the use of single row tapered roller or ball bearings in pairs. With the development of technology, car hub units have been widely used in cars. The range and use of hub bearing units is growing, and today it has reached the third generation: the first generation consists of double row angular contact bearings. The second generation has a flange for fixing the bearing on the outer raceway, which can be simply fixed to the axle by a nut. Make the maintenance of the car easier. The third-generation hub bearing unit is equipped with a bearing unit and an anti-lock brake system ABS. The hub unit is designed with an inner flange and an outer flange, the inner flange is bolted to the drive shaft, and the outer flange mounts the entire bearing together.
2.Automotive wheel bearing applications:
The main function of the hub bearing is to load and provide precise guidance for the rotation of the hub. It is both an axial load and a radial load and is a very important component. The traditional automotive wheel bearings are composed of 2 sets of tapered roller bearings or ball bearings. The installation, oiling, sealing and clearance adjustment of the bearings are carried out on the automobile production line. This structure makes it difficult to assemble in a car production plant, high in cost, and poor in reliability, and the car needs to be cleaned, oiled, and adjusted at the time of maintenance at the maintenance point.
3.Automotive wheel bearing features:
The hub bearing unit is developed on the basis of standard angular contact ball bearings and tapered roller bearings. It integrates 2 sets of bearings and has good assembly performance, can eliminate clearance adjustment, light weight, compact structure and load capacity. Large, sealed bearings can be pre-loaded with grease, omitting external hub seals and maintenance-free. They have been widely used in cars, and there is a tendency to gradually expand applications in trucks.

Type No. Size (mm)dxDxB Type No. Size (mm) dxDxB
DAC20420030 20x42x30mm DAC30600037 30x60x37mm
DAC20505716 20x50x20.6mm DAC30600043 30x60x43mm
DAC25525716 25x52x20.6mm DAC30620038 30x62x38mm
DAC25520037 25x52x37mm DAC30630042 30x63x42mm
DAC25520040 25x52x40mm DAC30630342 30X63.03x42mm
DAC25520042 25x52x42mm DAC30640042 30x64x42mm
DAC25520043 25x52x43mm DAC30670571 30x67x24mm
DAC25520045 25x52x45mm DAC30680045 30x68x45mm
DAC25550043 25x55x43mm DAC32700038 32x70x38mm
DAC25550045 25x55x45mm DAC32720034 32x72x34mm
DAC2565716 25x56x20.6mm DAC32720045 32x72x45mm
DAC25600032 25x60x32mm DAC32720345 32X72.03x45mm
DAC2560571 25x60x29mm DAC32730054 32x73x54mm
DAC25600045 25x60x45mm DAC34620037 34x62x37mm
DAC2562571 25x62x28mm DAC34640034 34x64x34mm
DAC25620048 25x62x48mm DAC34640037 34x64x37mm
DAC25720043 25x72x43mm DAC34660037 34x66x37mm
DAC27520045 27x52x45mm DAC34670037 34x67x37mm
DAC27520050 27x52x50mm DAC34680037 34x68x37mm

DAC25525716   565592       25   52   20.6   20.6   0.19 
DAC25520037  156704      25  52  37  37  0.31 
DAC25520042        25  52  42  42  0.36 
DAC25520043  546467/576467      25  52  43  43  0.36 
DAC25550043    617546A  25BWD01  25  55  43  43  0.44 
DAC25560032  445979  BT2B445539AA    25  56  32  32  0.34 
DAC29530037  857123AB      29  53  37  37  0.35 
DAC30600037    BAH5000    30  60  37  37  0.42 
DAC30600337  529891AB      30  60.3  37  37  0.42 
DAC30600337  545312/581736      30  60.3  37  37  0.42 
DAC34620037  531910/561447  BA2B633313CA  30BWD07  34  62  37  37  0.41 
DAC34640034    434201B/VKBA1307  30BWD07  34  64  34  34  0.43 
DAC34640037  532066DE  BAHB311316B/3 0571 4    34  64  37  37  0.47 
DAC34640037  540466B/8571  VKBA1382  34BWD03/ACA78  34  64  37  37  0.47 
DAC34660037  559529/580400CA  605214/VKBA1306  34BWD04/BCA70  34  66  37  37  0.5 
DAC35640037    BA2B3 0571 6  34BWD11  35  64  35  35  0.4 
DAC35650035  546238A  636114A/479399  34BWD10B  35  65  35  35  0.4 
DAC35650037    BAH0042    35  65  37  37  0.51 
DAC35660032    BA2B443952/445620B    35  66  32  32  0.42 
DAC35660033      35BWD19E  35  66  33  33  0.43 
DAC35660037  544307C/581571A  445980A/BAH-5001A    35  66  37  37  0.48 
DAC35680037  430042C  633676/BAH-0015    35  68  37  37  0.52 
DAC35680037  541153A/549676  311309/BAH-571    35  68  37  37  0.52 
DAC35720033  548083  633528F/633295B  35BWD21(4RS)  35  72  33  33  0.58 
DAC35720033  548033  BAH0031    35  72  33  33  0.58 
DAC3572571    BA2B445535AE  XGB 4571  35  72.04  33  33  0.58 
DAC35725713/31  562686  456162/44762B  XGB 4571  35  72.02  33  31  0.54 
DAC35720034  54 0571 /548376A  BAHB633669/BAH0013    35  72  34  34  0.58 
DAC35770042    VKBA1343  35BWD06ACA111  34.99  77.04  42  42  0.86 
DAC37720033    VKBA857  35BWD01C  37  72  33  33  0.51 
DAC37720037    VKBA3763    37  72  37  37  0.59 
DAC37725717  527631  BAH0051B    37  72.02  37  37  0.59 
DAC37740045  541521C  BAH0012AM5S    37  74  45  45  0.79 
DAC38700037  ZFRTBRGHOO37  633571CB    38  70  37  37  0.56 
DAC38700038    35715A  37BWD01B  38  70  38  38  0.57 
DAC38710033/30    BAHB636193C    37.99  71.02  33  30  0.5 
DAC38710039   574795A  686908A  38BWD31CA53  37.99  71  39  39  0.62 
DAC38720036/33     FW135  38BWD09ACA120  38  72  36  33   
DAC38720040  575069B  VKBA3929  30BWD22  38  72  40  40  0.63 
DAC38730040       30BWD12  38  73  40  40  0.67 
DAC38740036/33   574795A  VKBA1377    38  74  36  33  0.61 

Our Advantages

SOLUTION
– At the beginning, we will have a communication with our customers on their demand, then our  engineers will work out an optimum solution based on the customers’ demand and condition.
QUALITY CONTROL (Q/C)
– In accordance with ISO standards, we have professional Q/C staff, precision testing instruments and internal inspection system, the quality control is implemented in every process from material receiving to products packaging to ensure our bearings quality.
PACKAGE
– Standardized export packing and environment-protected packing material are used for our bearings, the custom boxes, labels, barcodes etc. can also be provided according to our customer’s request.
LOGISTIC
– Normally, our bearings will be sent to the customers by CZPT transportation due to its heavy weight, airfreight, express is also available if our customers need.
WARRANTY
– We warrant our bearings to be free from defects in material and workmanship for a 12 months period from the shipping date, this warranty is voided by non-recommended use, improper installation or physical damage.

FAQ

Q: What’s your after-sales service and warranty?
A: We promise to bear the following responsibility when defective product is found:
1.12 months warranty from the first day of receiving goods;
2.Replacements would be sent with goods of your next order;
3.Refund for defective products if customers require.
Q: Do you accept ODM&OEM orders?
A: Yes, we provide ODM&OEM services to worldwide customers, we are CZPT to customize housings in different styles, and sizes in different brands, we also customize circuit board & packaging box as per your requirements.
Q: What’s the MOQ?
A: MOQ is 10pcs for standardized products; for customized products, MOQ should be negotiated in advance. There is no MOQ for sample orders.
Q: How long is the lead time?
A: The lead time for sample orders is 3-5 days, for bulk orders is 5-15 days.
Q: How to place orders?
A: 1. Email us the model, brand and quantity, consignee information, shipping way and payment terms;
2.Proforma Invoice made and sent to you;
3.Complete Payment after confirming the PI;
4.Confirm Payment and arrange production. /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Contact Angle: 45°
Aligning: Aligning Bearing
Separated: Separated
Samples:
US$ 1/Set
1 Set(Min.Order)

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Order Sample

high quality ,low noise
Customization:
Available

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Customized Request

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

ball bearing

How does Preload Affect the Performance and Efficiency of Ball Bearings?

Preload is a crucial factor in ball bearing design that significantly impacts the performance, efficiency, and overall behavior of the bearings in various applications. Preload refers to the intentional axial force applied to the bearing’s rolling elements before it is mounted. This force eliminates internal clearance and creates contact between the rolling elements and the raceways. Here’s how preload affects ball bearing performance:

  • Reduction of Internal Clearance:

Applying preload reduces the internal clearance between the rolling elements and the raceways. This eliminates play within the bearing, ensuring that the rolling elements are in constant contact with the raceways. This reduced internal clearance enhances precision and reduces vibrations during operation.

  • Increased Stiffness:

Preloaded bearings are stiffer due to the elimination of internal clearance. This increased stiffness improves the bearing’s ability to handle axial and radial loads with higher accuracy and minimal deflection.

  • Minimized Axial Play:

Preload minimizes or eliminates axial play within the bearing. This is especially important in applications where axial movement needs to be minimized, such as machine tool spindles and precision instruments.

  • Enhanced Rigidity:

The stiffness resulting from preload enhances the bearing’s rigidity, making it less susceptible to deformation under load. This is critical for maintaining precision and accuracy in applications that require minimal deflection.

  • Reduction in Ball Slippage:

Preload reduces the likelihood of ball slippage within the bearing, ensuring consistent contact between the rolling elements and the raceways. This leads to improved efficiency and better load distribution.

  • Improved Running Accuracy:

Preloading enhances the running accuracy of the bearing, ensuring that it maintains precise rotational characteristics even under varying loads and speeds. This is essential for applications requiring high accuracy and repeatability.

  • Optimized Performance at High Speeds:

Preload helps prevent skidding and slipping of the rolling elements during high-speed operation. This ensures that the bearing remains stable, reducing the risk of noise, vibration, and premature wear.

  • Impact on Friction and Heat Generation:

While preload reduces internal clearance and friction, excessive preload can lead to higher friction and increased heat generation. A balance must be struck between optimal preload and minimizing friction-related issues.

  • Application-Specific Considerations:

The appropriate amount of preload depends on the application’s requirements, such as load, speed, accuracy, and operating conditions. Over-preloading can lead to increased stress and premature bearing failure, while under-preloading may result in inadequate rigidity and reduced performance.

Overall, preload plays a critical role in optimizing the performance, accuracy, and efficiency of ball bearings. Engineers must carefully determine the right preload level for their specific applications to achieve the desired performance characteristics and avoid potential issues related to overloading or inadequate rigidity.

ball bearing

How do Temperature and Environmental Conditions Affect the Performance of Ball Bearings?

Temperature and environmental conditions have a significant impact on the performance and longevity of ball bearings. The operating environment can influence factors such as lubrication effectiveness, material properties, and overall bearing behavior. Here’s how temperature and environmental conditions affect ball bearing performance:

  • Lubrication:

Temperature variations can affect the viscosity and flow characteristics of lubricants. Extreme temperatures can cause lubricants to become too thin or too thick, leading to inadequate lubrication and increased friction. In high-temperature environments, lubricants can degrade, reducing their effectiveness.

  • Material Properties:

Temperature changes can alter the material properties of the bearing components. High temperatures can lead to thermal expansion, affecting bearing clearances and potentially causing interference between components. Extreme cold temperatures can make materials more brittle and prone to fracture.

  • Clearance Changes:

Temperature fluctuations can cause changes in the internal clearance of ball bearings. For instance, at high temperatures, materials expand, leading to increased clearance. This can affect bearing performance, load distribution, and overall stability.

  • Corrosion and Contamination:

Harsh environmental conditions, such as exposure to moisture, chemicals, or abrasive particles, can lead to corrosion and contamination of bearing components. Corrosion weakens the material, while contamination accelerates wear and reduces bearing life.

  • Thermal Stress:

Rapid temperature changes can result in thermal stress within the bearing components. Differential expansion and contraction between the inner and outer rings can lead to stress and distortion, affecting precision and bearing integrity.

  • Noise and Vibration:

Temperature-related changes in material properties and internal clearances can influence noise and vibration levels. Extreme temperatures can lead to increased noise generation and vibration, affecting the overall operation of machinery.

  • Lubricant Degradation:

Environmental factors like humidity, dust, and contaminants can lead to premature lubricant degradation. Oxidation, moisture absorption, and the presence of foreign particles can compromise the lubricant’s performance and contribute to increased friction and wear.

  • Seal Effectiveness:

Seals and shields that protect bearings from contaminants can be affected by temperature fluctuations. Extreme temperatures can lead to seal hardening, cracking, or deformation, compromising their effectiveness in preventing contamination.

  • Choosing Appropriate Bearings:

When selecting ball bearings for specific applications, engineers must consider the expected temperature and environmental conditions. High-temperature bearings, bearings with specialized coatings, and those with enhanced sealing mechanisms may be necessary to ensure reliable performance.

Overall, understanding the impact of temperature and environmental conditions on ball bearing performance is crucial for proper bearing selection, maintenance, and ensuring optimal operation in diverse industries and applications.

ball bearing

How do Ball Bearings Differ from Other Types of Bearings like Roller Bearings?

Ball bearings and roller bearings are two common types of rolling-element bearings, each with distinct designs and characteristics. Here’s a comparison of ball bearings and roller bearings:

  • Design:

Ball Bearings: Ball bearings use spherical balls to separate and reduce friction between the bearing’s inner and outer rings. The balls enable rolling motion and smooth contact, minimizing friction.

Roller Bearings: Roller bearings, as the name suggests, use cylindrical or tapered rollers instead of balls. These rollers have larger contact areas, distributing loads over a broader surface.

  • Friction and Efficiency:

Ball Bearings: Due to the point contact between the balls and the rings, ball bearings have lower friction and are more efficient at high speeds.

Roller Bearings: Roller bearings have a larger contact area, resulting in slightly higher friction compared to ball bearings. They are more suitable for heavy-load applications where efficiency is prioritized over high speeds.

  • Load Capacity:

Ball Bearings: Ball bearings excel at handling light to moderate loads in both radial and axial directions. They are commonly used in applications where smooth rotation and low friction are important.

Roller Bearings: Roller bearings have a higher load-carrying capacity than ball bearings. They can support heavier radial and axial loads and are preferred for applications with significant loads or impact forces.

  • Variability:

Ball Bearings: Ball bearings come in various designs, including deep groove, angular contact, and thrust ball bearings, each suitable for different applications.

Roller Bearings: Roller bearings have diverse types, including cylindrical, spherical, tapered, and needle roller bearings, each optimized for specific load and motion requirements.

  • Speed Capability:

Ball Bearings: The reduced friction in ball bearings makes them suitable for high-speed applications, such as electric motors and precision machinery.

Roller Bearings: Roller bearings can handle higher loads but are generally better suited for moderate to low speeds due to slightly higher friction.

  • Applications:

Ball Bearings: Ball bearings are used in applications where smooth motion, low friction, and moderate loads are essential, such as electric fans, bicycles, and some automotive components.

Roller Bearings: Roller bearings find applications in heavy machinery, construction equipment, automotive transmissions, and conveyor systems, where heavier loads and durability are crucial.

In summary, ball bearings and roller bearings differ in their design, friction characteristics, load capacities, speed capabilities, and applications. The choice between them depends on the specific requirements of the machinery and the type of loads and forces involved.

China wholesaler Dac397237 ABS Automotive Wheel Hub Bearing Dac39720037ABS/Bah0106/Dac39720037m Double Radial Ball Bearing   drive shaft bearingChina wholesaler Dac397237 ABS Automotive Wheel Hub Bearing Dac39720037ABS/Bah0106/Dac39720037m Double Radial Ball Bearing   drive shaft bearing
editor by CX 2024-04-16