Product Description

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

 
As a professional supplier with 10 years experience, we can supply wide range of clutch release bearing for trucks, buses and tractors. Our aim is to bring very high quality products and one-stop service for all the customers worldwide. 

If you are looking for any clutch release bearing, just please let us know OEM part number or send us photos, we will give you reply within 24 hours.

*Advantage

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.  

Bearing Number

Boundary dimensions(mm)

Basic load ratings(kN)

Limiting speeds(rpm)

Mass(Kg)

HJR

d

D

B

rs min

rs1 min

Cr

Cor

Grease

Oil

(Approx.)

NU2204E

NJ2204E

20

47

18

1

0.6

30.5

28.3

14,000

16,000

0.158

NU2205E

NJ2205E

25

52

18

1

0.6

35

34.5

11,000

13,000

0.186

NU2206E

NJ2206E

30

62

20

1

0.6

49

50

9,700

11,000

0.297

NU2207E

NJ2207E

35

72

23

1.1

0.6

61.5

65.5

8,500

10,000

0.455

NU2208

NJ2208

40

80

23

1.1

1.1

58

62

8,500

10,000

0.49

NU2208E

NJ2208E

40

80

23

1.1

1.1

72.5

77.5

7,600

8,900

0.552

NU2209

NJ2209

45

85

23

1.1

1.1

61.5

68

7,600

9,000

0.53

NU2209E

NJ2209E

45

85

23

1.1

1.1

76

84.5

6,800

8,000

0.6

NU2210

NJ2210

50

90

23

1.1

1.1

64

73.5

6,900

8,100

0.571

NU2210E

NJ2210E

50

90

23

1.1

1.1

79.5

91.5

6,200

7,300

0.652

NU2211

NJ2211

55

100

25

1.5

1.1

75.5

87

6,300

7,400

0.773

NU2211E

NJ2211E

55

100

25

1.5

1.1

97

114

5,600

6,600

0.968

NU2212

NJ2212

60

110

28

1.5

1.5

96

116

5,800

6,800

1.06

NU2212E

NJ2212E

60

110

28

1.5

1.5

131

157

5,200

6,100

1.21

NU2213

NJ2213

65

120

31

1.5

1.5

120

149

5,400

6,300

1.4

NU2213E

NJ2213E

65

120

31

1.5

1.5

149

181

4,800

5,600

1.6

NU2214

NJ2214

70

125

31

1.5

1.5

119

151

5,000

5,900

1.47

NU2214E

NJ2214E

70

125

31

1.5

1.5

156

194

4,500

5,200

1.7

NU2215

NJ2215

75

130

31

1.5

1.5

130

162

4,700

5,500

1.55

NU2215E

NJ2215E

75

130

31

1.5

1.5

162

207

4,200

4,900

1.79

NU2216

NJ2216

80

140

33

2

2

147

186

4,400

5,100

1.93

NU2216E

NJ2216E

80

140

33

2

2

186

243

3,900

4,600

2.12

NU2217

NJ2217

85

150

36

2

2

170

218

4,100

4,800

2.44

NU2217E

NJ2217E

85

150

36

2

2

217

279

3,700

4,300

2.68

NU2218

NJ2218

90

160

40

2

2

197

248

3,900

4,600

3.1

NU2218E

NJ2218E

90

160

40

2

2

242

315

3,500

4,100

3.33

NU2219

NJ2219

95

170

43

2.1

2.1

230

298

3,600

4,300

3.79

NU2219E

NJ2219E

95

170

43

2.1

2.1

286

370

3,300

3,800

4.14

NU2220

NJ2220

100

180

46

2.1

2.1

258

340

3,500

4,100

4.57

NU2220E

NJ2220E

100

180

46

2.1

2.1

335

445

3,100

3,600

5.01

NU2222

NJ2222

110

200

53

2.1

2.1

320

415

3,100

3,700

6.56

NU2222E

NJ2222E

110

200

53

2.1

2.1

385

515

2,800

3,300

7.4

NU2224

NJ2224

110

200

38

2.1

2.1

293

365

3,100

3,700

4.27

NU2224E

NJ2224

120

215

58

2.1

2.1

350

460

2,900

3,400

8.19

NU2224E

NJ2224E

120

215

58

2.1

2.1

450

620

2,600

3,000

9.18

NU2226

NJ2226

130

230

64

3

3

380

530

2,600

3,100

10.2

NU2226E

NJ2226E

130

230

64

3

3

530

735

2,300

2,700

11.8

NU2228

NJ2228

140

250

68

3

3

445

635

2,400

2,800

12.9

NU2228E

NJ2228E

140

250

68

3

3

575

835

2,100

2,500

15.8

NU2230

NJ2230

150

270

73

3

3

500

710

2,200

2,600

16.3

NU2230E

NJ2230E

150

270

73

3

3

660

980

2,000

2,400

19.7

 

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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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tapered roller bearing

Can you Explain the Concept of Bearing Clearance in Tapered Roller Bearings?

Bearing clearance, also known as internal clearance, refers to the space or gap between the various components of a tapered roller bearing when it is not under load. This clearance exists to accommodate the thermal expansion of the bearing components, ensure proper lubrication, and prevent excessive interference during operation. Here’s how bearing clearance works in tapered roller bearings:

  • Thermal Expansion:

As tapered roller bearings operate, they generate heat due to friction and loading. This heat causes the bearing components, including the inner and outer rings, rollers, and cage, to expand. Bearing clearance provides the necessary space for these components to expand without causing binding or excessive load on the rolling elements.

  • Lubrication Film:

The lubricant within the bearing forms a thin film between the rolling elements and raceways. Bearing clearance ensures that the rolling elements can move smoothly within this lubrication film, reducing friction and wear.

  • Operating Conditions:

Bearing clearance affects the behavior of the bearing under different operating conditions. Excessive clearance can lead to vibration, noise, and reduced load-carrying capacity, while insufficient clearance may result in increased friction, heat generation, and premature failure.

  • Types of Clearance:

Tapered roller bearings can have various types of clearance, including radial clearance (between the rollers and raceways) and axial clearance (along the bearing axis). The choice of clearance depends on the application’s requirements and the desired balance between load capacity and internal stress.

  • Preload vs. Clearance:

Preload, which is the application of a controlled axial force, eliminates internal clearance and optimizes the distribution of load between rolling elements. In contrast, bearing clearance provides the necessary space for thermal expansion and lubrication, albeit at the cost of increased play.

  • Application-Specific Considerations:

The optimal bearing clearance varies depending on factors such as the application’s operating temperature, speed, and load magnitude. Engineers carefully select the appropriate clearance to ensure optimal bearing performance.

  • Measuring Clearance:

Bearing clearance can be measured using specialized instruments or techniques that assess the gap between components when the bearing is not under load.

Proper bearing clearance is crucial to maintaining optimal performance, minimizing wear, and preventing premature failure in tapered roller bearings. It is a critical factor that engineers consider when selecting and designing bearings for specific applications.

cylindrical roller bearing

How do cylindrical roller bearings perform in high-speed or high-temperature environments?

Cylindrical roller bearings are designed to perform reliably in high-speed or high-temperature environments, although their performance may be influenced by various factors. Let’s explore how cylindrical roller bearings perform under these conditions:

  • High-Speed Environments:

In high-speed environments, cylindrical roller bearings are subjected to increased centrifugal forces and higher operating temperatures. To accommodate these conditions, several design features are employed:

  • Cage Design:

Cylindrical roller bearings intended for high-speed applications often feature optimized cage designs. The cage, or retainer, holds the cylindrical rollers in position and prevents excessive friction and heat generation. Cages made of lightweight materials such as phenolic resin or engineered plastics help reduce inertia and minimize cage wear at high speeds.

  • Roller and Raceway Geometry:

The roller and raceway profiles are designed to minimize sliding friction and ensure proper roller guidance. Special attention is given to the surface finish and precision of these components to reduce friction and minimize heat generation. Additionally, high-speed cylindrical roller bearings may have specific modifications, such as optimized roller end profiles and surface coatings, to further enhance their performance in high-speed applications.

  • Lubrication:

Proper lubrication is crucial in high-speed environments to reduce friction, dissipate heat, and prevent premature wear. High-speed cylindrical roller bearings often require lubricants with specific properties, such as low viscosity and excellent thermal stability, to ensure effective lubrication under high-speed conditions. Lubrication methods, such as oil-air lubrication or oil mist lubrication, may be employed to provide sufficient lubricant supply to the bearing at high speeds.

  • High-Temperature Environments:

When operating in high-temperature environments, cylindrical roller bearings face challenges related to elevated temperatures and potential thermal expansion. To address these challenges, the following considerations are taken into account:

  • Bearing Materials:

High-temperature cylindrical roller bearings are often made from heat-resistant materials that can withstand elevated temperatures without compromising their mechanical properties. Common materials include high-temperature steels, heat-resistant alloys, or ceramics. These materials offer improved dimensional stability and resistance to thermal expansion, ensuring the bearing’s performance and longevity.

  • Lubrication:

Proper lubrication becomes even more critical in high-temperature environments. Lubricants with high-temperature stability, such as synthetic oils or greases specifically formulated for high temperatures, are used to maintain adequate lubrication properties and prevent premature lubricant degradation. Lubrication intervals may need to be adjusted to ensure sufficient lubricant replenishment under high-temperature conditions.

  • Clearance and Preload:

In high-temperature environments, the bearing’s internal clearance or preload may be adjusted to compensate for thermal expansion. Proper clearance or preload selection helps maintain the desired operating conditions and prevents excessive bearing play or preload loss due to thermal effects.

It’s important to note that the specific performance of cylindrical roller bearings in high-speed or high-temperature environments can vary depending on factors such as the bearing size, design, operating conditions, and the presence of additional cooling or heat dissipation measures. Consulting bearing manufacturers’ recommendations and considering the application requirements are crucial for selecting the appropriate cylindrical roller bearings for high-speed or high-temperature applications.

cylindrical roller bearing

Can you explain the design and structure of cylindrical roller bearings?

Cylindrical roller bearings have a specific design and structure that enables them to handle high radial loads and moderate thrust loads. Let’s explore the key components and features of cylindrical roller bearings:

  • Inner and Outer Rings:

The inner and outer rings of cylindrical roller bearings are typically made of high-quality bearing steel. The inner ring is mounted on the rotating shaft, while the outer ring is usually mounted in a stationary housing. The rings are precision-machined with raceways that serve as the contact surfaces for the cylindrical rollers.

  • Cylindrical Rollers:

Cylindrical rollers are the main load-carrying components of the bearing. They are cylindrical in shape and have a high length-to-diameter ratio. The rollers are precision-ground to ensure close tolerances and uniform size distribution. The large contact area between the rollers and the raceways allows for efficient load distribution and reduced stresses.

  • Cage:

A cage, also known as a separator, is used to keep the cylindrical rollers evenly spaced and prevent them from coming into contact with each other. The cage is typically made of steel or other materials such as brass or polyamide (nylon). It provides guidance and retains the rollers in position during operation, ensuring smooth rolling motion and preventing roller skewing or jamming.

  • Flanges:

Cylindrical roller bearings may have flanges on the inner or outer rings or both. Flanges are raised edges or shoulders that provide axial guidance and help in locating the bearing in the axial direction. The presence of flanges can also improve the overall rigidity and axial load-carrying capacity of the bearing.

  • Internal Clearance:

The internal clearance of cylindrical roller bearings refers to the space between the rollers and raceways when there is no external load applied. It affects the bearing’s thermal expansion, running accuracy, and ability to accommodate misalignment or axial displacement. Different levels of internal clearance are available to suit specific application requirements.

  • Lubrication:

Cylindrical roller bearings require proper lubrication to minimize friction, reduce wear, and dissipate heat generated during operation. Lubrication helps to maintain the separation between the rolling elements and raceways, preventing metal-to-metal contact and minimizing the risk of premature failure. Common lubrication methods include grease lubrication and oil lubrication.

  • Sealing and Protection:

Cylindrical roller bearings can be equipped with various types of seals or shields to prevent the ingress of contaminants and retain lubrication. These seals and shields help to extend the bearing’s service life and maintain its performance by providing protection against moisture, dust, and other external factors that could cause damage or deterioration.

Overall, the design and structure of cylindrical roller bearings allow them to efficiently handle radial loads and moderate thrust loads. The combination of inner and outer rings, cylindrical rollers, cage, flanges, internal clearance, lubrication, and sealing work together to provide reliable and smooth rotational motion in machinery applications.

China high quality Nj2204e Cylindrical Roller Bearing Nj2205e/Nj2206e/Nj2207e/Nj2208e/Nj2209e/Nj2210e/Nj2211e/Nj2212e/Nj2213e/Nj2214e/Nj2215e/Nj2216e/Nj2217e/Nj2218e/Nj2219e   bearing exampleChina high quality Nj2204e Cylindrical Roller Bearing Nj2205e/Nj2206e/Nj2207e/Nj2208e/Nj2209e/Nj2210e/Nj2211e/Nj2212e/Nj2213e/Nj2214e/Nj2215e/Nj2216e/Nj2217e/Nj2218e/Nj2219e   bearing example
editor by CX 2024-02-16