China best CZPT 30202 30203 30204 30205 30206 Taper Tapered Roller Bearing Rodamientos Rulman carrier bearing

Product Description

35712 35713 35714 35715 35716 Taper Tapered Roller Bearing Rodamientos Rulman

Product Description

Tapered roller bearings refer to radial thrust rolling bearings whose rolling elements are tapered rollers. There are 2 kinds of small cone angle and large cone angles. The small cone angle mainly bears the combined radial and axial loads dominated by radial loads. It is often used in pairs and installed in reverse. The inner and outer races can be installed separately, and the radial and axial clearances can be adjusted during installation and use; The large cone angle mainly bears the combined axial and radial loads, which are mainly axial loads. Generally, it is not used to bear pure axial loads alone but can be used to bear pure radial loads when arranged in pairs (the ends with the same name are installed opposite to each other).

Tapered roller bearings are separable bearings, and both the inner and outer rings of the bearing have tapered raceways. This type of bearing is divided into different structural types such as single-row, double-row, and four-row tapered roller bearings according to the number of rows of rollers installed. Single-row tapered roller bearings can bear radial loads and axial loads in 1 direction. When the bearing is subjected to radial load, an axial component force will be generated, so another bearing that can withstand the axial force in the opposite direction is needed to balance it.

Size range
The basic dimensions of CZPT tapered roller bearings are listed in the dimension data table,

Single-row tapered roller bearings:
Inner diameter size range: 20mm~1270mm
Outer diameter range: 40mm~1465mm
Width size range: 15mm~240mm

Double-row tapered roller bearings:
Inner diameter size range: 38mm~1560mm
Outer diameter range: 70mm~1800mm
Width size range: 50mm~460mm

Four-row tapered roller bearings:
Inner diameter size range: 130mm~1600mm
Outer diameter size range: 200mm~2000mm
Width size range: 150mm~1150mm

Product Parameters

Product Name 

Tapered Roller Bearing


Tapered Roller Bearing


Tapered roller, retainer, inner and outer ring tapered

Applicable Industries

Building materials workshop, construction engineering, machinery maintenance workshop, retail, manufacturing plant, motor,
automobile hub, agricultural machinery

Brand Name




Accuracy Class


Seal Number of Rows

Single row / Double row / Four-row


ZheJiang , China






Long-life High Speed

      Bearing No.                Dimension (mm)               Basic Load     Weight
           Model No. d D T B C r(min) r1(min)
35712 15 35 11.75 11 10 0.6 0.6 0.053
35713 17 40 13.25 12 11 1 1 0.081
32303 17 47 15.25 14 12 1 1 0.133
30303 17 47 20.25 19 16 1 1 0.176
32004X 20 42 15 15 12 10.6 0.6 0.102
35714 20 47 15.25 14 12 1 1 0.127
30304 20 52 16.25 16 13 1.5 1.5 0.179
32304 20 52 22.25 21 18 1.5 1.5 244
32005X 25 47 15 15 11.5 0.6 0.6 0.118
35715 25 52 16.25 15 13 1 1 0.155
32205 25 52 19.25 18 16 1 1 0.188
33205 25 52 22 22 18 1 1 0.225
32305 25 62 25.25 24 20 1.5 1.5 0.386
30305 25 62 18.25 17 15 1.5 1.5 0.273
32305 25 62 25.25 24 20 1.5 1.5 0.386
32006X 30 55 17 17 13 1 1 0.177
35716 30 62 17.25 16 14 1 1 0.236
32206 30 62 21.25 20 17 1 1 0.292
33206 30 62 25 25 19.5 1 1 0.359
30306 30 72 20.75 19 16 1.5 1.5 0.411
32306 30 72 28.75 27 23 1.5 1.5 0.588
320/28X 32 52 16 16 12 1 1 0.15
320/32AX 32 58 17 17 13 3.6 1 0.19
320/32X 35 58 17 17 13 1 1 0.19
32007X 35 62 18 18 14 1 1 0.231
35717 35 72 18.25 17 15 1.5 1.5 0.344
32207 35 72 24.25 23 19 1.5 1.5 0.551
33207 35 72 28 28 22 1.5 1.5 0.551
30307 35 80 22.75 21 18 2 1.5 0.527
32307 35 80 32.75 31 25 2 1.5 0.776
31307 35 80 22.75 21 15 2 1.5 0.518
32008X 40 68 19 19 14.5 1 1 0.282
35718 40 80 19.75 18 16 1.5 1.5 0.434
32208 40 80 24.75 23 19 1.5 1.5 0.554
33208 40 80 32 32 25 1.5 1.5 0.758
30308 40 90 25.25 23 20 2 1.5 0.757
32308 40 90 35.25 33 27 2 1.5 1.06
32009X 45 75 20 20 15.5 1 1 0.354
33109 45 80 36 26 20.5 1.5 1.5 0.563
35719 45 85 20.75 19 16 1.5 1.5 0.502
32209 45 85 24.75 23 19 1.5 1.5 0.597
33209 45 85 32 32 25 1.5 1.5 0.818
30309 45 100 27.25 25 22 2 1.5 1.01
32209 45 100 38.25 39 30 2 1.5 1.43


Detailed Photos



Q1:What is your Before-sales Service?
1>. Offer to bear related consultation about technology and application;

2>.Help customers with bearing choice, clearance configuration, product” life, and reliability analysis;

3>. Offer highly cost-effective and complete solution program according to site conditions;

4>. Offer localized program on introduced equipment to save running cost

Q2: What is your After-sales Service?
1>. Offer training about bearing installation and maintenance;

2>.Help customers with trouble diagnosis and failure analysis;

3>. Visit customers regularly and feedback on their rational suggestions and requirements to the company.

Q3: How about your company’s strength?
contact us by email or trade manager, we will send the free samples according to your request. 

2>. World-Class Bearing:
We provide our customers with all types of indigenous roller bearings of world-class quality.

3>.OEM or Non-Stand Bearings: 
Any requirement for Non-standard roller bearings is Easily Fulfilled by us due to our vast knowledge and links in the industry. 

4>.Genuine products With Excellent Quality: 
The company has always proved the 100% quality products it provides with genuine intent.

5>. After-Sales Service and Technical Assistance: 
The company provides after-sales service and technical assistance as per the customer’s requirements and needs.

6>.Quick Delivery: 
The company provides just-in-time delivery with its streamlined supply chain.

7>.Cost Saving: 
We provide long-life, shock-resistant, and high-reliability roller bearings with excellent quality and better performance.
Resulting in increased cost savings.

Q4: What will we do if you are not satisfied with the product?
A: If have any abnormal, Please contact us at the first time, and we will immediately process

Q5: How long will you respond to our problems?
A: We will respond within 1 hour. 24 hours to solve your problem

Q6: Is optional lubrication provided?
A: We can offer a wide range of oils and greases for a variety of applications. Please contact our engineer for technical
assistance with any special requirements

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Product Name: Auto Bearing
Keywords: Taper Roller Bearing
Precision Rating: P0/P6/P5/P4/P2
US$ 10/Piece
1 Piece(Min.Order)


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roller bearing

Are there specific considerations for choosing roller bearings in applications with varying loads or operating conditions?

When selecting roller bearings for applications with varying loads or operating conditions, there are several specific considerations to keep in mind. These factors ensure that the chosen bearings can effectively handle the dynamic nature of the loads and operate reliably under changing environmental conditions. Here’s a detailed explanation of the considerations for choosing roller bearings in such applications:

  • Load Capacity and Rating:

One of the primary considerations is to ensure that the roller bearings have adequate load capacity to handle the varying loads. The load capacity of a bearing is determined by its size, design, and material composition. It is crucial to analyze the expected maximum and minimum loads, as well as any transient or shock loads that may occur during operation. Manufacturers provide load ratings for their bearings, specifying the maximum loads they can withstand under ideal conditions. By comparing the application’s load requirements with the bearing’s load rating, one can determine if the bearing is suitable for the varying load conditions.

  • Dynamic Load Rating:

The dynamic load rating of a roller bearing indicates the maximum load that the bearing can sustain for a specified number of revolutions, without experiencing excessive fatigue or wear. In applications with varying loads, it is essential to consider the dynamic load rating as the loads change. The bearing should be able to handle the highest expected dynamic loads without premature failure. If the loads exceed the bearing’s dynamic load rating, it may lead to accelerated wear, deformation, or complete failure of the bearing.

  • Static Load Rating:

In addition to the dynamic load rating, the static load rating of the roller bearing is also important. The static load rating indicates the maximum load that the bearing can sustain without permanent deformation when the bearing is stationary or rotating at very low speeds. Even in applications with varying loads, there may be periods when the bearing experiences static or slowly changing loads. It is crucial to ensure that the bearing’s static load rating is sufficient to support these loads without causing plastic deformation or loss of dimensional stability.

  • Operating Temperature:

The operating temperature of the application is another important consideration. Roller bearings may be exposed to varying temperatures due to ambient conditions or the heat generated during operation. It is crucial to choose bearings that can withstand the expected temperature range without degradation of their performance or premature failure. High-temperature applications may require bearings with heat-resistant materials or special lubricants, while low-temperature applications may require bearings with improved low-temperature toughness and lubrication characteristics.

  • Lubrication:

Lubrication plays a critical role in the performance and durability of roller bearings, especially in applications with varying loads or operating conditions. Adequate and appropriate lubrication helps reduce friction, dissipate heat, and prevent wear and corrosion. In applications with varying loads, it is essential to ensure that the chosen bearing can maintain proper lubrication under all load conditions. Considerations should be given to the lubrication type, viscosity, replenishment intervals, and compatibility with the operating conditions.

  • Sealing and Contamination:

In applications with varying loads or operating conditions, the ingress of contaminants, such as dust, dirt, or moisture, can pose a significant challenge to the performance and longevity of roller bearings. Proper sealing or shielding arrangements should be considered to protect the bearings from contamination. Depending on the severity of the environmental conditions, different types of seals or shields, as mentioned in the previous answer, may be required to ensure the desired level of protection.

  • Mounting and Alignment:

Proper mounting and alignment of roller bearings are crucial for their optimal performance and longevity. In applications with varying loads, it is important to ensure that the bearings are mounted correctly and aligned accurately to accommodate the changing loads and prevent excessive stresses. Improper mounting or misalignment can lead to increased friction, uneven load distribution, premature wear, and reduced bearing life. Following the manufacturer’s instructions and using appropriate mounting techniques are essential for ensuring reliable operation under varying load conditions.

In summary, when choosing roller bearings for applications with varying loads or operating conditions, specific considerations include load capacity and rating, dynamic and static load ratings, operating temperature, lubrication requirements, sealing against contamination, and proper mounting and alignment. By carefully considering these factors, engineers can select roller bearings that can reliably handle the varying loads and operate effectively under changing environmental conditions, ensuring optimal performance and durability of the bearings.roller bearing

Can you provide examples of machinery or equipment that rely on precision roller bearings?

Precision roller bearings are indispensable components in various machinery and equipment that require high accuracy, tight tolerances, and smooth operation. These bearings are designed to provide exceptional precision and reliability in demanding applications. Here are some examples of machinery and equipment that rely on precision roller bearings:

  • Machine Tools:

Precision roller bearings are extensively used in machine tools such as milling machines, lathes, grinding machines, and machining centers. These bearings ensure precise movement and positioning of the tooling components, enabling accurate cutting, shaping, and machining operations. The high precision and rigidity of roller bearings contribute to superior machining quality and dimensional accuracy.

  • Robotics:

In robotics applications, precision roller bearings are crucial for achieving accurate and repeatable motion control. They are used in robot joints, arms, and end-effectors to ensure precise movement, positioning, and load handling. Precision bearings enable robots to perform tasks with high accuracy and reliability, making them ideal for industrial automation, assembly lines, and advanced robotic systems.

  • Optical and Imaging Equipment:

Precision roller bearings are employed in optical and imaging equipment, including cameras, telescopes, microscopes, and precision measurement instruments. These bearings support the moving components, such as lenses, mirrors, and stages, ensuring smooth and precise positioning. The high precision and low runout of roller bearings contribute to sharp imaging, accurate measurements, and stable optical performance.

  • Coordinate Measuring Machines (CMMs):

CMMs are used for precise dimensional measurement and inspection in manufacturing and quality control processes. Precision roller bearings are utilized in the moving axes and probe systems of CMMs to provide accurate and repeatable positioning. These bearings enable CMMs to achieve precise measurements with tight tolerances, ensuring the accuracy and reliability of dimensional inspection.

  • Semiconductor Manufacturing Equipment:

In the semiconductor industry, precision roller bearings are critical in wafer handling, lithography systems, and other semiconductor manufacturing processes. They contribute to the precise alignment and movement of components, such as wafer stages, reticles, and masks. The high precision and low runout of roller bearings are essential for achieving the stringent dimensional requirements in semiconductor fabrication.

  • High-Speed Spindles:

Precision roller bearings are employed in high-speed spindles used in various applications, including CNC machining, milling, and grinding operations. These bearings enable the spindles to operate at high rotational speeds while maintaining exceptional precision and stability. Precision bearings ensure minimal vibration, runout, and heat generation, allowing for efficient and high-quality machining processes.

These examples represent just a few of the many machinery and equipment types that rely on precision roller bearings. Other applications include printing presses, textile machinery, medical devices, aerospace systems, and more. Precision roller bearings contribute to the overall performance, accuracy, and reliability of these systems, enabling advanced manufacturing, automation, and technological advancements.

roller bearing

How do roller bearings contribute to reduced friction and smooth rotation in machinery?

Roller bearings play a crucial role in reducing friction and ensuring smooth rotation in machinery. Their design and operating principles contribute to minimizing contact resistance and facilitating efficient motion. Here’s a detailed explanation of how roller bearings achieve reduced friction and smooth rotation:

  • Rolling Motion:

Roller bearings operate on the principle of rolling motion, where the rolling elements (rollers) roll between the inner and outer raceways. This rolling action produces significantly lower friction compared to sliding contact between surfaces. The rolling motion reduces the contact area between the rolling elements and the raceways, resulting in reduced frictional resistance. As a result, roller bearings experience less energy loss and generate less heat during operation, contributing to improved efficiency and reduced wear.

  • Lubrication:

Proper lubrication is essential for reducing friction and ensuring smooth rotation in roller bearings. Lubricants such as oil or grease are used to create a thin film between the rolling elements and raceways. This lubricating film separates the surfaces, minimizing direct metal-to-metal contact and reducing friction. Lubrication also helps to dissipate heat generated during operation and prevent wear and corrosion. Adequate lubrication ensures that roller bearings operate smoothly and with minimal resistance, promoting long service life and reliable performance.

  • Low Friction Materials:

The materials used in roller bearings are carefully selected to minimize friction and enhance performance. The rolling elements and raceways are typically made from high-quality bearing steels that have excellent hardness, strength, and wear resistance. These materials reduce friction and prevent premature wear, ensuring smooth rotation over an extended period. Additionally, the use of low-friction cage materials, such as brass or synthetic polymers, further reduces friction by minimizing frictional contact between the rolling elements and the cage.

  • Precision Manufacturing:

Roller bearings are manufactured with high precision to maintain consistent clearances and minimize internal friction. The dimensions and tolerances of the rolling elements, raceways, and other bearing components are tightly controlled during the manufacturing process. This precision ensures proper alignment and smooth operation of the bearing. By minimizing internal friction and maintaining precise clearances, roller bearings contribute to reduced energy loss and smooth rotation in machinery.

  • Sealing and Contamination Prevention:

Sealing mechanisms are often incorporated into roller bearings to protect them from external contaminants, such as dust, dirt, and moisture. Seals or shields prevent the ingress of contaminants into the bearing, which could increase friction and lead to premature wear. By maintaining a clean and lubricated environment, the seals contribute to reduced friction and ensure smooth rotation. Proper sealing also extends the service life of the bearing and reduces the need for frequent maintenance.

In summary, roller bearings achieve reduced friction and smooth rotation in machinery through their rolling motion, effective lubrication, the use of low-friction materials, precision manufacturing, and sealing mechanisms. By minimizing direct contact, employing efficient lubrication, and maintaining precise clearances, roller bearings optimize the efficiency, reliability, and performance of machinery, leading to smoother operation, reduced energy consumption, and extended service life.

China best CZPT 30202 30203 30204 30205 30206 Taper Tapered Roller Bearing Rodamientos Rulman   carrier bearingChina best CZPT 30202 30203 30204 30205 30206 Taper Tapered Roller Bearing Rodamientos Rulman   carrier bearing
editor by CX 2024-03-29

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