China Professional Double Row Self-Aligning Ball Bearing 2219 Km manufacturer

Product Description

Double Row Self-Aligning Ball Bearing 2219 KM 

Instruction of Self Aligning Ball Bearing:

Self-aligning ball bearings has 2 kinds of structures which are cylindrical bore and tapered bore. The material of the cage can be steel plale or synthetic resine etc. Its speciality is that its outer race are in spherical shape, and with the ability of self-aligning. It can repair the errors caused by different concentricity and deflection ,but its inner and outer ring relative slop is not allowed to be over 3  degrees.
1) self-aligning ball bearing can bear relatively large radical load and some axial load.The raceway of the external ring is spherical surface.

2)This bearing is suitable to bear large load and impact load.

3)This bearing is used in such industries as precision instrument,low-noise electric motor, automobile,motorcy,metallurgy,rolling mill,mine,petroleum,papermaking,cement and common machinery.

Self-aligning ball bearings are constructed with the inner ring and ball assembly contained within an outer ring that has a spherical Self-aligning ball bearing has 2 rows of balls. There is a common spherical raceway whose center of curvature accords with the bearing center. Even through the inner race, the steel balls and the holder incline relative to the outer race, the bearing can rotate. So the bearing is self-aligning, and will not be affected by shaft disalignment relative to the bearing box. The self-aligning ball bearing is mainly subject to radial load. It can also be subject to a minimum of axial load, but it usually can not be subject to pure axial load.
. raceway. This construction allows the bearing to tolerate a small angular misalignment resulting from deflection or improper mounting.

It is particularly suitable for applications where considerable shaft deflections or misalignment are to be expected. Additionally, the self-aligning ball bearing has the lowest friction of all rolling bearings, which enables it to run cooler even at high speeds.                                                         size arrange: Inside diameter range: 25mm-1100mm
                                  Outside diameter range: 52mm-1300mm
                                  Width range: 15mm-300mm


The self-aligning ball bearing is applicable for occasions with sizable shaft flexion or shaft disalignment, such as the transmission shaft of precision meter, quiet motor, car, motorcycle, woodworker and textile machinery. It can also be applied on mining machine, electromechanical device, plastics machinery, office device, medical appliance, body-building and sports goods, and common machine etc. It is 1 of the bearings most widely used in machinery industry.


1. Open self sligning ball bearings of basic design                                                                                                                                    2. Sealed self aligning ball bearings                                                                                                                                                                                      3. Open self aligning ball bearings with an extended inner ring  

More Part Number of Self Aligning Ball Bearing:

Model Dimension(mm) KN Weight(kg)
10000 (TN1,M) 10000K (KTN1,KM) d D B Cr Cor
135   5 19 6 2.5 0.55 0.009
196(V6)   6 15 5 1.6 0.4 0.006
126   19 6 2.5 0.55 0.009
127   7 22 7 2.7 0.65 0.014
108   8 22 7 2.7 0.65 0.014
129   9 26 8 3.9 0.95 0.571
1200 1200K 10 30 9 5.48 1.2 0.035
2200 2200K 30 14 7.12 1.58 0.05
1300 1300K 35 11 7.22 1.62 0.06
2300 2300K 35 17 11 2.45 0.09
1201 1201K 12 32 10 5.55 1.25 0.042
2201 2201K 32 14 8.8 1.8 0.059
1301 1301K 37 12 9.42 2.12 0.07
2301 2301K 37 17 12.5 2.72 0.104
1202 1202K 15 35 11 7.48 1.75 0.051
2202 2202K 35 14 7.65 1.8 0.06
1302 1302K 42 13 9.5 2.28 0.1
2302 2302K 42 17 12 2.88 0.11
1203 1203K 17 40 12 7.9 2.02 0.076
2203 2203K 40 16 9 2.45 0.09
1303 1303K 47 14 12.5 3.18 0.14
2303 2303K 47 19 14.5 3.58 0.17
1204 1204K 20 47 14 9.95 2.65 0.12
2204 2204K 47 18 12.5 3.28 0.15
1304 1304K 52 15 12.5 3.28 0.17
2304 2304K 52 21 17.8 4.75 0.22
1205 1205K 25 52 15 12 3.3 0.14
2205 2205K 25 52 18 12.5 3.4 0.19
1305 1305K 62 17 17.8 5.05 0.26
2305 2305K 62 24 24.5 6.48 0.35
1206 1206K 30 62 16 15.8 4.7 0.23
2206 2206K 62 20 15.2 4.6 0.26
1306 1306K 72 19 21.5 6.28 0.398
2306 2306K 72 27 31.5 8.68 0.5
1207 1207K 35 72 17 15.8 5.08 0.32
2207 2207K 72 23 21.8 6.65 0.44
1307 1307K 80 21 25 7.95 0.54
2307 2307K 80 31 39.2 11 0.68
1208 1208K 40 80 18 19 6.95 0.42
2208 2208K 80 23 31.9 10 0.51
1308 1308K 90 23 33.8 11.2 0.72
2308 2308K 90 33 54 16 0.93
1209 1209K 45 85 19 22.9 7.8 0.47
2209 2209K 85 23 32.5 10.6 0.55
1309 1309K 100 25 39 13.4 0.96
2309 2309K 100 36 63.7 19.3 1.25
1210 1210K 50 90 20 26.5 9.15 0.53
2210 2210K 90 23 33.8 11.2 0.6
1310 1310K 100 27 43.6 14 1.2
2310 2310K 100 40 63.7 20 1.65

About US:

We are the bearing manufacture local in HangZhou City, we are the leading bearing factory in China, and we have 15 years export experience. And our produce equipment are import from Germany, so that our bearings quality level has reached in Europe quality. Our own brand is : ” DEMEK”, also we are usually to help our clients to do the OEM service and customized non-standard bearings. Welcome to send us the inquiry. /* 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

Inner Diameter: 95mm
Outer Diameter: 170mm
Width: 43mm
Gross Weight: 4.2kgs
Cage: Brass
OEM Service: Yes
US$ 20/Piece
1 Piece(Min.Order)

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self aligning bearing

What is the role of cage design and materials in self-aligning bearing performance and durability?

The cage design and materials used in self-aligning bearings play a crucial role in determining their performance and durability. Here’s a detailed explanation:

  • Guiding and Retaining Rolling Elements:

The primary function of the cage in a self-aligning bearing is to guide and retain the rolling elements, such as balls or rollers, in their proper positions. The cage prevents the rolling elements from contacting and rubbing against each other, ensuring smooth and controlled movement within the bearing. By providing precise spacing and alignment, the cage maintains the integrity of the bearing assembly and optimizes load distribution. It also minimizes the risk of damage or premature wear caused by improper positioning or collision of the rolling elements.

  • Reducing Friction and Heat Generation:

The cage design and materials can significantly impact the friction and heat generation within the self-aligning bearing. An efficient cage design ensures proper lubrication distribution by allowing the lubricant to reach all the critical contact points between the rolling elements and raceways. This reduces friction and minimizes the associated heat generation, leading to improved overall bearing efficiency and reduced energy losses. Additionally, the choice of materials for the cage should consider factors such as low friction coefficients and good thermal conductivity to further optimize performance.

  • Maintaining Alignment and Stability:

Self-aligning bearings are designed to accommodate misalignment between the shaft and the housing. The cage plays a vital role in maintaining the alignment and stability of the rolling elements, ensuring that they stay properly seated and aligned during operation. A well-designed cage provides sufficient space and support for the rolling elements to adjust and align themselves, even under dynamic conditions or when subjected to external forces. This enables the self-aligning bearing to continue operating smoothly and efficiently, minimizing the risk of excessive stress, wear, or premature failure.

  • Enhancing Durability and Service Life:

The cage design and materials significantly impact the durability and service life of self-aligning bearings. A robust and durable cage is essential for withstanding the loads, impact forces, and vibrations that can occur during operation. The cage should be resistant to wear, fatigue, and corrosion to ensure long-term performance and reliability. By selecting appropriate cage materials, such as high-strength steels, thermoplastics, or engineered polymers, manufacturers can enhance the durability and service life of self-aligning bearings in various operating conditions.

  • Reducing Weight and Inertia:

The cage design and materials also influence the weight and inertia of the self-aligning bearing. Lighter cage materials, such as certain polymers or composite materials, can help reduce the overall weight of the bearing assembly. This has several benefits, including lower energy consumption, reduced centrifugal forces, and improved dynamic performance. By minimizing the weight and inertia of the cage, self-aligning bearings can operate at higher speeds, exhibit improved response times, and potentially achieve higher levels of performance and efficiency.

Overall, the cage design and materials used in self-aligning bearings are critical factors in determining their performance, durability, and overall efficiency. A well-designed cage facilitates proper guidance and retention of the rolling elements, reduces friction and heat generation, maintains alignment and stability, enhances durability and service life, and contributes to overall weight optimization. By considering the specific application requirements and selecting the appropriate cage design and materials, engineers can optimize the performance and durability of self-aligning bearings in a wide range of industrial applications.

self aligning bearing

What are the potential challenges or limitations associated with using self-aligning bearings in specific industries?

While self-aligning bearings offer many advantages, there are some potential challenges and limitations associated with their use in specific industries. Here’s a detailed explanation of these considerations:

  • Load Capacity:

While self-aligning bearings are designed to handle high loads, there are limits to their load-carrying capacity. In industries with extremely heavy or shock loads, such as heavy machinery, mining, or construction, the load demands may exceed the capabilities of self-aligning bearings. In such cases, alternative bearing designs or additional support mechanisms may be required to handle the extreme load conditions.

  • Speed Limitations:

Self-aligning bearings may have certain speed limitations due to factors such as centrifugal forces, increased friction, or potential instability at high rotational speeds. In industries that require very high-speed applications, such as aerospace or certain manufacturing processes, specialized high-speed bearings may be more suitable to ensure optimal performance and prevent premature failure.

  • Temperature and Environmental Constraints:

Self-aligning bearings have specific temperature and environmental constraints that can impact their performance. In industries involving extreme temperatures, aggressive chemicals, or harsh environmental conditions, the choice of bearing materials and lubricants becomes critical. Certain industries, such as oil and gas, chemical processing, or marine applications, may require specialized bearing designs or coatings to withstand the demanding operating conditions.

  • Maintenance and Lubrication:

Proper maintenance and lubrication are essential for the reliable operation of self-aligning bearings. In industries where access for maintenance is challenging or where frequent maintenance is not feasible, the longevity and performance of self-aligning bearings may be compromised. Additionally, industries with high contamination or abrasive particles in the operating environment may require more frequent lubrication or specialized sealing arrangements to protect the bearings from premature wear and failure.

  • Space Limitations:

Self-aligning bearings have a larger footprint compared to some other bearing designs due to their double-row construction and spherical outer ring raceway. In industries with space constraints or compact machinery designs, the dimensions of self-aligning bearings may pose challenges in terms of integration or fitting within limited spaces. In such cases, alternative bearing designs with smaller profiles may be more suitable.

  • Cost Considerations:

Self-aligning bearings can be more expensive compared to certain other bearing types, especially in applications that require larger sizes or specialized configurations. In industries with cost-sensitive considerations, such as consumer products or automotive manufacturing, the higher cost of self-aligning bearings may influence the selection of alternative bearing options that can meet the application requirements at a lower cost.

While self-aligning bearings offer numerous benefits, it is important to carefully evaluate the specific challenges and limitations in each industry or application. By considering these factors and consulting with bearing experts or manufacturers, the most suitable bearing solution can be selected to ensure optimal performance, reliability, and cost-effectiveness.

self aligning bearing

How do self-aligning bearings compensate for misalignment in machinery?

Self-aligning bearings are designed to compensate for misalignment in machinery, allowing them to accommodate angular misalignment, axial misalignment, and shaft deflection. Here’s a detailed explanation of how self-aligning bearings achieve misalignment compensation:

  • Spherical Outer Ring Raceway:

The key feature of self-aligning bearings is their spherical outer ring raceway. This raceway is designed to have a curvature that matches the spherical shape of the rolling elements, such as balls or rollers. The spherical outer ring raceway allows the bearing to tilt or swivel in response to misalignment, enabling it to self-align with the mating components.

  • Rolling Element Design:

The rolling elements in self-aligning bearings are carefully designed to facilitate misalignment compensation. For example, spherical roller bearings have barrel-shaped rollers, while self-aligning ball bearings have two rows of balls. These rolling elements can adjust their positions within the bearing, redistributing the load and accommodating misalignment between the shaft and the housing.

  • Internal Clearance:

Self-aligning bearings often have a larger internal clearance compared to fixed or non-self-aligning bearings. This additional clearance provides space for the bearing components to move and adjust their positions during misalignment. The internal clearance allows the bearing to properly distribute the load, reduce friction, and prevent excessive stress on the rolling elements and raceways.

  • Flexible Mounting:

Self-aligning bearings offer flexibility in their mounting arrangements. They can tolerate slight misalignments during installation, which simplifies the alignment process. This flexibility is particularly beneficial in applications where thermal expansion, shaft deflection, or other dynamic factors may cause misalignment during operation.

  • Load Distribution:

When misalignment occurs, self-aligning bearings distribute the load more evenly across the rolling elements and raceways. This even load distribution helps reduce localized stresses and minimizes the risk of premature failure. By accommodating misalignment, self-aligning bearings allow for smoother operation and improved reliability in machinery.

It’s important to note that while self-aligning bearings can compensate for certain degrees of misalignment, there are limits to their misalignment capability. Excessive misalignment beyond the bearing’s specified limits can lead to increased friction, reduced bearing life, and potential damage. Therefore, it is crucial to follow the manufacturer’s guidelines and recommendations regarding misalignment limits and operating conditions to ensure optimal performance and longevity of self-aligning bearings in machinery.

China Professional Double Row Self-Aligning Ball Bearing 2219 Km   manufacturerChina Professional Double Row Self-Aligning Ball Bearing 2219 Km   manufacturer
editor by CX 2024-05-13