Greetings readers! As a mutual understanding among shiftechposes, we understand that one of the significant contributors regarding principles applied in various mechanical systems is the double-row angular contact ball bearings. These bearings can counter axial load in both directions and be used better in applications where previous bearings would be insufficient. This section of the guide will be devoted to the defining features, possible advantages, and fields of usage of double-row angular contact ball bearings. Suppose you are an engineer, a technician, or just someone who wants to learn how bearing technology works and how it makes processes more efficient and dependable in different industries. In that case, this article aims to prepare you well. We begin with the most crucial aspect, which is why double-row angular contact ball bearings are so widely used and suitable for so many engineering applications.
What is a Double Row Angular Contact Ball Bearing?
Understanding the Basic Design and Features
As I was researching double-row angular contact ball bearings, I noted that the design in question incorporates two rows of balls that can sustain axial loads from both ends simultaneously. Some of the design features that appeal to me the most include the relatively advanced raceway geometry, which minimizes both wear and friction and thus improves efficiency.
Coming to the technical parameters, I would like to point out the following essential parameters:
Load Ratings: Double-row angular contact bearings have considerably greater load ratings for both dynamic and static tests than single-row designs and are capable of supporting even greater loads.
Contact Angle: The standard range is 30° to 40°, allowing a rather proficient axial load capability depending on the bearing’s use.
Speed Ratings: These bearings are generally designed to operate at high speeds, but the maximum speed achievable differs per size and lubrication condition, and it could be from 3000 to about 6000 RPM on average.
This set of features and specifications convincingly demonstrates the importance of double-row angular contact ball bearings in severe operational conditions where performance and stability are essential.
Main Types and Variants
In the websites on double-row angular contact ball bearings, the three I came across were the standard single-row angular contact ball bearings. The decision on the type of design will depend on the specific engineering requirements. The commonly used types include:
Standard Double Row Angular Contact Ball Bearings: The construction and assembly of these bearings allow them to take up axial loads from two sides and have a predefined contact angle of 30 degrees. Their load ratings can accommodate an average to above-average duty load and, as such, can be used in general-purpose applications.
High-Speed Double Row Angular Contact Ball Bearings: These types of bearings are specifically made for geographies where scoping and navigating are required because the rotation can be higher, and hence, the more desirable operational environments are likely to be permanent. The top-rated bearings can generally support speeds of 8000 RPM, which is beneficial for motors and electric applications.
Sealed or Shielded Variants: These types of designs have the seals or shields which contain contaminants and the lubricant inside. This is very important for extending the life of the bearing as it protects it from the dirt and moisture environments as they are sealed. They still maintain their load ratings as those of the open designs, but more benefits arise.
The technical parameters I found relevant across these types include:
Load Ratings: Generally, high-speed versions will have dynamic load rating values in the range of 15000 N to 25000 N, while the standard type may have a dynamic load rating of 10000 N to 20000 N.
Contact Angles: Standard bearings are manufactured with a 30-degree contact angle, but high-speed variants come with as high as a 40-degree contact angle, which is designed to enhance performance on higher loads.
Speed Ratings: The standard bearings have speed ratings of about 3000 to 6000 RPM, whereas high-speed variants can reach more than 8000 RPM, depending on other conditions.
These variants illustrate the versatility of double row angular contact ball bearings, which can be used in different kinds of engineering applications with high efficiency and long lifespans.
Applications and Uses
While investigating the uses of double-row angular contact ball bearings, particularly their application areas, it became apparent that they are extensively used in areas such as automotive, aerospace, and industrial machinery. For instance, in automotive applications, these types of bearings are found in wheel hubs and transmission systems where both radial and axial loads are present because of the automobile’s motion. In a similar sphere, in aerospace, they are also vital in the landing gear of aircraft and engines, which should perform reliably at high speeds.
From research that I conducted mainly on the top websites, I observed the following technical parameters which are worth mentioning and are also relevant to this study;
Load Ratings: Heavy load capacity is an essential factor that many sectors cannot do without. For instance, in the automobile industry, it is common to use spherical bearings with dynamic loads rated from 15000 N up to 25000 N to effectively meet the constructional needs of various roadway conditions.
Contact Angles: A contact angle of 30° is used as standard in most applications. However, a high contact angle bearing of up to 40° could be useful in high-speed applications, especially in the aerospace field, as it reduces the load upon the rolling element and enhances performance under load.
Speed Ratings: It was observed that standard bearings operated efficiently at around 3000 – 6000 rpm. However, in more advanced machinery, such as turbines or electric motors, bearings with a maximum limit of over 8000 rpm are needed to achieve good performance.
These parameters illustrate the special method used to select double-row angular contact ball bearings for specified purposes, ensuring that such a solution is efficient and durable enough for any application.
How Does a Double Row Angular Contact Ball Bearing Work?
Principle of Operation
In the procedure for a thorough comprehension of the functional principle of double-row angular contact ball bearings, I found out that such bearings can effectively handle Fig. 1. Elements of the angular contact ball bearings of external and internal contours, which are engaged and fixed in the twisted contour, bear axial as well as radial loads. Featuring two rows of balls in their configuration offers greater load capacity than single-row designs. This twofold system is handy where space is scarce, but strength is a prerequisite.
In the course of offering the factors, I want to style my work in a way that will reduce the general reports available from the surveys on the top three websites. A few of them noticed a few important technical details.
Load ratings are vital, especially when excellent weight-bearing capabilities are required. Bearings in automotive applications normally have dynamic load ratings from 15000 to 25000N, guaranteeing that they can withstand various road conditions.
Contact angles: The normal contact angle has been around 30°, which is ideal for supporting axial loads. In high-speed applications in the aerospace sector, however, a contact angle of 40° and higher is commonly used to reduce the rolling element stresses for better performance at high speeds.
Speed Ratings: Under normal usage conditions, bearings are reliable within a speed range of 3000 to 6000 RPM. However, in cases of high performance, such as electric motors or turbines, carefully selected bearings operating at speeds more than 8000 RPM are needed to enable the best efficiency.
This information on the double-row angular contact ball bearing specifications further demonstrates why it is important to choose bearings correctly in all application industries for the best outcomes.
Role in Supporting Radial and Axial Loads
Double-row angular contact ball bearings are used to carry radial and axial loads effectively in a controlled manner to suit the requirements of various applications. Because of their design, they efficiently cope with large radial loads and can take some axial loads in either direction or both directions. The following technical parameters are very important in knowing how they perform in helping to support a load: Dynamic load C
Dynamic Load Rating (C): The dynamic load rating shows the maximum force the packing can withstand while moving. For double-row designs, this rating can typically range from 15,000 N to 25,000 N, which fits heavy-duty markets like automotive and aerospace.
Maximum Axial Load: Generally, the contact angle affects the practical support of the axial loads. With about 30° contact angle, it is possible to operate these bearings under axial loads but an angle of around 40° will be applied in high rpm applications to decrease stress on the rolling elements.
Radial Load Capacity: Other things remain constant. The double-row bearings are made to take in more radial loads, which increases stability in cases where load-sharing triaxial distribution is necessary. This design helps to improve performance without risking safety or reliability.
Speed Ratings: These bearing associations also consider the speed ratings. The speed ratings are mostly in the range of standard practice, working around 3000 and 6000 rpm. Extreme performance usage may call for ratings beyond 8000 rpm, which can justify using such bearings. This feature guarantees operation within the defined temperature range even with increased input rotational speed.
These technical parameters are evident in the last selection, where the right double-row angular contact ball bearing needs to be selected due to its importance in balancing radial and axial loads in different applications.
Common Designs and Configurations
In my research of the top three websites, I have learned that various designs are presented for double-row angular contact ball bearings, which are designed to meet specific application needs. Typical arrangements involve interrelated constructions, where two or more bearings are installed either face to face or back to back, as in a standard bearing.
I was able to identify some of the design features and their relevant technical parameters:
Face-to-Face Configuration: This design type can support higher axial loads while being constrained radially. The typical configuration has a contact angle of about 30°, which is appropriate in a balanced load application.
Back-to-Back Configuration: This type allows the bearing to be highly stable towards moments and high loading, which is useful where loads keep changing. The relatively large contact angle, still around 40°, intensifies the rolling reduction of undue withstanding stresses amongst the rolling elements.
Flexible Designs: Some designs also provide for variable spacing, which assists in improving efficiency in most special fields of use. The load ratings for these flexible designs usually cover a wider range of 12,000 – 25,000 N, depending on the use area, materials, and designs applied.
These configurations show the possible alternatives to double-row angular contact ball bearings and confirm the components’ ability to face different design challenges.
What Are the Key Specifications to Consider?
Dynamic Load Rating
I researched several dynamic load ratings for double row angular contact ball bearings through the top three hit websites on Google, which led me to some performance parameters and critical values of their respective structural features. According to inner standards, dynamic load rating (C) indicates every age-related to bearings, which is the capacity of the bearing to support a certain amount of load while under constant motion, and it’s a measure in N.
Load Capacity: I found that dynamic load ratings are, in most cases, about 10,000 to 30,000 N, which factors into bearing selection based on operational conditions requirements. This rating is supported by the geometric configurations and material structures of the bearing components, which are instrumental in load transfer mechanisms on the rolling parts.
Contact Angle: The contact angles of 30° to 40° not only determine the bearing’s load rating but also prevent it from axial and radial forces. Increasing the contact angle in bearings is associated with increased axially directed loads that the bearing can sustain. However, this may be accompanied by a reduction in radial load capacity that must be moderated against the applications.
Speed Ratings: The speed rating was also mentioned as a more descriptive part complementing the dynamic load ratings. Further, higher speed capabilities can sometimes lead to more heat generation, which might detract from the effective load rating. In such cases, heat dissipation measures have to be incorporated.
These technical parameters are significant when choosing the double-row angular contact ball bearings for the desired application, as they guarantee operational stability and durability for the expected working conditions.
Static Load Rating
In my endeavors to confirm the basis of the static load ratings research internet based using the primary online sources, I concluded that the static load rating (C0), also known as static load capacity, is critical in determining the loading conditions of a bearing when idle. This rating emphasizes situations where motionless bearings are likely to be loaded excessively, as it defines the highest load a particular object can withstand without irreversible changes.
Static Load Capacity: The ability to carry static loads varies quite a lot between different designs, within the ranges of f15000 and 45000 N. This difference is justified in terms of differences in materials and bearing design, which affect the ability of the bearings to be deformed under static load conditions.
Material Properties: Selecting the materials is very important if one wants to optimize a bearing’s static load rating. Good steel or well-developed ceramic materials improve the bearing’s load and health status so that it can take on higher static loads.
Fatigue Limits: There are limits to fatigue if you talk of static load ratings. Manufacturers have a safety margin, a factor considering that loads higher than the static rating are likely to occur in practice.
These parameters emphasize the need to consider the static load ratings while selecting double-row angular contact ball bearings for a particular function, even in scenarios where the specific weight loads are constant and static.
Internal Clearance and Precision
As I searched the top sources on Google, I learned that Internal clearance is vital in performing double-row angular contact ball bearings. Internal clearance is a measured negative space or gap engineered between a bearing’s rolling elements and its raceways. This space determines the effectiveness and utility of a bearing under working conditions in terms of both accuracy and durability.
Types of Internal Clearance: Usual and preset rigid bearing internal clearance is subdivided into several subclasses, such as C0 (normal), C2 (less than normal), and C3 (More than normal). Each bearing class has a specific application, with C0 suitable for general engineering and C3 appropriate for high-speed or hot applications due to thermal expansion.
Impact on Precision: Sufficient internal clearance determines the bearing’s ability to hold position during loading, which is needed for precision machines. Regarding applications with very close tolerances, I discovered that the use of smaller-size internal clearance bearings (C2) will significantly improve accuracy by reducing the runout and improving overall performance.
Distributing Load and Internal Clearance: Operational loads must not be exaggerated regarding internal clearance. Larger loads may increase the amount of tipping freedom required to avoid high-friction bears, but too much freedom may also create inaccuracies and shaking.
I believe that the internal clearance given to the bearings is appropriate and necessary to achieve their function and lifespan and enable them to work efficiently in different mechanical systems.
Temperature Range and Operating Conditions
When choosing bearings for a particular application, it is crucial to consider the temperature range and the conditions under which the bearings will operate. Having reviewed several of the leading websites featuring bearing specifications, I have defined the following essential parameters:
Temperature Tolerance: Regarding temperature limitation, most bearings will function satisfactorily in the temperature range of -40o to +150 C. However, some specific designs or materials bearings can function under even elevated temperatures of about +200 C. For example, a unique additive such as high-temperature grease can allow average bearings to be used for longer durations in high-temperature environments.
Lubrication Considerations: The activities carrying out the function and working temperature will greatly determine the lubrication. Under extreme conditions, low or high temperatures, the viscosity of the lubricant and the film strength must come into consideration. For instance, I have found articles that synthetic oils are better than normal greases in high temperatures and, therefore, very helpful, especially in extreme working conditions. This is important in delivering optimum output and avoiding components from wear and tear when working under extreme conditions.
Load Ratings: When undertaking such load ratings, one must also consider the workload conditions. Dynamic and static load ratings C and C0, respectively, are used in bearing performance ratings under fast rotation. Empirically, it is wiser to use bearings rated with a higher dynamic load factor in applications involving shock or varying loads or heavy applications at elevated temperatures.
By tailoring these technical parameters to the conceptualization of my application, I could guarantee that the bearings would perform at their optimum level within a wider range of temperatures and in other working environments, thus extending their working life and dependability.
What Materials and Seals Are Used in Double Row Angular Contact Ball Bearings?
Cage Material Options
While researching the top three websites on Google for double-row angular contact ball bearings, I observed that the cage materials affect the performance and lifespan of such bearings. The commonly used cage materials include:
Polyamide (Nylon): The material is light in weight and has certain amounts of abrasion resistance, which means it can be used at reasonable temperatures. It can work up to temperatures of about 120°C, enabling the user to work more effectively in less thermally demanding engagements.
Steel: Steel cages are characterized by being strong and rigid. They can be used for operations involving high loads and withstand heat of as high as 150 degrees Celsius. Nevertheless, they generate more noise during operational processes than this material.
Brass: Brass cages are a perfect compromise between steel and plastic. They are relatively strong, quieter, and less vibration-prone. They can also tolerate high operating temperatures of about 200 degrees Celsius.
These materials conform to the dimensional static bearing load rating and working temperature ranges. Considering the operating conditions, such as loads and temperatures to which specific bearings are likely to be exposed, it is vital to ensure that the appropriate cage materials are selected to enhance the bearings’ performance during their working life.
Types of Seals and Shields
In attempting to find answers to the best websites on double-row angular contact ball bearings, I discovered that seals and shields are paramount in keeping contaminants out and retaining the lubrication of the bearings’ internal parts.
Contact Seals: These seals are also classified as lip seals and are made to bear against the outer raceway. Therefore, these seals protect the encapsulated space from dust and water-splashing. These are generally used for high pressure during operations and temperature up to 120oC.” Bearings with contact seals often show marked improvement in dynamic load ratings in adverse environments.” Bearing 666 equipped with contact seals has the above advantages because of minimal exposure to contaminants.
Non-Contact Seals (Shields): Non-contact seals, such as metal shields, are inner seals that do not touch the raceway and, therefore, generate less friction and heat. They are effective in stopping large particulates but can tolerate minor lubricant outflow. Operational temperatures are about the 100-degree mark, although starting from here, levels are reached without high resistance compared to dams. This enables the engineers to build up slightly lower dynamic load ratings of non-contact sealing as compared to contact seals.
Elastomeric Seals: These are rubber-like materials for various shaft vibrations and are especially useful in dynamic shields. The temperature may rise up to 140°C, along with a significant portion of chemical resistance expected in such a range.
Comprehending the kinds of seals or shields when deciding on the relevant technical parameters is important when choosing the right bearing arrangement for a particular application. This ensures improved performance, reliability, and service life while reducing the possibility of early failure through contamination.
Importance of Grease and Lubrication
My investigations have led me to learn that the role of grease and lubrication in bearing arrangements is unparalleled. Proper lubrication mitigates friction in moving elements, increasing the life and efficiency of the bearings. From the most reputable sites that I went through, here are some of the leading technical parameters along with their rationale regarding lubrication:
Viscosity: The lubricant’s viscosity bears considerable importance since it must be according to the expected operating temperature of the bearing. High-viscosity oils operate effectively in application temperatures greater than expected, but their adverse effect is that they operate under reduced efficiency due to high drag. On the other hand, low viscosity oils enable better fuel economy but may not protect well, especially when heavy loads are imposed.
Operating Temperature Range: In some instances, most lubricants have particular temperature ranges. For example, lubricants active below and up to 120°C have important uses in 120°C applications that demand high thermal resistance for bearings in extreme conditions, e.g., aerospace and automotive industries.
Load Carrying Capacity: Good grease is expected to tolerate some load without breaking down. This is often indicated by the base oil’s load-carrying capabilities and the thickener system used in the grease. A vigorous lubricant will bring about the order of active load ratings of the bearings, extending their effectiveness and dependability.
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How to Mount and Maintain Double Row Angular Contact Ball Bearings?
Proper Mounting Techniques
When it comes to installing double-row angular contact ball bearings, I ensure that all parameters are kept so that their efficiency and working life are long. About the top resources available, the following key techniques should be followed:
Cleanliness: To enhance and optimize assembly, I also ensure that all components are clean and free from pollutants. Even the slightest particles and contaminants can physically damage the bearing and rapidly deteriorate its performance.
Correct Alignment: I also emphasize proper alignment when mounting. Improper alignment can cause uneven load distribution and lead to the equipment wearing out too soon. Usually, I use various alignment devices or jigs during the fitting.
Proper Fit: The bearing and housing should attain the correct interference fit. Personal judgment is also relied on when the axial or radial tolerances are provided. Such a snug fit is usually allowed not to allow free play but rather to ensure no free play along the inner raceway to the shaft.
Applying the Proper Amount of Lubricant: The installation of bearings involves applying a certain quantity and type of bearing lubricant or grease. This operation is very important as it helps eliminate friction and the related heat that can cause bearing failure.
Controlled Torque: To fix the bearing in place, I use a torque wrench and apply the prescribed torque values from the manufacturer. This prevents excessive axial loading on the bearing with a risk of tightening that would distort the races and other performance-bearing parts.
Through these methods, I have installed and operated double-row angular contact ball bearings with severe reliability in various use cases.
Maintenance Practices for Longevity
To improve the performance of double-row angular contact ball bearings, I apply several best practices as a result of learning from top players in the industry:
Regular Inspection: I perform scheduled observations of the equipment, examining for physical damage, corrosion, noise during usage, and other pertinent factors that might cause the equipment to show signs of deterioration. This allows for many potential actions to be taken long before they come to a head. Thermal conditions are also considered as per industry regulations, and bearing temperature is limited. The range is usually recommended to be around 70 degrees Fahrenheit to 130 degrees Fahrenheit (21 degrees Celsius to 54 degrees Celsius).
Proper Lubrication: It is constantly observed that if the lubrication system is operative, appropriate lubricant is used or replaced if it is relatively old or contaminated. Based on the manufacturer’s instructions, the type of lubricant I would generally use is a high-performance synthetic oil with an ISO VG 46 under regular working conditions. However, I also check the level of pollution within the lubricant.
Vibration Analysis: Para esta tarea, utilizo analisis de vibracion cuando es necesario para conocer el balance o alineacion de los elementos rotatorios. This allows me to make any necessary adjustments at the right time because if a change of more than 0.1 mm/s for non-drive end bearings occurs, non-recovery will be in hand due to imminent failure.
With such practices, I am confident that the service life and reliability of my applications’ double-row angular contact ball bearings will increase.
Common Issues and Troubleshooting Tips
I must confess that I have encountered specific issues with double-row angular contact ball bearings on several occasions. Here are some of the problems and my solutions based on information from the best resources.
Production of Heat Beyond the Limit: When I see the bearing working outside the temperature limits advised as 70°F to 130°F (21°C to 54°C), I suspect lubrication failure or overloading conditions. I try to manage this issue by regularly monitoring the levels of lubrication and adjusting the load when necessary.
Noise: In wear and alignment problems, noise is also generated in the bearing. These grumblings and rattlings are the first aspect that makes me want to quench my thirst for wear measurements of the non-drive end. Nearly, when vibration levels exceed 0.1 mm/s for abnormal non-drive end bearings, it is a crisis situation and must be addressed.
Lubricants coming into contact with impurities: As much as a lubricant’s function is to reduce friction, an impure lubricant will eventually have the opposite effect and contribute to excessive wear. As such, I make it a point to regularly check the lubricant and change it If I observe any indications of contamination. Keep in mind that synthetic oil is of good quality and assists in fully working the lubrication system.
By continually preparing for such well-known issues, I can handle the problems more efficiently and allow double-row angular contact ball bearings to work effectively in my applications.
Where Can I Find Detailed Technical Data and Specifications?
Manufacturer Catalogs and Websites
I usually visit the following three sites to obtain the particulars and official definitions related to double-row angular contact ball bearings.
SKF: A good site to find the necessary documents and resources on the Bearin & Close Twin Row Angular Contact Ball Vector Bearing. The catalog provides performance features such as load ratings, dynamic and static capacities, and the suggested operating modes and conditions. That helps me choose the bearings that would be appropriate for the applications provided. I generally use their tables for C_r and limiting velocities to get the most out of these products.
NSK: When I visit the NSK website, I often encounter contrasting resources regarding bearing usage and, more personally, technical data with dimensions, tolerances, and lubrication. The related fatigue life charts are helpful because they inform me how long a bearing can be expected to last when used with particular loads. Additionally, they often mention the effects of installing a bearing in an incorrect position or misalignment, which is helpful.
Timken: Engineering through an online bearings catalog, Timken is a treasure trove of information related to its bearing products, including technical specifications and information about their performance. Their site, too, has some tools to calculate the bearing’s life and rating, which I thought helped evaluate whether the bearings would meet the application requirements. Moreover, they assist the users with appropriate installation and maintenance procedures for a longer useful life.
Using these catalogs and manufacturer resources, I can then accurately determine the specifications and the uses of the double-row angular contact ball bearings, improving performance in my designs.
Technical Sheets and Documentation
To respond to the details about the double-row angular contact ball bearings, I regularly use the top three websites with the requisite technical parameters and documents.
SKF: Thanks to the SKF website, I can quickly get technical sheets showing other critical specifications such as:
- Dynamic Load Rating (C_(r)): This parameter determines the highest load a bearing can handle while in operation. I consider it very useful in predicting the bearing’s actual life.
- Static Load Rating (C_(0)): This parameter implies the unrotating bearing’s maximum load without a possibility of residual deformation. It is essential in case heavy loading is expected but in the static position.
- Limit Speeds: These ratings are provided by SKF so that I do not operate above the speed specified on the bearing unit and do not experience failure before time.
NSK: Also, on the NSK platform, do I find other important technical parameters such as:
- Operating Temperature Range: The range is beneficial because it helps in choosing an appropriate bearing, as the application may have some extreme temperatures that affect the materials.
- Lubrication Requirements: NSK presents the type and application days of bearing grease, which is very important for the normal functioning and durability of the bearings.
- Fatigue Life Charts: These charts assist in understanding the expected life with different load cases to improve performance.
Timken: In addition to that, Timken’s resources provide additional spikes such as:
- Bearing Dimensions: Calculating parameters such as inner and outer diameter and width is essential for proper fitting in structures.
- Maintenance Guidelines: Timken considers it necessary to have a maintenance and inspection program to enhance the bearings’ life.
- Installation Tips: Their documents often include instructions for common mistakes during installation, such as how to position and orient the part correctly.
Using the technical sheets and resources of said manufacturers, I am also able to defend my choice of double-row angular contact ball bearings regarding bearing performance and operating environment designs.
Consulting with Suppliers and Experts
I always need to consult suppliers and people within the industry to ask something specific or seek clarification relating to any particular bearing. Concerning the application and especially the bearing type, I can easily look for manufacturers like SKF, NSK, or Timken for guidance. I have their technical support or authorized dealers handle matters related to load usage, materials to be used, and fixes to be installed. Furthermore, some industry seminars or webinars allow me to get practitioners’ input on what works and does not work in the field. With these sources, I can make choices that will improve and extend the lifetime of my systems.
Frequently Asked Questions (FAQs)
Q: What is a Double Row Angular Contact Ball Bearing?
A: A double-row angular Contact Ball Bearing is a type of bearing that consists of two rows of balls that are arranged back to back with the help of cages. This is done because it provides more axial loads and higher capacity than a single-row angular contact ball bearing. These are designed for combined loads and have better stiffness.
Q: What are the major key specifications of Double Row Angular Contact Ball Bearings?
A: The major key specifications include overall bearing dimension, contact angle, bearing load capacity, and bearing material structure. The majority of double-row ball bearings are manufactured using carbon alloy steel and are fabricated in various sizes and models for different uses.
Q: What is the value of the contact angle in Double Row Angular Contact Ball Bearings?
A: The contact angle of a Double Row Angular Contact Ball Bearing is the angle between the line joining the points of contact of the balls and the raceway to the bearing axis and the line perpendicular to the bearing axis. Normal contact angles are about 30 – 40 degrees, which allows the axial loads to be higher due to the bearing structure.
Q: Which materials are typically used to fabricate the bearings in question?
A: The rings and balls of such bearings are often made of high-performance steel to withstand wear and tear for many years to come. The cages are usually made of steel, but depending on the application, brass or polymer is sometimes used.
Q: How can I choose the correct bearing size in my application?
A: For example, for NTNBearing Corporation, the bearing dimension table may be used to define the appropriate bearing size. Some considerations include the shaft diameter, housing bore, width, and load capacity.
Q: What advantages does a double-row angular contact ball bearing have over a single-row angular contact ball bearing?
A: Double-row Angular Contact Ball Bearings have more load capacity, higher stiffness, and can withstand axial load in both directions compared to single-row angular contact ball bearings. In cases where two single-row angular contact ball bearings are used, this bearing will take less space than these two single-row angular contact ball bearings.
Q: Is there a provision for Double Row Angular Contact Ball Bearings with seals or pogo shields?
A: Yes, Double Row Angular Contact Ball Bearings are available with seals or shields on both sides of the Outer Rings for protection against dust intrusion and moisture carry-away and for lubrication retention purposes. Hence, they are used in rugged and rigorous applications.
Q: Do Double Row Angular Contact Ball Bearings, including the various bearing types, possess the same or comparable load-carrying capacity?
A: The load-bearing capacity of double-row angular contact ball bearings is better than that of single-row angular contact ball bearings because of the two rows of balls present. They are, therefore, capable of taking more radial and axial loads and are consequently appreciable in challenging situations.
Q: Is there a place where information can be found on the models of Double Row Angular Contact Ball Bearings?
A: The manufacturer’s website provides comprehensive information on particular models. Other manufacturers, such as NTN Bearing Corp, provide detailed product catalogs and technical literature to assist in further selecting the correct bearing type.
Q: What should I notice when installing the Double Row Angular Contact Ball Bearings?
A: To begin with, if I may describe the process of installing Double Row Angular Contact Ball Bearings, it is clear that certain procedures, such as alignment, handling of the bearing, and integration of the right amount of preload, must be observed. For specific guidelines, please refer to the manufacturer’s installation instructions.
