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Ball Bearing

Ball Bearing

Your Professional Ball Bearing Manufacturer in China!

 

 

Our company was founded in 1986 and had been focusing on exporting high bearing ever since. We have a stock warehouse and provide a variety of stock bearings. For special and rare ones, we can distribute the goods to the agents in the country of origin of each brand, and the MOQ is as low as 1 set. We also have the ability to provide customers with professional bearing solutions. We work with professional bearing manufacturers and have invested over 300 million in upgrading product formulas.

 

 
Why Choose Us
 
01/

Rich Experience
There are nearly 40 years of bearing support and industrial service experience in our factory.

02/

Wide Market
Our products have been exported to North America, Europe, the Middle East, Brazil, South Africa, and Mexico and were well acknowledged by clients worldwide.

03/

Timely Delivery
Our warehouse is one of the largest product inventory warehouses. We can guarantee direct and timely delivery, and at the same time, we ensure that you get original sources of goods. If special bearings are not stocked, we can allocate cargo from the agents of original countries such as Sweden, Germany, the U.S.A., and Japan.

04/

Diverse Products
We have conventional various ball, roller, and needle bearings. And we can also provide some uncommon bearings such as non-standard bearings, linear bearings, automobile bearings, and giant bearings, as well as bearing tools such as bearing heaters, etc.

05/

Advanced Equipment
The production line of our factory is fully equipped, including manufacturing and testing machinery. We have an annual output of 5 million sets of bearings. We will check the production equipment regularly to ensure that we can produce higher-quality bearings.

06/

Global Shipping
Our products can be shipped from China to every corner of the world by sea, roadway and air. We ensure that every customer's order arrives on time.

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7602020-TVP Axial Angular Contact Ball Bearing

 

Introduction of Ball Bearing

A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races. The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. In most applications, one race is stationary, and the other is attached to the rotating assembly (e.g., a hub or shaft). As one of the bearing races rotates, it causes the balls to rotate as well. Because the balls are rolling, they have a much lower coefficient of friction than if two flat surfaces were sliding against each other.

 

Different Types of Ball Bearing
 
Deep-Groove Ball Bearing

This is the most widely used ball-bearing type in the world. It is because of its versatility and overall performance. They are characterized by having very deep raceway groves, where the outer and inner rings have arcs with a slightly larger radius than balls. They also have a non-separable ring in them. Furthermore, they are excellent for high radial load capacity and high speeds, and they can accept axial loads in both directions.

Angular Contact Ball Bearing

In this type of ball bearing, the direct line that connects the outer ring and inner ring balls have a given angle in the radial direction (Contact angle). This type of angle is generally designed with three different kinds of contact angles. These bearings can bear axial loads but must be used in pairs or in combination because the contact angle cannot be used singly.

Self-Aligning Ball Bearing

The self-aligning ball bearings include a double row of balls which are guided by a double row inner ring raceway and cage. They also contain the special features of a continuous spherical outer ring, allowing the inner ball/ring complement to swivel within the outer ring. This type of bearing is recommended when the alignment of the shaft and bearing is a problem that a shaft could deflect. Self-aligning roller bearings are more suitable for absorbing these radial forces.

Duplex Angular Contact Ball Bearing

These are bearings that pair two or more angular ball bearings in a tandem, back-to-back, or face-to-face arrangement. Bearings that are duplex face-to-face (DF) or back-to-back (DB) may support axial loads in both directions. In comparison to face-to-face duplex bearings, back-to-back duplex bearings may support more moment loads. Tandem duplex bearings are more axially load-bearing than single bearings in a single direction.

Four-Point Contact Ball Bearing

These bearings have a distinctive design where the inner ring is divided into two halves, resulting in four points of contact. It is between the balls and raceways under radial stresses, hence the term "four-point contact." As a result, these roller bearings can support axial loads traveling in both directions and a mix of radial and axial loads. Compared to angular contact bearings, these bearings are built to endure higher load capacities and more demanding environments. They work best with heavy weights that oscillate often.

 

Benefits of Using Ball Bearings
7602020-TVP Axial Angular Contact Ball Bearing
1228K Self-Aligning Ball Bearing
7602020-TVP Axial Angular Contact Ball Bearing
1228K Self-Aligning Ball Bearing

Precision
One of the best aspects of mechanics in general is unquestionably precision. Precision ball bearings, however, rank first among watchmakers, machine tool manufacturers, and aerospace manufacturers. Ball bearing manufacturers frequently use tolerances of less than one micron (one millimeter divided by 1,000, or 0.001 mm), demonstrating the high level of precision required and the necessity of keeping up with technological advancements to meet customer expectations.

 

Varieties
Ball bearings suppliers provides different types such as ball, roller, needle, ceramic, titanium, stainless steel, radial, axial, angular contact, twin ball races, to 4 points of contact bearings, etc. This subject is appealing and fascinating due to the enormous variety, particularly given the diverse bearing applications in the industry and the demand for innovations among end users.

 

Functionality
In actuality, the ball bearing allows for more than just circular motion. Additionally, it is the part that supports axial and radial stresses, including those from speed sensors, absorbs alignment mistakes in systems, or thermally and electrically isolates the parts to lower maintenance. So for thrust bearings include transferring thrust loads applied on the shaft and preventing the shaft from drifting in the axial direction. Typically, thrust ball bearing suppliers inform you or can guide you all about why you choose this type for your application.

 

Adaptability
Standard ball bearings come in a wide variety of varieties, however their unique requirements may not always be met by these dimensions. To address the most cutting-edge and outlandish requirements of many industries, including healthcare, building technology, automotive, and consumer products, small and medium-sized manufacturers of customized ball bearing solutions have emerged. Here, engineers can benefit from imagination, which frequently yields helpful solutions to problems. Ball bearing design is crucial, but some manufacturers go one step further by providing steel bearings with a plastic covering for even more performance options and component weight savings.

 

Economy
The ball bearing has significant economic value because it supports thousands of employment globally. The bearings also help to the green movement by offering yet less friction and hence less energy usage.

 

Operating considerations of Ball Bearing
 

Lifespan
The calculated life for a bearing is based on the load it carries and its operating speed. The industry standard usable bearing lifespan is inversely proportional to the bearing load cubed. The nominal maximum load of a bearing, is for a lifespan of 1 million rotations, which at 50 Hz (i.e., 3000 RPM) is a lifespan of 5.5 working hours. 90% of bearings of that type have at least that lifespan, and 50% of bearings have a lifespan at least 5 times as long.

 

Failure Modes
If a bearing is not rotating, maximum load is determined by force that causes plastic deformation of elements or raceways. The indentations caused by the elements can concentrate stresses and generate cracks at the components. Maximum load for not or very slowly rotating bearings is called "static" maximum load. Also if a bearing is not rotating, oscillating forces on the bearing can cause impact damage to the bearing race or the rolling elements, known as brinelling. A second lesser form called false brinelling occurs if the bearing only rotates across a short arc and pushes lubricant out away from the rolling elements.

 

Maximum Load
In general, maximum load on a ball bearing is proportional to the outer diameter of the bearing times the width of the bearing (where width is measured in the direction of axle). Bearings have static load ratings. These are based on not exceeding a certain amount of plastic deformation in the raceway. These ratings may be exceeded by a large amount for certain applications.

 

Lubrication
For a bearing to operate properly, it needs to be lubricated. In most cases the lubricant is based on an elastic hydrodynamic effect (by oil or grease) but working at extreme temperatures dry lubricated bearings are also available. For a bearing to have its nominal lifespan at its nominal maximum load, it must be lubricated with a lubricant (oil or grease) that has at least the minimum dynamic viscosity recommended for that bearing. The recommended dynamic viscosity is inversely proportional to diameter of bearing. If the viscosity of lubricant is higher than recommended, lifespan of the bearing increases, roughly proportional to the square root of viscosity. If the viscosity of the lubricant is lower than recommended, the lifespan of the bearing decreases, and by how much depends on which type of oil being used.

 

Direction of Load
Most bearings are meant for supporting loads perpendicular to the axle ("radial loads"). Whether they can also bear axial loads, and if so, how much, depends on the type of bearing. Thrust bearings are specifically designed for axial loads. For single-row edge-contact ball bearings, axial load can be about 2 times max radial load, and for cone-bearings maximum axial load is between 1 and 2 times maximum radial load.

 

Avoiding Undesirable Axial Load
The part of a bearing that rotates (either axle hole or outer circumference) must be fixed, while for a part that does not rotate this is not necessary (so it can be allowed to slide). If a bearing is loaded axially, both sides must be fixed. If an axle has two bearings, and temperature varies, the axle shrinks or expands, therefore it is not admissible for both bearings to be fixed on both their sides, since expansion of the axle would exert axial forces that would destroy these bearings. Therefore, at least one of the bearings must be able to slide.

 

Fit
Bearings can withstand their maximum load only if the mating parts are properly sized. Bearing manufacturers supply tolerances for the fit of the shaft and the housing so that this can be achieved. The material and hardness may also be specified. Fittings that are not allowed to slip are made to diameters that prevent slipping, and consequently the mating surfaces cannot be brought into position without force. For small bearings this is best done with a press because tapping with a hammer damages both bearing and shaft, while for large bearings the necessary forces are so great that there is no alternative to heating one part before fitting, so that thermal expansion allows a temporary sliding fit.

 

Avoiding Torsional Loads
If a shaft is supported by two bearings, and the center-lines of rotation of these bearings are not the same, then large forces are exerted on the bearing, which may destroy it. Some very small amount of misalignment is acceptable, and how much depends on the type of bearing. For bearings that are specifically made to be 'self-aligning', acceptable misalignment is between 1.5 and 3 degrees of arc. Bearings that are not designed to be self-aligning can accept misalignment of only 2–10 minutes of arc.

 

Comparison between needle bearings and ball bearings
 
Needle Bearings

Components:
Needle bearings consist of long, thin rollers that are cylindrical. These rollers are typically made of hardened steel or other durable materials.

 

Advantages:
Needle bearings have several advantages over other types of bearings. They have a low friction resistance, which results in low power consumption and high mechanical efficiency. Additionally, they are easy to start, which means they can be used in applications requiring frequent starting and stopping.

 

Disadvantages:
While needle bearings have many advantages, they also have disadvantages. One of the main disadvantages is that they are relatively expensive compared to other types of bearings. Additionally, they tend to produce more noise than different types of bearings.

 

Application:
Needle bearings are commonly used in various industrial and automotive applications, including compressors, transmissions, pumps, torque converters, and suspension systems. They are also used in applications where high speeds, high loads, and minimal space are required, such as in aircraft and aerospace applications. In summary, needle bearings are roller bearings that use small cylindrical rollers. They are well-suited for applications with high loads and limited space, such as in gear pumps, motors, compressors, and power transmission equipment.

Ball bearings

Components:
Ball bearings consist of long, thin rollers that are spherical. These rollers are typically made of hardened steel or other durable materials.

 

Advantages:
Ball bearings have several advantages over other types of bearings. They are relatively stable and have a small starting and running torque, which results in low power loss and high efficiency. Additionally, they can tolerate some misalignment of the inner and outer races.

 

Disadvantages:
While ball bearings have many advantages, they also have disadvantages. One of the main disadvantages is that they have a smaller load capacity for their size than other rolling-element bearings due to the smaller contact area between the balls and races.

 

Application:
Ball bearings are commonly used in various applications, from automobiles and appliances to industrial machinery and equipment. They are used in small power motors, automobile and tractor transmissions, machine tool gearboxes, general machinery, and tools. They can also be found in applications where high speeds, low friction, and minimal maintenance are required, such as in aircraft and aerospace applications. In summary, ball bearings are a rolling-element bearing that uses balls to maintain the separation between the bearing races. They are well-suited for applications where low friction and high-speed capability are required, such as in electric motors, pumps, gearboxes, and other rotating equipment.

 

 
Our Factory
 

 

Our factory offer standard the thin-section bearings, cross roller bearings, slewing bearing etc. With over 40 years of experience, we can design and manufacture various bearings with inner diameters ranging from 30mm to 6,000mm. Our precision grade can reach class P4 (ABEC7) or higher. We have bearings in stock or half-made rings ready for further production most of the time.

 

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Ultimate FAQ Guide to Ball Bearing
 
 

Q: How do I choose the right bearing?

A: One must, before selecting bearings, know or define the requirements profile of the application. Space, bearing arrangement, speed, loads, required stiffness, lubrication, etc. are parameters which must be considered. You can make your choices based on bearing data.

Q: Which ball bearings are better: ceramic or steel?

A: Ceramic Silicon Nitride (Si3N4) is used for making Ceramic bearings. Compared to traditional steel bearings, these are extremely light and hard. Steel bearings usually have per square inch hardness of around 30 million lbs. On the other hand, Ceramic bearings have a hardness of 47 million lbs per square inch. Ceramic bearings are lighter, as Silicon Nitride is less dense than the components that constitute steel. Also, due to their extra fine finish, Silicon Nitride is less prone to friction. As a result, these bearings produce less heat and require less lubrication.

Q: How fast can a ball bearing rotate?

A: There are several ball bearings that can rotate at a speed of half a million RPM. Such type of ball bearings is usually used in experimental or defense application. The rotating speed of a bearing and its speed always depends on its size, type and amount of lubrication that's been used, bearing materials and the cage, and other factors such as the period and the length of time for which maximum speed is needed.

Q: Do ball bearings have a temperature limit?

A: The temperature limit for bearings depends on the material of rings and balls, the retainer (cage), any closures such as rubber seals and finally, the lubricant. Chrome steel can support the same loads up to 120°C constant and 150°C intermittent. Above that, the load capacity drops noticeably. For 440 grade stainless steel, the figures are 250°C constant and 300°C intermittent. However, bearings can have a nylon or polyamide retainer which can limit the upper temperature to 100°C - 120°C depending on material. Bearing shields will cope with the same temperatures as the rings and balls, but rubber seals should not be used above 110°C. The next limiting factor can be the lubricant. Different oils and greases have different temperature ranges. As long as the other materials in a bearing are suitable, we can offer bearings with lubricants that will cope with -80°C all the way up to 300°C.

Q: What are ball bearings made of?

A: Most ball bearings are made of a type of steel known as high carbon chromium steel, often called chrome steel. This is used for reasons of cost and durability. Bearings are also made from other materials such as stainless steel, ceramics and plastic. Chrome steel will corrode if exposed to moisture so, where corrosion resistance is needed, bearings made from 440 grade stainless steel are often used. This is a very hard, magnetic steel with good corrosion resistance, but not suitable for use with salt water and many chemicals.

Q: How to clean & Lubricant Ball Bearings

A: Soak the ball bearings with volatile degreased and apply motor spray on them.
Shake the bearing case vigorously to remove dirt. It will loosen and remove the dirt trapped inside the bearings.
Soak the bearings for another 15-30 minute. Repeat the process until the oil/liquid is clean. Dry the ball bearing with hot air gun/ hair blower to prevent rusting of the bearing.
Apply light oil on the bearings, give it about 20 minutes to penetrate the seals and then clean the outsides up.

Q: How to Avoid Bearing Corrosion?

A: It is crucial that you should not expose bearings to the presence of water for a long time, as it will lead to rust and corrosion. It will also cause the premature failure of the bearings, which can affect the machine performance and productivity. As a result, it will increase your operating costs. Also, make sure to wear gloves when handling bearings. Perspiration can also lead to rust and corrosion.

Q: What types of lubricants are used in ball bearings?

A: Grease, oil, and synthetic oils are used primarily, though dry lubricants like graphite are also employed. Additionally, solid oil technology has recently emerged as a competitive alternative.

Q: How long will a ball bearing last before it needs to be serviced or replaced?

A: While environmental factors can affect the service life, a properly selected bearing will provide working hours consistent with the work hours formula discussed in the Selection criteria.

Q: Will ball bearings reduce friction?

A: Yes, ball bearings are specifically designed to reduce friction. These bearings contain balls which have less surface contact and produce less friction than a flat surface would. The inner ring and outer ring have rolling friction instead of sliding friction. Therefore, ball bearings are able to spin smoothly. Due to the point contact of the balls to the raceway, these bearings can take relatively low loads, but at higher speeds than roller bearings. Conversely, roller bearings take higher loads but at slower speeds.

We're well-known as one of the leading ball bearing manufacturers and suppliers in China. If you're going to buy high quality ball bearing with competitive price, welcome to get more information from our factory.

CRBH2008, Ball Screw Bearing, P4 Precision Angular Bearing

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