Your Professional Precision 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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B7006-C-T-P4S-UL Spindle Bearing
*B7006-C-T-P4S-UL Bearing . *Dimensions: 25x47x12 mm . *Weight: 0.07676 Kg . *If you wants to know Add to Inquiry -
B7004-C-T-P4S-UL Spindle Bearing
*B7004-C-T-P4S-UL Bearing . *Dimensions: 20x42x12 mm . *Weight: 0.07 Kg . *If you wants to know Add to Inquiry -
B7003-C-T-P4S-UL Spindle Bearing
*B7003-C-T-P4S-UL Bearing . *Dimensions: 17x35x10 mm . *Weight: 0.04 Kg . *If you wants to know Add to Inquiry -
B7001-C-T-P4S-UL Spindle Bearing
*B7001-C-T-P4S-UL Bearing . *Dimensions: 12x28x8 mm . *Weight: 0.02 Kg . *If you wants to know more Add to Inquiry -
B7048-C-T-P4S-UL Spindle Bearing
*B7048-C-T-P4S-UL Bearing . *Dimensions: 220x340x56 mm . *Weight: 15.53 Kg . *If you wants to know Add to Inquiry -
B7044-C-T-P4S-UL Spindle Bearing
*B7044-C-T-P4S-DL Bearing . *Dimensions: 220x340x56 mm . *Weight: 15.53 Kg . *If you wants to know Add to Inquiry -
B7040-C-T-P4S-UL Spindle Bearing
*B7040-C-T-P4S-DL Bearing . *Dimensions: 190x310x51 mm . *Weight: 11.6 Kg . *If you wants to know Add to Inquiry -
B7038-C-T-P4S-UL Spindle Bearing
*B7038-C-T-P4S-DL Bearing . *Dimensions: 190x290x46 mm . *Weight: 11.458 Kg . *If you wants to know Add to Inquiry -
B7020-C-T-P4S-DL Spindle Bearing
*B7020-C-T-P4S-DL Bearing . *Dimensions: 100x150x24 mm . *Weight: 1.24 Kg . *If you wants to know Add to Inquiry -
Insulated Bearing
Insulated bearings refer to bearings that have an electrical insulating coating - an aluminum oxide Add to Inquiry -
BSD 4072 CGA Super-precision Bearing
*BSD 4072 CGA Bearing . *Dimensions: 40x72x15 mm . *Weight: 0.254 kg. *If you wants to know more Add to Inquiry -
BSA 208 CGB Super-precision Bearing
*BSA 208 CGB Bearing . *Dimensions: 40x80x18 mm . *Weight: 0.419 kg. *If you wants to know more BSA Add to Inquiry
Introduction of Precision Bearing
Precision bearings are designed to meet demanding needs of special applications that incorporate high accuracy, high rigidity, and high speeds. These bearings minimize heat generation, noise, and vibration. The optimal materials and internal design give these bearings the highest level of accuracy. To ensure all benefits of precision bearings, it is vital that shafts and housings are correctly and precisely mated. These bearings are often used in metal cutting and woodworking machinery spindles, vacuum pumps, precision ball screws, printing machinery, medical devices, aerospace, high speed rolling mills, and high speed turbochargers.
Benefits of Precision Bearing
Contact Fatigue Strength
Under the circle load, the contact parts are easy to be broken. To improve the service life of the precision bearing, the precision bearing must have high fatigue strength.
Abrasive Resistance
When the precision bearing is working, there are both rolling friction and sliding friction between ring, roller and cage, so the bearings will wear all the time. To maintain the precision bearing precision and stability and prolong the service life, the precision bearing must have good abrasive resistance performance.
Hardness
Harness is the main quality of precision bearing material, which has indirect effects on contact fatigue strength, abrasive resistance, and flexibility. In running condition, the precision bearing hardness should reach HRC61~65, which can make the precision bearing have better performance on contact fatigue strength, abrasive resistance.
Anti-Corrosion
To avoid the corrosion during processing, storage and delivery, precision bearing material mush have good performance of anti-corrosion.
Process Performance
Precision bearing parts are going through many cold/heat process during production. To ensure the precision bearings are in good quality, the precision bearing material must have good process performance, for example, cold/hot process ability, machining ability, harden ability etc.
Types of Bearings
Angular Contact Ball Bearings
These types of bearings have raceways of both inner and outer rings that are displaced relative to one another in the bearing axis direction. This means that these types of bearings are designed in such a way that they can accommodate combined loads (simultaneously acting axial and radial loads). These types of bearings are available in different design styles, with shielding or seals.
Deep Groove Ball Bearing
These types of bearings are the most commonly used types of ball bearings. They are available in the shield, seal, and snap-ring arrangements. The dimensions of the race within these kinds of bearings closely match the dimensions of the contained ball. They also have the ability to support heavy loads. Deep groove bearings offer both axial and radial support.
Miniature Bearings
These are small bearings having balls as their rolling element. Miniature bearings are sometimes referred to as micro bearings or instrument bearings with inner and outer rings, snap rings, balls, and retainers. These types of bearings are utilized in industrial and medical handpieces and other precision applications. Ball bearing designs include angular, radial, thrust, and pivot.
Duplex Ball Bearing
These types of ball bearings are formed by a combination of two angular contact bearings. The combinations that are possible include back-to-back (type DB), face-to-face (type DF) with the faces of the outer ring together, or both front faces being in the same direction (type DT). DB and DF duplex bearings are able to take axial and radial loads in either direction. When an axial load is strong, and in one direction and the imposition of the load equally on each bearing is necessary, type DT is used.
Five Warning Signs That You Should Replace Your Precision Bearings
Lubrication
With 36% of bearing failures attributed to issues with lubrication, it's well known that using the wrong type or quantity of lubricant can lead to bearing failure. Contamination can also occur during lubrication when foreign particles become stuck to the end of the grease gun, entering the bearing. If you become aware that the wrong type of grease has been applied to a bearing, it's likely that failure may have already occurred. Similarly, if the bearing has been running dry due to lack of lubrication or grease has leaked through the seal due to over-lubrication, it's likely that the damage has already been done. Adding grease to a bearing which is suffering from issues due to lubrication problems may seem like a good fix. In fact, it's only masking the issue. You'll need to determine the severity of the problem using data such as temperature and vibration and replace the bearing before it leads to catastrophic failure.
Contamination
A further 14% of bearing failures are caused by contamination. It could be that high-pressured wash downs have emulsified the grease, rendering it ineffective. This leads to metal-to-metal contact within the bearing, generating heat and friction. Inefficient seals can also lead to particle contamination, spoiling the grease. This particle contamination may also be abrasive, causing damage to the surface of the bearing raceways. If you are aware that contamination has occurred within your bearing, it's wise to replace the bearing as soon as possible. The chances are, failure has already occurred, and it's only a matter of time before this leads to further issues within your machinery.
Vibration
A sure sign that your bearing has failed is vibration. If the raceway surface of the bearing becomes damaged by abrasion, the rolling elements (the balls or rollers) will bounce around on the raceway surface during operation, causing high levels of vibration. If you notice your bearing suddenly vibrating during operation, it's time to replace it. If not, you could find that catastrophic failure is not far away, causing you excessive downtime and high costs.
Excessive Noise
If your bearing is suddenly noisy during operation, you're looking at a bearing failure. This excess noise is created when the raceways of the bearing have become damaged, causing the rolling elements to bounce or rattle during rotation. If you notice your bearing making excessive noise while it's running, you'll need to replace it as soon as possible. The failure has already occurred within the bearing and machine breakdown could happen at any moment.
Increased Operating Temperature
When the rolling elements of a bearing run on damaged on un-lubricated raceways, this will result in excessive friction. This friction generates energy which causes the temperature of the bearing to elevate. The more significant the damage, the higher the temperature will become due to the levels of friction present. Regularly checking the temperature of your bearings can alert you to a bearing failure which needs to be dealt with as soon as possible.
It's important not to just replace a bearing, but to look for the root cause of the failure. Performing effective root because analysis can allow you to put mitigating measures in place to avoid future bearings meeting the same fate, further downtime and additional costs to your business. Condition monitoring systems are a great way to continuously monitor the health of your machinery during operation, alerting you to potential issues. This can give you time to remedy the problem, preventing failure from occurring.
What Should be Considered When You choose a Precision bearing?
Load Capacity
Each type of bearing is specifically designed to support an axial or radial load. Some bearings can support both loads: in this case, we refer to a combined load. If you have to support a combined load, for example, we recommend that you choose a tapered roller bearing. If you need a bearing capable of withstanding a high radial load, then we recommend a cylindrical roller bearing. On the other hand, if your bearing needs to support lighter loads a ball bearing might be sufficient as they are often less expensive.
Rotation Speed
Rotation speed is another element that should be considered. Some bearings can withstand high speeds. The presence of a cage for cylindrical roller bearings and needle bearings allows for greater speeds than bearings without a cage. However, the choice of a higher speed is sometimes made at the expense of the load. You should also consider the possible presence of misalignment; some bearings are not suitable for this situation, such as double row ball bearings.
Bearing Construction
You will therefore need to pay attention to the bearing construction: insert and spherical bearings make it easy to support this misalignment. We suggest that you lean towards bearings with automatic alignment, which automatically correct alignment defects caused by shaft bending or installation errors. Similarly, operating conditions are very important when choosing the ideal bearing. It is thus necessary to analyze the environment you will be using the bearing in. Your bearing may be subject to a good deal of contamination. Some uses can lead to noise disturbance, impact and/or vibration. Your bearing must therefore withstand this impact on the one hand and not be an inconvenience on the other.
Sealing System
Choosing a sealing system is essential in order to ensure the correct and long-lasting operation of a bearing; it is therefore important to ensure that the bearing is always well-protected from any impurities and external agents, such as dust, water, corrosive fluids or even used lubricants. This choice depends on the type of lubricant, the ambient conditions (and therefore the type of contamination), the fluid pressure and the rotation speed. To give you a good place to start, the fluid pressure is a determining factor in the choice of sealing system. If the pressure is high (in the range of 2–3 bars for example) a mechanical seal is ideal. Otherwise, the choice will be directly linked to the type of lubricant, grease or oil. For example, for grease lubrication the most commonly used solutions are: deflectors or washers, narrow passages that are machined or with grooves; in the case of oil lubrication the sealing system is often accompanied by the presence of a groove for oil recovery.
Conditions of Use
Conditions of use can also influence your choice, especially when it comes to assembling the bearing. The rigidity and precision that you use requires must also be taken into account. In some cases, you can provide for the application of a preload in the assembly of your bearing to increase its rigidity. Additionally, the preload will have a positive impact on the bearing life and noise level of your system.
Materials
Be careful, in order to choose the preload (radial or axial) you must know the rigidity of all parts through software or experimentation. In your selection criteria, you must also consider the ideal material for your bearing. Bearings can be made out of metal, plastic or ceramic. The bearing material depends on its intended use. We recommend that you choose the most compression-resistant bearing. Keep in mind however that the material used affects the price of the bearing.
Ten Tips for Proper Precision Bearing Maintenance
Handle and Store Correctly
To avoid contaminants including moisture, dust or dirt entering the bearing, they should be handled and stored correctly. Firstly, bearings should be stored horizontally in their original packaging in a clean, dry and room temperature environment. When bearings are unnecessarily handled, for example, if their wrappings are prematurely removed, this can expose them to corrosion or contaminants. Bearings are delicate components and should be treated with care. As such, components that have been dropped shouldn't be used as this could lead to premature failure.
Use Specialist Tools
Additionally, appropriate equipment should be used when handling bearings. Tools that are not specialized for use during the bearing mounting and dismounting process can cause unnecessary damage, denting and wear. Bearing pullers or induction heaters, for example, are designed specifically for bearings.
Check the Bearing Housing and Shaft
Inspect the physical condition of the housing and shaft prior to mounting the bearing. Use a soft cloth to wipe the surfaces clean, before familiarizing yourself with the correct mounting method.
Mount Correctly
You should use the correct method when mounting your bearings, and this varies depending on the type of bearing and type of fit. Radial ball bearing rings can be mounted with a variety of fits from sliding fits to tight press fits, depending on the type of load, the speed and vibration levels. Applying pressure to the wrong ring when fitting can result in damage to the rolling elements. Equally, excessively loose or excessively tight fits, a poor finish on the bearing seats or out of round shafts or housings should also be avoided.
Get Your Lubrication Right
One of the leading causes of bearing failure is lubrication failure. This encompasses using the incorrect lubricant, as well as using too much or too little lubrication. The correct lubricant is chosen by considering the environmental conditions, temperature, speed and load. A bearing specialist will be able to advise on a suitable lubrication match and can control bearing lubrication to within a few milligrams. So, if you require a low, normal or high grease fill, you'll be safe in the knowledge that your lubrication won't cause problems later down the line. Another way to ensure you're getting your lubrication right is to invest in an automatic lubrication system. This system delivers the correct amount of lubrication and the right time, making sure your equipment is properly lubricated at all times.
Avoid Temperatures Outside the Bearing's Range
If a steel bearing is heated above the limit that it is designed for, this can permanently deform or soften the bearing material, resulting in a reduced load carrying capacity and leading to equipment failure. Choosing a bearing that is suitable for your temperature operating range is the first step. During regular maintenance, look out for discoloration of the rings, rolling elements and cages, as this could indicate overheating. This can be the result of excessive operating temperatures and improper lubrication and requires your attention quickly.
Where Possible, Prevent Corrosion
Corrosion is the natural enemy of bearings. Over time, if bearings are exposed to moisture, corrosion will occur. This can lead to rust entering the raceway and, ultimately, premature bearing and equipment failure. Wearing gloves will ensure that perspiration or other liquids do not enter the bearing. When designing specifically for corrosive environments, selecting the right bearing is key. For example, opting for a 316 stainless steel bearing with seals is often a good choice in marine or chemical environments.
Choose Your Replacement Carefully
If a bearing does reach the end of its operating life, replace your bearing with one that is identical or superior in quality to the original. A low-quality alternative will be more likely to fail and could lead to more costly equipment failure in the long run.
Monitoring
It's rare that a bearing will fail without any warning signs. Excessive noise or an increase in vibration or temperature could be the symptom of a deeper problem. If a bearing exhibits any operational abnormalities, it should be monitored more closely. Another great way to monitor bearing health is with an automatic lubrication system. This system can accurately monitor your important components and ensures that they are being properly lubricated at all times.
Call In The Experts
Finally, if in doubt, seek the help of an expert. A bearing specialist will be able to advise you on the best maintenance method for your specific application and will be able to help you diagnose any bearing problems. It can be as simple as sending your problem bearings to experts, who will inspect and lubricate your bearings if required.
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.
Ultimate FAQ Guide to Precision bearing
Q: What is the best way to lubricate bearings?
A: Choose the appropriate lubricant for the specific bearing type and application. Apply a small amount of lubricant evenly to the bearing surfaces. Ensure the bearing is properly reassembled, and excess lubricant is wiped off. Monitor regularly and reapply lubricant as needed for optimal performance.
Q: What are the first signs of bearing failure?
A: If your bearing is suddenly noisy during operation, you're looking at a bearing failure. This excess noise is created when the raceways of the bearing have become damaged, causing the rolling elements to bounce or rattle during rotation.
Q: What is the difference between precision bearings and standard bearings?
A: Precision bearings have a higher than standard precision level. Precision ball bearings conform to ABEC-1 and ABEC-3 tolerances to meet demanding application requirements, while high precision ball bearings must adhere to ABEC-5, ABEC-7, or ABEC-9 tolerances.
Q: How are bearings greased?
A: It is far better to introduce new grease in the center of the bearing and let it push the old grease out each side. If this is not possible in the selected bearing, then the grease needs to be applied to one side of the bearing while the other side of the housing cavity provides someplace for the old grease to go.
Q: What is bearing tolerance?
A: ISO bearing tolerances start at P0 and then move upwards to precision grades P6, P5 and then P4. ISO tolerances are measured in thousandths of a millimeter (or microns). AFBMA (ABEC) bearing tolerances are often measured in ten-thousandths of an inch with grades Abec1, Abec3, Abec5 and Abec7.
Q: What are the limitations of bearings?
A: One of the major disadvantages of full complement bearings is that they have limited speed capabilities. Without a cage or separator to guide the rolling elements, they can become misaligned, leading to reduced speed and premature failure.
Q: How do you measure bearing thickness?
A: In the absence of a caliper, a good quality steel ruler will suffice. To measure the outside diameter of a bearing place the jaws of the caliper around the bearing and close it until it's a good fit but not tight, now read the value from the caliper.
Q: How do you check bearing vibration?
A: A common approach is to mount the bearing on a quiet running spindle and measure the radial velocity at a point on the bearing's outer ring in three frequency bands, 50-300, 300-1800 and 1800-10000Hz. The bearing must meet RMS velocity limits in all three frequency bands.
Q: How do you reduce bearing vibration?
A: Ensuring proper assembly and tightening of components, as well as minimizing any excessive clearances, can help reduce mechanical looseness-induced vibrations.
Q: How do you fix noisy bearings?
A: Unfortunately, you can't: the only solution to a worn, noisy wheel bearing is to have it replaced by a garage; bearings are not repairable.
We're well-known as one of the leading precision bearing manufacturers and suppliers in China. If you're going to buy high quality precision bearing with competitive price, welcome to get more information from our factory.
Ultrahigh Speed Angular Contact Ball Bearings, 130 25 500, QN 355 20A