Product Description
PRODUCT PICTURES
OUR SERVICES
We can provide manufacturing capabilities and services of regular bearings for you, or customized non-standard bearings as you required.
BEARING:
— Dimensions
— Material
— Tolerance standard
APPEARANCE:
— Logo (Laser Marking)
— Package Design
40+ YEARS EXPERIENCE
CONTINUOUS AND STABLE DELIVERY OF PRODUCTS.
With over 40 years experience of the bearing manufacturing, we know how to make good bearings with less cost consistently and efficiently.
We use advanced CNC turning, grinding, and superfinishing machines to ensure high, stable, and accurate machining. All of your goods, from the most economical category, to the highest rated category, will always be manufactured precisely to the standards you require.
OWN HEAT TREATMENT
CONTROALLABLE COST AND QUALITY.
Heat treatment is 1 of the crucial processes to ensure high performance of bearing materials. Compared with other manufacturers, we can produce higher quality bearings at smaller cost, with a more flexible and controllable production schedule, and in a shorter time.
We have 6 heat treatment production lines.
Bearings are heated uniformly, with small deformation and little/no oxidized decarburization, which can make them have high hardness, high fatigue resistance, good wear resistance, dimensional stability, and excellent mechanical strength.
OUTSTXIHU (WEST LAKE) DIS. QUALITY
LOW NOISE, LOW FRICTION AND LONG LIFE.
All our products are characterized by low noise, low friction and long life. This is due to our attention to the roundness, waviness and surface roughness of bearing raceway.
Our products fully meets the requirements of national and international standards accorind to the testing result of
roughness, roundness, hardness, vibration noise, vibration velocity.
PACKING
PACKAGING THAT HELPS SELL.
1, Inner package
Corrosion and Dust Proof PE plastic film / bag packing + Tube packing, or Wrapping tape for larger bearings.
2, Corrugated Individual Box
Our attractive sales-helpful “3-JOYS” package, or as the design of your package.
3, Outer package
Corrugated carton + Wooden pallet
MODERN WELL-ORGANIZED WAREHOUSE
· Constant temperature (20°C) and humidity (RH 52%) warehouse
· Hundreds of models on hand, short delivery time.
HONOR & SYSTEM CERTIFICATES
EXHIBITION
SAMPLES POLICY
FREE SAMPLES AND SHIPPING
We are happy to send you free samples of our bearings for field testing. All transportation costs will be paid by us.
Please note: Depending on the model and value of samples, this policy may not apply!
Please contact our sales staff for details.
TRANSPORTATION
FASTEST DELIVERY TO CUSTOMERS
CUSTOMERS FEEDBACK
PAYMENT TERMS
To facilitate your payment, we offer a variety of options!
FAQ
1, About the lead time.
This depends on several factors, like Is the production schedule tight? Is there a corresponding model in stock, and is there enough of this model in stock? How many pcs of that model would be ordered?
Simply speaking, based on a 20′ GP container load:
| If the model your Preferred is | Sufficient stock | Lead Time |
| Regular models | YES | Within 7 days |
| Regular models | NO | Within 30 days |
| Non-regular model | NO | About 50 days |
For accurate estimate, please contact with our sale stuff. Thanks.
2, Minimum order quantity.
Even just ONE piece of bearing is ok for us.
3, If you don’t know which model is the right choice…
We would like to give you some advise if you like, according to the real situation and demand of your local market. Our purpose is to help you to get proper and right models for your customers, so that you would make a better sales and income finally.
4, Factory Inspection
We surely would welcome you or your representatives to come to our plants or working offices to take a good look and chat with our hardworking CZPT employees. Ask our sales stuff and she/he will arrange that for you.
OPTIONS OF SPECIFICATION AND STHangZhouRD
| Subject | Symbol | Description |
| Sealing & Sealing type | Z | Metal shield on 1 side. |
| ZZ | Metal shields on both sides. | |
| RS | Rubber seal on 1 side. | |
| 2RS | Rubber seals on both sides. | |
| ZNR | Shield on 1 side, snap ring groove in the outer ring, with snap ring on the opposite side of the shield | |
| 2ZNR | Shield on both sides, snap ring groove in the outer ring, with snap ring | |
| ZNBR | Shield on 1 side, snap ring groove in the outer ring, with snap ring on the same side as the shield | |
| Cage Materials | J | Pressed steel cages |
| M | Solid brass cage | |
| F | Solid cage made from steel or iron | |
| Y | Pressed brass cages. | |
| T | Laminated phenolic cages. | |
| TN | Polyamide cages | |
| TH | Glass-fiber reinforced phenolic resin cages. | |
| TV | Polyamide cage | |
| Cage Designs | P | Window-type cage |
| H | Claw-type cage | |
| A | Cage guided on the bearing outer ring | |
| B | Cage-guided on the bearing inner ring | |
| S | Cage with lubricating slots in the guiding surfaces | |
| D | Carbonitriding cage | |
| W | Welded cage | |
| R | Riveted Cage | |
| Cage Types | N/A | Claw-type cage |
| Ribbon cage | ||
| Crown cage | ||
| Sunflower cage | ||
| Tapered cage | ||
| Tolerances | PN(P0) | Bearings in standard tolerance |
| P6 | Tighter tolerance than standard bearings | |
| P5 | Tolerance tighter than P6 | |
| P4 | Tolerance tighter than P5 | |
| P2 | Tolerance tighter than P4 | |
| Contact Angle | C | Contact angle 15˚. |
| AC | Contact angle 25˚. | |
| CA | Contact angle 20˚. | |
| E | Contact angle 35˚. | |
| B | Contact angle 40˚. | |
| Bearing Sets | DB | Two bearings: back-to-back. |
| DF | Two bearings: face-to-face. | |
| DT | Two bearings: in tandem. | |
| TBT | Three bearings: tandem and back-to-back. | |
| TFT | Three bearings: tandem and face-to-face. | |
| QFC | Four bearings: tandem and face-to-face. | |
| DB | Two bearings: back-to-back. | |
| DF | Two bearings: face-to-face. |
PRODUCT PARAMETERS
This tech sheet may not contain all or every piece of information you want to know. Please contact our sales staff to obtain or compare the information.
| Designation | Boundary Dimension (mm) | Limiting Speed (rpm) | Load Rating (Kn) | Weight | ||||
| Designation | Inner Diameter (d) |
Outside Diameter (D) |
Width (B) |
Grease Lubrication | Oil Lubrication | Dynamic Load (cr) |
Static Load (cor) |
Weight (kg) |
| 7200C | 10 | 30 | 9 | 18000 | 26000 | 5.81 | 2.93 | 0.032 |
| 7200AC | 10 | 30 | 9 | 18000 | 26000 | 5.5 | 2.85 | 0.032 |
| 7200B | 10 | 30 | 9 | 16000 | 25000 | 5.3 | 2.7 | 0.032 |
| 7201C | 12 | 32 | 10 | 17000 | 24000 | 7.3 | 3.4 | 0.039 |
| 7201AC | 12 | 32 | 10 | 17000 | 24000 | 7.09 | 3.3 | 0.039 |
| 7201B | 12 | 32 | 10 | 15000 | 23000 | 6.9 | 3.2 | 0.039 |
| 7202C | 15 | 35 | 11 | 16000 | 22000 | 8.6 | 4.5 | 0.048 |
| 7202AC | 15 | 35 | 11 | 16000 | 22000 | 8.3 | 4.3 | 0.048 |
| 7202B | 15 | 35 | 11 | 15000 | 21000 | 7.9 | 4.2 | 0.048 |
| 7203C | 17 | 40 | 12 | 15000 | 20000 | 10.8 | 6.1 | 0.069 |
| 7203AC | 17 | 40 | 12 | 15000 | 20000 | 10.5 | 5.6 | 0.069 |
| 7203B | 17 | 40 | 12 | 14000 | 19000 | 9.9 | 5.5 | 0.069 |
| 7204C | 20 | 47 | 14 | 13000 | 18000 | 15.5 | 8.9 | 0.110 |
| 7204AC | 20 | 47 | 14 | 13000 | 18000 | 15 | 8.5 | 0.110 |
| 7204B | 20 | 47 | 14 | 12000 | 16000 | 13.4 | 7.6 | 0.110 |
| 7205C | 25 | 52 | 15 | 11000 | 16000 | 16.5 | 10 | 0.130 |
| 7205AC | 25 | 52 | 15 | 11000 | 16000 | 15.8 | 9.7 | 0.130 |
| 7205B | 25 | 52 | 15 | 10000 | 14000 | 14.8 | 9.3 | 0.130 |
| 7206C | 30 | 62 | 16 | 9000 | 13000 | 23 | 14.7 | 0.217 |
| 7206AC | 30 | 62 | 16 | 9000 | 13000 | 22.1 | 13.5 | 0.217 |
| 7206B | 30 | 62 | 16 | 8500 | 12000 | 20.5 | 13.5 | 0.217 |
| 7207C | 35 | 72 | 17 | 8000 | 11000 | 30.3 | 20 | 0.313 |
| 7207AC | 35 | 72 | 17 | 8000 | 11000 | 29.2 | 18 | 0.313 |
| 7207B | 35 | 72 | 17 | 7500 | 10000 | 28.3 | 14.8 | 0.313 |
| 7208C | 40 | 80 | 18 | 7500 | 10000 | 38.4 | 26.3 | 0.402 |
| 7208AC | 40 | 80 | 18 | 7500 | 10000 | 36.8 | 25.4 | 0.402 |
| 7208B | 40 | 80 | 18 | 6700 | 9000 | 34.5 | 23.8 | 0.402 |
| 7209C | 45 | 85 | 19 | 6700 | 9000 | 40.4 | 29.3 | 0.460 |
| 7209AC | 45 | 85 | 19 | 6700 | 9000 | 38.6 | 28.1 | 0.460 |
| 7209B | 45 | 85 | 19 | 6300 | 8500 | 34 | 24.6 | 0.460 |
| 7210C | 50 | 90 | 20 | 6300 | 8500 | 42.8 | 31.3 | 0.510 |
| 7210AC | 50 | 90 | 20 | 6300 | 8500 | 40.8 | 30.1 | 0.510 |
| 7210B | 50 | 90 | 20 | 5600 | 8000 | 40.4 | 25.6 | 0.510 |
| 7211C | 55 | 100 | 21 | 5600 | 7000 | 53.2 | 39.9 | 0.680 |
| 7211AC | 55 | 100 | 21 | 5600 | 7000 | 50.8 | 38.2 | 0.680 |
| 7211B | 55 | 100 | 21 | 5300 | 7000 | 46.3 | 36 | 0.680 |
| 7212C | 60 | 110 | 22 | 5300 | 7000 | 61 | 48.2 | 1.571 |
| 7212AC | 60 | 110 | 22 | 5300 | 7000 | 58.1 | 46 | 1.571 |
| 7212B | 60 | 110 | 22 | 4800 | 6300 | 56.1 | 44.3 | 1.571 |
| 7213C | 65 | 120 | 23 | 4800 | 6300 | 69.8 | 54.4 | 1.090 |
| 7213AC | 65 | 120 | 23 | 4800 | 6300 | 66.6 | 52.1 | 1.090 |
| 7213B | 65 | 120 | 23 | 4300 | 6000 | 65.7 | 50.2 | 1.090 |
| 7214C | 70 | 125 | 24 | 4500 | 5800 | 72.8 | 59.7 | 1.180 |
| 7214AC | 70 | 125 | 24 | 4500 | 5800 | 69.4 | 57 | 1.180 |
| 7214B | 70 | 125 | 24 | 4000 | 5600 | 70.4 | 56.3 | 1.180 |
| 7215C | 75 | 130 | 25 | 4300 | 5600 | 79.2 | 65.6 | 1.320 |
| 7215AC | 75 | 130 | 25 | 4300 | 5600 | 75.3 | 62.8 | 1.320 |
| 7215B | 75 | 130 | 25 | 3800 | 5300 | 68.6 | 58.2 | 1.320 |
| 7216C | 80 | 140 | 26 | 4000 | 5300 | 92.5 | 66.2 | 1.570 |
| 7216AC | 80 | 140 | 26 | 4000 | 5300 | 91.3 | 65.1 | 1.570 |
| 7216B | 80 | 140 | 26 | 4000 | 5300 | 78.7 | 65.7 | 1.570 |
| 7217C | 85 | 150 | 28 | 3800 | 5000 | 99.7 | 84.6 | 2.571 |
| 7217AC | 85 | 150 | 28 | 3800 | 5000 | 94.9 | 80.8 | 2.571 |
| 7217B | 85 | 150 | 28 | 3600 | 4800 | 83.2 | 74.1 | 2.571 |
| 7218C | 90 | 160 | 30 | 3600 | 4800 | 128 | 111.7 | 2.470 |
| 7218AC | 90 | 160 | 30 | 3600 | 4800 | 122 | 106.5 | 2.470 |
| 7218B | 90 | 160 | 30 | 3200 | 4300 | 107.6 | 92.4 | 2.470 |
| 7219C | 95 | 170 | 32 | 3400 | 4500 | 134.6 | 112.2 | 3.571 |
| 7219AC | 95 | 170 | 32 | 3400 | 4500 | 128.4 | 107.8 | 3.571 |
| 7219B | 95 | 170 | 32 | 3000 | 4000 | 121.4 | 106.7 | 3.571 |
| 7220C | 100 | 180 | 34 | 3200 | 4300 | 148 | 125 | 3.620 |
| 7220AC | 100 | 180 | 34 | 3200 | 4300 | 142 | 120.6 | 3.620 |
| 7220B | 100 | 180 | 34 | 2800 | 3800 | 140 | 102.5 | 3.620 |
| 7221C | 105 | 190 | 36 | 3000 | 4000 | 166.6 | 138.6 | 4.290 |
| 7221AC | 105 | 190 | 36 | 3000 | 4000 | 159 | 135.1 | 4.290 |
| 7221B | 105 | 190 | 36 | 2800 | 3800 | 143.3 | 128.5 | 4.290 |
| 7222C | 110 | 200 | 38 | 2800 | 3800 | 184.7 | 154.8 | 5.030 |
| 7222AC | 110 | 200 | 38 | 2800 | 3800 | 176.3 | 151.2 | 5.030 |
| 7222B | 110 | 200 | 38 | 2400 | 3400 | 153.8 | 144.3 | 5.030 |
| 7224C | 120 | 215 | 40 | 2400 | 3400 | 203.1 | 178.4 | 7.080 |
| 7224AC | 120 | 215 | 40 | 2400 | 3400 | 193.6 | 170.9 | 7.080 |
| 7224B | 120 | 215 | 40 | 2200 | 3200 | 165.4 | 161.4 | 7.080 |
| 7226C | 130 | 230 | 40 | 2000 | 3000 | 206.6 | 209.2 | 8.100 |
| 7226AC | 130 | 230 | 40 | 2000 | 3000 | 196.4 | 200.1 | 8.100 |
| 7226B | 130 | 230 | 40 | 1800 | 2800 | 170.8 | 174.2 | 8.100 |
| 7228C | 140 | 250 | 42 | 2000 | 2800 | 227.2 | 238.3 | 9.950 |
| 7228AC | 140 | 250 | 42 | 2000 | 2800 | 216.9 | 227.4 | 9.950 |
| 7228B | 140 | 250 | 42 | 1800 | 2600 | 212.2 | 197.3 | 9.950 |
| 7232AC | 160 | 290 | 48 | 1700 | 2400 | 250 | 288 | 15.49 |
| 7234AC | 170 | 310 | 52 | 1600 | 2200 | 281 | 341 | 19.69 |
| 7236AC | 180 | 320 | 52 | 2200 | 2700 | 293 | 362 | 20.26 |
| 7238AC | 190 | 340 | 55 | 2000 | 2500 | 303 | 390 | 24.31 |
| 7240AC | 200 | 360 | 58 | 1300 | 1800 | 343 | 449 | 28.82 |
| 7244AC | 220 | 400 | 65 | 1100 | 1600 | 358 | 482 | 33.60 |
| 7248AC | 240 | 440 | 72 | 1500 | 1800 | 403 | 595 | 51.8 |
/* 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(/(.*?):(.*)$/))&&1
| Contact Angle: | 25° |
|---|---|
| Aligning: | Aligning Bearing |
| Separated: | Unseparated |
| Rows Number: | Single |
| Load Direction: | Radial Bearing |
| Material: | Bearing Steel |
| Samples: |
US$ 5/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
| Customized Request |
|---|

What are the Challenges Associated with Noise Reduction in Ball Bearings?
Noise reduction in ball bearings is a crucial consideration, especially in applications where noise levels must be minimized for operational efficiency and user comfort. While ball bearings are designed to operate smoothly, there are several challenges associated with reducing noise in their operation:
- Vibration:
Vibration generated by the movement of rolling elements and raceways can lead to noise. Even minor irregularities in bearing components or the mounting system can cause vibration that translates into audible noise.
- Bearing Type and Design:
The type and design of the ball bearing can impact noise generation. For example, deep groove ball bearings are known for their quiet operation, while angular contact bearings can generate more noise due to their higher contact angles.
- Lubrication:
Improper or inadequate lubrication can result in increased friction and wear, leading to noise. Choosing the right lubricant and maintaining proper lubrication levels are essential for reducing noise in ball bearings.
- Bearing Clearance and Preload:
Incorrect clearance or preload settings can lead to noise issues. Excessive clearance or inadequate preload can cause the rolling elements to impact the raceways, resulting in noise during rotation.
- Material and Manufacturing Quality:
The quality of materials and manufacturing processes can affect noise levels. Inconsistent or low-quality materials, improper heat treatment, or manufacturing defects can lead to noise generation during operation.
- Surface Finish:
The surface finish of the rolling elements and raceways can impact noise. Rough surfaces can generate more noise due to increased friction and potential irregularities.
- Sealing and Shielding:
Seals and shields that protect bearings can influence noise levels. While they are necessary for contamination prevention, they can also cause additional friction and generate noise.
- Operating Conditions:
External factors such as temperature, speed, and load can influence noise levels. High speeds or heavy loads can amplify noise due to increased stress on the bearing components.
- Wear and Deterioration:
As ball bearings wear over time, noise levels can increase. Worn components or inadequate lubrication can lead to more significant noise issues as the bearing operates.
To address these challenges and reduce noise in ball bearings, manufacturers and engineers employ various techniques, such as optimizing design, selecting suitable bearing types, using proper lubrication, maintaining accurate preload settings, and ensuring high-quality materials and manufacturing processes. Noise reduction efforts are essential to improve overall product quality, meet noise regulations, and enhance user experience in various applications.

How do Temperature and Environmental Conditions Affect the Performance of Ball Bearings?
Temperature and environmental conditions have a significant impact on the performance and longevity of ball bearings. The operating environment can influence factors such as lubrication effectiveness, material properties, and overall bearing behavior. Here’s how temperature and environmental conditions affect ball bearing performance:
- Lubrication:
Temperature variations can affect the viscosity and flow characteristics of lubricants. Extreme temperatures can cause lubricants to become too thin or too thick, leading to inadequate lubrication and increased friction. In high-temperature environments, lubricants can degrade, reducing their effectiveness.
- Material Properties:
Temperature changes can alter the material properties of the bearing components. High temperatures can lead to thermal expansion, affecting bearing clearances and potentially causing interference between components. Extreme cold temperatures can make materials more brittle and prone to fracture.
- Clearance Changes:
Temperature fluctuations can cause changes in the internal clearance of ball bearings. For instance, at high temperatures, materials expand, leading to increased clearance. This can affect bearing performance, load distribution, and overall stability.
- Corrosion and Contamination:
Harsh environmental conditions, such as exposure to moisture, chemicals, or abrasive particles, can lead to corrosion and contamination of bearing components. Corrosion weakens the material, while contamination accelerates wear and reduces bearing life.
- Thermal Stress:
Rapid temperature changes can result in thermal stress within the bearing components. Differential expansion and contraction between the inner and outer rings can lead to stress and distortion, affecting precision and bearing integrity.
- Noise and Vibration:
Temperature-related changes in material properties and internal clearances can influence noise and vibration levels. Extreme temperatures can lead to increased noise generation and vibration, affecting the overall operation of machinery.
- Lubricant Degradation:
Environmental factors like humidity, dust, and contaminants can lead to premature lubricant degradation. Oxidation, moisture absorption, and the presence of foreign particles can compromise the lubricant’s performance and contribute to increased friction and wear.
- Seal Effectiveness:
Seals and shields that protect bearings from contaminants can be affected by temperature fluctuations. Extreme temperatures can lead to seal hardening, cracking, or deformation, compromising their effectiveness in preventing contamination.
- Choosing Appropriate Bearings:
When selecting ball bearings for specific applications, engineers must consider the expected temperature and environmental conditions. High-temperature bearings, bearings with specialized coatings, and those with enhanced sealing mechanisms may be necessary to ensure reliable performance.
Overall, understanding the impact of temperature and environmental conditions on ball bearing performance is crucial for proper bearing selection, maintenance, and ensuring optimal operation in diverse industries and applications.

What are the Different Components that Make up a Typical Ball Bearing?
A typical ball bearing consists of several essential components that work together to reduce friction and support loads. Here are the main components that make up a ball bearing:
- Outer Ring:
The outer ring is the stationary part of the bearing that provides support and houses the other components. It contains raceways (grooves) that guide the balls’ movement.
- Inner Ring:
The inner ring is the rotating part of the bearing that attaches to the shaft. It also contains raceways that correspond to those on the outer ring, allowing the balls to roll smoothly.
- Balls:
The spherical balls are the rolling elements that reduce friction between the inner and outer rings. Their smooth rolling motion enables efficient movement and load distribution.
- Cage or Retainer:
The cage, also known as the retainer, maintains a consistent spacing between the balls. It prevents the balls from touching each other, reducing friction and preventing jamming.
- Seals and Shields:
Many ball bearings include seals or shields to protect the internal components from contaminants and retain lubrication. Seals provide better protection against contaminants, while shields offer less resistance to rotation.
- Lubricant:
Lubrication is essential to reduce friction, wear, and heat generation. Bearings are typically filled with lubricants that ensure smooth movement between the balls and raceways.
- Flanges and Snap Rings:
In some designs, flanges or snap rings are added to help position and secure the bearing in its housing or on the shaft. Flanges prevent axial movement, while snap rings secure the bearing radially.
- Raceways:
Raceways are the grooved tracks on the inner and outer rings where the balls roll. The shape and design of the raceways influence the bearing’s load-carrying capacity and performance.
- Anti-Friction Shield:
In certain high-speed applications, a thin anti-friction shield can be placed between the inner and outer rings to minimize friction and heat generation.
These components work together to enable the smooth rolling motion, load support, and reduced friction that characterize ball bearings. The proper design and assembly of these components ensure the bearing’s optimal performance and longevity in various applications.


editor by CX 2024-05-02
China Good quality Low Price High Quality Deep Groove Ball Bearing 6007 for Auto Bearing double row ball bearing
Product Description
Low Price High Quality Deep Groove Ball Bearing 6pcs spark plugs per day.
Q3: How about your delivery time ?
A3: Delivery time is 20days after you confirmed order.
Q4: What is the benefit for the exclusive agency?
A4: 1.Market Protection
2.Special price or discount in some months
3.Priority delivery
4.Free promotion materials:T-shirt
Q7:Can you produce bearing with our sample?
A7:Yes ,we can.and we will make new CZPT according to your samples.
/* 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(/(.*?):(.*)$/))&&1
| Separated: | Separated |
|---|---|
| Rows Number: | Double |
| Material: | Bearing Steel |
| Item Name: | Premium Ball Bearing |
| Item Model: | Zz RS Series Ball Bearing |
| Bearing Material: | Ball Bearing Steel / Stainless Steel /Carbon Steel |
| Samples: |
US$ 0/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
| Customized Request |
|---|

What are the Common Signs of Wear or Damage in Ball Bearings that Indicate the Need for Replacement?
Ball bearings are subjected to wear and stress during operation, and over time, they may exhibit signs of damage or deterioration that warrant replacement. Recognizing these signs is crucial to prevent catastrophic failure and ensure safe and reliable operation. Here are the common signs of wear or damage in ball bearings:
- Unusual Noise:
If you hear unusual grinding, clicking, or rumbling noises coming from the bearing during operation, it may indicate worn-out or damaged components. Unusual noise suggests that the bearing is no longer operating smoothly.
- Vibration:
Excessive vibration in the machinery can be a sign of bearing wear. Vibrations can result from uneven wear, misalignment, or damaged components within the bearing.
- Increased Temperature:
Higher operating temperatures than usual may indicate increased friction due to inadequate lubrication, wear, or other issues. Monitoring the bearing’s temperature can help identify potential problems.
- Irregular Movement:
If you notice irregular movement, jerking, or sticking during rotation, it could be a sign that the bearing is no longer operating smoothly. This may be due to damaged rolling elements or raceways.
- Reduced Performance:
If the machinery’s performance has decreased, it may be due to a compromised bearing. Reduced efficiency, increased energy consumption, or a decline in overall performance could be indicators of bearing wear.
- Visible Wear or Damage:
Inspect the bearing for visible signs of wear, such as pitting, scoring, or discoloration on the rolling elements or raceways. Severe wear or damage is a clear indication that the bearing needs replacement.
- Leakage or Contamination:
If there is evidence of lubricant leakage, contamination, or the presence of foreign particles around the bearing, it suggests that the seal or shield may be compromised, leading to potential damage.
- Looseness or Excessive Play:
If you can feel excessive play or looseness when manually moving the bearing, it could indicate worn-out components or misalignment.
- Reduced Lifespan:
If the bearing’s expected lifespan is significantly shorter than usual, it may be due to inadequate lubrication, excessive loads, or improper installation, leading to accelerated wear.
- Frequent Failures:
If the bearing is consistently failing despite regular maintenance and proper use, it could indicate a chronic issue that requires addressing, such as inadequate lubrication or misalignment.
It’s important to conduct regular inspections, monitor performance, and address any signs of wear or damage promptly. Replacing worn or damaged ball bearings in a timely manner can prevent further damage to machinery, reduce downtime, and ensure safe and efficient operation.

What Precautions should be taken to Prevent Contamination of Ball Bearings in Industrial Settings?
Preventing contamination of ball bearings is essential to ensure their proper function, longevity, and overall performance in industrial settings. Contaminants such as dust, dirt, debris, and particles can significantly impact bearing operation. Here are important precautions to take to prevent contamination of ball bearings:
- Effective Sealing:
Choose ball bearings with appropriate seals or shields to prevent the ingress of contaminants. Seals provide a physical barrier against dust, moisture, and particles, ensuring the bearing’s interior remains clean.
- Clean Environment:
Maintain a clean working environment around the machinery and equipment. Regularly clean the surrounding areas to prevent the accumulation of dirt and debris that could enter the bearings.
- Proper Handling:
Handle bearings with clean hands and use gloves if necessary. Avoid touching the bearing surfaces with bare hands, as natural skin oils can transfer contaminants onto the bearing.
- Clean Tools and Equipment:
Use clean tools and equipment during installation and maintenance to prevent introducing contaminants. Ensure that tools are properly cleaned before coming into contact with the bearing components.
- Contamination-Controlled Workstations:
Establish contamination-controlled workstations for bearing handling, installation, and maintenance. These areas should have proper ventilation, filtered air, and minimal exposure to external contaminants.
- Proper Lubrication:
Use the correct lubricant in appropriate quantities. Lubricants help create a barrier against contaminants and reduce friction. Regularly inspect and replenish lubrication to maintain its effectiveness.
- Regular Inspections:
Implement a routine inspection schedule to monitor the condition of the bearings. Look for signs of contamination, wear, and damage. Address any issues promptly to prevent further damage.
- Training and Education:
Train personnel on proper handling, installation, and maintenance practices to minimize the risk of contamination. Educated employees are more likely to take precautions and prevent accidental contamination.
- Environmental Controls:
In sensitive environments, such as clean rooms or medical facilities, implement strict environmental controls to minimize the presence of contaminants that could affect bearing performance.
- Regular Cleaning and Maintenance:
Perform regular cleaning and maintenance of machinery and equipment to prevent the buildup of contaminants. Keep bearings protected during maintenance to prevent debris from entering during the process.
- Selection of Suitable Bearings:
Choose bearings that are specifically designed for the application’s environmental conditions. Some bearings have advanced sealing options or specialized coatings that enhance contamination resistance.
By implementing these precautions, industries can significantly reduce the risk of contamination in ball bearings, ensuring smooth operation, extended bearing life, and enhanced equipment reliability.

What is a Ball Bearing and How does it Function in Various Applications?
A ball bearing is a type of rolling-element bearing that uses balls to reduce friction between moving parts and support radial and axial loads. It consists of an outer ring, an inner ring, a set of balls, and a cage that separates and maintains a consistent spacing between the balls. Here’s how ball bearings function in various applications:
- Reduction of Friction:
Ball bearings function by replacing sliding friction with rolling friction. The smooth, spherical balls minimize the contact area between the inner and outer rings, resulting in lower friction and reduced heat generation.
- Radial and Axial Load Support:
Ball bearings are designed to support both radial loads (forces perpendicular to the shaft’s axis) and axial loads (forces parallel to the shaft’s axis). The distribution of balls within the bearing ensures load-carrying capacity in multiple directions.
- Smooth Rotational Movement:
Ball bearings facilitate smooth and precise rotational movement. The rolling motion of the balls allows for controlled and continuous rotation with minimal resistance.
- Applications in Machinery:
Ball bearings are used in a wide range of machinery and equipment, including motors, generators, gearboxes, conveyors, and fans. They enable the efficient transfer of motion while reducing wear and energy losses.
- Automotive Industry:
Ball bearings are extensively used in automobiles for various applications, including wheel hubs, transmission systems, steering mechanisms, and engine components. They provide reliability and durability in challenging automotive environments.
- Industrial Machinery:
In industrial settings, ball bearings support rotating shafts and ensure the smooth operation of equipment such as pumps, compressors, and machine tools.
- High-Speed Applications:
Ball bearings are suitable for high-speed applications due to their low friction and ability to accommodate rapid rotation. They are used in applications like electric motors and aerospace components.
- Precision Instruments:
For precision instruments, such as watches, cameras, and medical devices, ball bearings provide accurate rotational movement and contribute to the overall performance of the instrument.
- Variety of Sizes and Types:
Ball bearings come in various sizes, configurations, and materials to suit different applications. Different types include deep groove ball bearings, angular contact ball bearings, thrust ball bearings, and more.
In summary, ball bearings are essential components in a wide range of applications where smooth rotation, load support, and reduced friction are critical. Their versatility, reliability, and efficiency make them indispensable in industries spanning from automotive to industrial machinery to precision instruments.


editor by CX 2024-04-24
China Good quality Factory Price 635 Low Profile Ball Bearing for Lifting Machine and Sliding Door&Window Size 5*19*6mm bearing and race
Product Description
Detailed Photos
Product Description
Our precision deep groove ball bearings are designed for high precision, low noise, small vibration, high reliability and long life. They are mainly used in various types of electric motors. They are also known as EMQ (Electric Motor Quality) bearings.
EMQ bearings are widely used in household appliances, toys, electric power tools, car motors and other fields. With optimal design, high reliability heat treatment, precision manufacturing processes and high-grade grease, these products perform better on reliability, vibration and noise levels than standard products making them more suitable for electric motor applications. These products can also be applied to most gearbox applications as well.
| Item | Deep Groove Ball Bearing | Closure type | ZZ/RS |
| OEM ODM | Technical drawing or sample is needed | d(mm) | 5 |
| Original | ZheJiang , China | D(mm) | 19 |
| Material | Chrome steel, Carbon steel, Stainless steel, etc. | B(mm) | 6 |
| Cage Material | Steel / Nylon | Number of row | single |
| Tolerance | P0 P6 P5 P2 P4 | Clearance | C0 C2 C3 C4 |
| Vibration | V1 V2 V3 | Noise | Z1 Z2 Z3 Z4 |
| MOQ | 1000 pcs | Application | Motor/electric/sliding/furniture accessories/ Skateboard/etc. |
| Feature | heavy-duty,adjustable,low noise, easy installation,sliding smoothly,long life,standard,customized,etc | Leading Time | According to the order q’ty |
Company Profile
ABOUT US
Haibite was set up in 1996 and located at HangZhou, a beautiful city in China, covering an area of 16000 square meters. Our company is bearing manufacturer&bearing distributor.
We have own factory that specialize in the production of bearings. We are in a good position to supply you high quality bearing, the finest price and customized service.
Since it was first established, Haibite was dedicated in research, development and manufacture of bearings.
Haibite deep groove ball bearing has numerous technical advantages, such as increased service life of bearing over a broad of operating temperature and all these combined with the highest level of cost effectiveness.
Now, Haibite has become main and 1 of the first grade suppliers of all kinds of bearings. We could develop the products constructed from different materials, structures, shapes, colors etc.
1. Our bearing are in stable quality with smooth rotation, long life operation, small movement, advanced heat treatment etc.
2. The Balls with smooth and long lasting operation, higher performing features like wider adjustment ranges, long rolling life performance, easy installment. It’s adapt in multiple housing choices with any wheels to fit different aluminnum. Our bearing ensure alignment across the full adjustment ranges within built-in retention system.
3. If you need, we also could offer customized hardware service, like plastic parts, stamping patrs, cold forging steel patrs are widely applied in the window and doors, furniture, householders, transmission system, industrial drive system etc.
We are constantly improving and striving for excellent service. We hold a very high regard for our customers, the quality of our products, and our level of customer service.
Packaging & Shipping
Packaging Details
Packaging
A.Polybag +Box+Carton
B.B.Tube+Box+Carton
C.As per customer’s request
We have kinds of packages, such as plastic bags, cartons, special boxes. We use different packages based on the products and our customers’ requirements.
Port :HangZhou
Our Advantages
FAQ
If you have any other questions, please feel free to contact us as follows.
Q: Why did you choose us?
A. We provide the best quality bearings with reasonable price, low friction, low noise and long service life.
B. With sufficient stock and fast delivery, you can choose our freight forwarder or your freight forwarder.
C. The best service provided by a well-trained international sales team.
Q: Do you accept small orders?
100% quality check, once your bearings are standard size bearings, even one, we also accept.
Q: Do you provide samples? Is it free or extra?
Yes, we can provide a small amount of free samples. Do you mind paying the freight?
Q: What should I do if I don’t see the type of bearings I need?
We have too many bearing series numbers. Sometimes we can’t put them all on web. Just send us the inquiry and we will be very happy to send you the bearing details.
Q: What services can we provide?
Accepted Delivery Terms: FOB, CFR, CIF, EXW;
Accepted Payment Currency: USD, EUR, JPY, CNY;
Accepted Payment Type: T/T, L/C, D/P, D/A
Language Spoken: English, Chinese;
Purchase Notice
1. Please send us an inquiry or leave us a message, there will be a dedicated staff to serve you within 1 hours.
2. You can ask us to take actual photos of the products for you, and free samples would be provide.
3. Welcome to visit our factory to negotiate orders, we will do our best to protect the safety of your business journey.
4. Packaging can be customized according to customer requirements.
Finally, please be sure to click “Contact Supplier” to contact us, or “call us” with any questions that you may have.
Welcome to contact me anytime!
| Aligning: | Aligning Bearing |
|---|---|
| Separated: | Unseparated |
| Rows Number: | Single |
| Samples: |
US$ 0.5/Piece
1 Piece(Min.Order) | Order Sample |
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| Customization: |
Available
| Customized Request |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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What are the Challenges Associated with Noise Reduction in Ball Bearings?
Noise reduction in ball bearings is a crucial consideration, especially in applications where noise levels must be minimized for operational efficiency and user comfort. While ball bearings are designed to operate smoothly, there are several challenges associated with reducing noise in their operation:
- Vibration:
Vibration generated by the movement of rolling elements and raceways can lead to noise. Even minor irregularities in bearing components or the mounting system can cause vibration that translates into audible noise.
- Bearing Type and Design:
The type and design of the ball bearing can impact noise generation. For example, deep groove ball bearings are known for their quiet operation, while angular contact bearings can generate more noise due to their higher contact angles.
- Lubrication:
Improper or inadequate lubrication can result in increased friction and wear, leading to noise. Choosing the right lubricant and maintaining proper lubrication levels are essential for reducing noise in ball bearings.
- Bearing Clearance and Preload:
Incorrect clearance or preload settings can lead to noise issues. Excessive clearance or inadequate preload can cause the rolling elements to impact the raceways, resulting in noise during rotation.
- Material and Manufacturing Quality:
The quality of materials and manufacturing processes can affect noise levels. Inconsistent or low-quality materials, improper heat treatment, or manufacturing defects can lead to noise generation during operation.
- Surface Finish:
The surface finish of the rolling elements and raceways can impact noise. Rough surfaces can generate more noise due to increased friction and potential irregularities.
- Sealing and Shielding:
Seals and shields that protect bearings can influence noise levels. While they are necessary for contamination prevention, they can also cause additional friction and generate noise.
- Operating Conditions:
External factors such as temperature, speed, and load can influence noise levels. High speeds or heavy loads can amplify noise due to increased stress on the bearing components.
- Wear and Deterioration:
As ball bearings wear over time, noise levels can increase. Worn components or inadequate lubrication can lead to more significant noise issues as the bearing operates.
To address these challenges and reduce noise in ball bearings, manufacturers and engineers employ various techniques, such as optimizing design, selecting suitable bearing types, using proper lubrication, maintaining accurate preload settings, and ensuring high-quality materials and manufacturing processes. Noise reduction efforts are essential to improve overall product quality, meet noise regulations, and enhance user experience in various applications.

What are the Differences between Deep Groove Ball Bearings and Angular Contact Ball Bearings?
Deep groove ball bearings and angular contact ball bearings are two common types of ball bearings, each designed for specific applications and load conditions. Here are the key differences between these two types of bearings:
- Design and Geometry:
Deep Groove Ball Bearings:
Deep groove ball bearings have a simple design with a single row of balls that run along deep raceways in both the inner and outer rings. The rings are usually symmetrical and non-separable, resulting in a balanced load distribution.
Angular Contact Ball Bearings:
Angular contact ball bearings have a more complex design with two rows of balls, oriented at an angle to the bearing’s axis. This arrangement allows for the transmission of both radial and axial loads, making them suitable for combined loads and applications requiring high precision.
- Load Carrying Capacity:
Deep Groove Ball Bearings:
Deep groove ball bearings are primarily designed to carry radial loads. They can handle axial loads in both directions, but their axial load-carrying capacity is generally lower compared to angular contact ball bearings.
Angular Contact Ball Bearings:
Angular contact ball bearings are specifically designed to handle both radial and axial loads. The contact angle between the rows of balls determines the bearings’ axial load-carrying capacity. They can handle higher axial loads and are commonly used in applications with thrust loads.
- Contact Angle:
Deep Groove Ball Bearings:
Deep groove ball bearings have no defined contact angle, as the balls move in a deep groove along the raceways. They are primarily designed for radial loads.
Angular Contact Ball Bearings:
Angular contact ball bearings have a specified contact angle between the rows of balls. This contact angle allows them to carry both radial and axial loads and is crucial for their ability to handle combined loads.
- Applications:
Deep Groove Ball Bearings:
Deep groove ball bearings are commonly used in applications that primarily require radial loads, such as electric motors, pumps, and conveyor systems. They are also suitable for high-speed operation.
Angular Contact Ball Bearings:
Angular contact ball bearings are used in applications where both radial and axial loads are present, such as in machine tools, automotive wheel hubs, and aerospace components. They are especially useful for applications that require precise axial positioning and handling of thrust loads.
- Limitations:
Deep Groove Ball Bearings:
Deep groove ball bearings are not as suitable for handling significant axial loads and may experience skidding under certain conditions due to their deep raceways.
Angular Contact Ball Bearings:
Angular contact ball bearings can experience increased heat generation and wear at higher speeds due to the contact angle of the balls.
In summary, the design, load-carrying capacity, contact angle, and applications differ between deep groove ball bearings and angular contact ball bearings. Choosing the appropriate type depends on the specific load conditions and requirements of the application.

What Factors should be Considered when Selecting a Ball Bearing for a Particular Application?
Selecting the right ball bearing for a specific application involves careful consideration of various factors to ensure optimal performance, longevity, and reliability. Here are the key factors that should be taken into account:
- Load Type and Magnitude:
Determine the type of load (radial, axial, or combined) and the magnitude of the load that the bearing will need to support. Choose a bearing with the appropriate load-carrying capacity to ensure reliable operation.
- Speed and Operating Conditions:
Consider the rotational speed of the application and the operating conditions, such as temperature, humidity, and exposure to contaminants. Different bearing types and materials are suited for varying speeds and environments.
- Accuracy and Precision:
For applications requiring high accuracy and precision, such as machine tool spindles or optical instruments, choose high-precision bearings that can maintain tight tolerances and minimize runout.
- Space Limitations:
If the application has limited space, choose miniature or compact ball bearings that can fit within the available dimensions without compromising performance.
- Thrust and Radial Loads:
Determine whether the application requires predominantly thrust or radial load support. Choose the appropriate type of ball bearing (thrust, radial, or angular contact) based on the primary load direction.
- Alignment and Misalignment:
If the application experiences misalignment between the shaft and housing, consider self-aligning ball bearings that can accommodate angular misalignment.
- Mounting and Installation:
Consider the ease of mounting and dismounting the bearing. Some applications may benefit from features like flanges or snap rings for secure installation.
- Lubrication and Maintenance:
Choose a bearing with appropriate lubrication options based on the application’s speed and temperature range. Consider whether seals or shields are necessary to protect the bearing from contaminants.
- Environmental Conditions:
Factor in the operating environment, including exposure to corrosive substances, chemicals, water, or dust. Choose materials and coatings that can withstand the specific environmental challenges.
- Bearing Material:
Select a bearing material that suits the application’s requirements. Common materials include stainless steel for corrosion resistance and high-carbon chrome steel for general applications.
- Bearing Arrangement:
Consider whether a single-row, double-row, or multiple bearings in a specific arrangement are needed to accommodate the loads and moments present in the application.
By carefully evaluating these factors, engineers and designers can choose the most suitable ball bearing that aligns with the specific demands of the application, ensuring optimal performance, durability, and overall operational efficiency.


editor by CX 2023-11-10