Product Description

The rings and balls of all-ceramic deep groove ball bearings are made of silicon nitride (Si3N4) ceramic material. This bearing can be designed as a full ball or with PTFE, PEEK or stainless steel 304/316 cage. PTFE is the default standard cage.
Full ceramic deep groove ball bearings have the characteristics of non-magnetic and electrical insulation, wear-resistant and corrosion-resistant, oil-free and self-lubricating, high temperature and cold resistance, and can be used in extremely harsh environments and special working conditions. It can be used in high temperature environment above 400ºC under the condition of full ball or equipped with stainless steel 316 cage. The PEEK cage can also be used at temperatures above 250°C. For CZPT temperatures (for example, lower than -70°C), full ceramic bearings with PTFE cages or stainless steel 316 cages can be used. Normally, the normal radial clearance is C0. When it is necessary to adapt to the extreme environment, other clearances can be customized.

model size(mm)   Installation size (mm) weight weight
da Da ra (kg) (kg)
d D B r(min)  r1(min) min max max ZrO2 Si3N4
7900 10 22 6 0.3 0.15 12.5 19.5 0.3 0.007 0.0038
7000 26 8 0.3 0.15 12.5 23.5 0.3 0.014 0.0075
7200 30 9 0.6 0.3 15 25 0.6 0.571 0.013
7300 35 11 0.6 0.3 15 30 0.6 0.04 0.571
7901 12 24 6 0.3 0.15 14.5 21.5 0.3 0.008 0.0042
7001 28 8 0.3 0.15 14.5 25.5 0.3 0.017 0.0092
7201 32 10 0.6 0.3 17 27 0.6 0.571 0.015
7301 37 12 1 0.6 18 31 1 0.046 0.571
7902 15 28 7 0.3 0.15 17.5 25.5 0.3 0.012 0.0063
7002 32 9 0.3 0.15 17.5 29.5 0.3 0.571 0.013
7202 35 11 0.6 0.3 20 30 0.3 0.035 0.019
7302 42 13 1 0.6 21 36 1 0.064 0.035
7903 17 30 7 0.3 0.15 19.5 27.5 0.3 0.013 0.0071
7003 35 10 0.3 0.15 19.5 32.5 0.3 0.032 0.017
7203 40 12 0.6 0.3 22 35 0.6 0.052 0.571
7303 47 14 1 0.6 23 41 1 0.087 0.047
7904 20 37 9 0.3 0.15 22.5 34.5 0.3 0.571 0.015
7004 42 12 0.6 0.3 25 37 0.6 0.052 0.571
7204 47 14 1 0.6 26 41 1 0.082 0.045
7304 52 15 1.1 0.6 27 45 1 0.11 0.06
7905 25 42 9 0.3 0.15 27.5 39.5 0.3 0.032 0.018
7005 47 12 0.6 0.3 30 42 0.6 0.061 0.033
7205 52 15 1 0.6 31 46 1 0.099 0.054
7305 62 17 1.1 0.6 32 55 1 0.18 0.098
7906 30 47 9 0.3 0.15 32.5 44.5 1 0.04 0.571
7006 55 13 1 0.6 36 49 1 0.089 0.048
7206 62 16 1 0.6 36 56 1 0.15 0.083
7306 72 19 1.1 0.6 37 65 1 0.27 0.14
7907 35 55 10 0.6 0.3 40 50 0.6 0.058 0.031
7007 62 14 1 0.6 41 56 1 0.12 0.063
7207 72 17 1.1 0.6 42 65 1 0.22 0.12
7307 80 21 1.5 1 44 71 1.5 0.36 0.19
7908 40 62 12 0.6 0.3 45 57 0.6 0.09 0.05
7008 68 15 1 0.6 46 62 1 0.15 0.08
7208 80 18 1.1 0.6 47 73 1 0.28 0.15
7308 90 23 1.5 1 49 81 1.5 0.49 0.27
7909 45 68 12 0.6 0.3 50 63 0.6 0.097 0.053
7009 75 16 1 0.6 51 69 1 0.19 0.1
7209 85 19 1.1 0.6 52 78 1 0.32 0.175
7309 100 25 1.5 1 54 91 1.5 0.64 0.345
7910 50 72 12 0.6 0.3 55 67 0.6 0.1 0.06
7571 80 16 1 0.6 56 74 1 0.2 0.11
7210 90 20 1.1 0.6 57 83 1 0.35 0.19
7310 110 27 2 1 60 100 2 0.82 0.44
7911 55 80 13 1 0.6 61 74 1 0.15 0.08
7011 90 18 1.1 0.6 62 83 1 0.29 0.16
7211 100 21 1.5 1 64 91 1.5 0.48 0.26
7311 120 29 2 1 65 110 2 1.05 0.57
7912 60 85 13 1 0.6 66 79 1 0.15 0.08
7012 95 18 1.1 0.6 67 88 1 0.32 0.17
7212 110 22 1.5 1 69 101 1.5 0.6 0.33
7312 130 31 2.1 1.1 72 118 2 1.32 0.72
7913 65 90 13 1 0.6 71 84 1 0.17 0.09
7013 100 18 1.1 0.6 72 93 1 0.34 0.18
7213 120 23 1.5 1 74 111 1.5 0.77 0.42
7313 140 33 2.1 1.1 77 128 2 1.62 0.88
7914 70 100 16 1 0.6 76 94 1 0.27 0.15
7014 110 20 1.1 0.6 77 103 1 0.47 0.25
7214 125 24 1.5 1 79 116 1.5 0.84 0.45
7314 150 35 2.1 1.1 82 138 2 1.98 1.07
7915 75 105 16 1 0.6 81 99 1 0.28 0.15
7015 115 20 1.1 0.6 82 108 1 0.5 0.27
7215 130 25 1.5 1 84 121 1.5 0.92 0.5
7916 80 110 16 1 0.6 86 104 1 0.3 0.16
7016 125 22 1.1 0.6 87 118 1 0.67 0.36
7216 140 26 2 1 90 130 2 1.09 0.59
7017 85 130 22 1.1 0.6 92 123 1 0.71 0.38
7217 150 28 2 1 95 140 2 1.35 0.73
7918 90 125 18 1.1 0.6 97 118 1 0.45 0.24
7018 140 24 1.5 1 99 131 1.5 0.92 0.5
7919 95 130 18 1.1 0.6 102 123 1 0.46 0.25
7019 145 24 1.5 1 104 136 1.5 0.95 0.51
7920 100 140 20 1.1 0.6 107 133 1 0.64 0.35
7571 150 24 1.5 1 109 141 1.5 0.99 0.54
7921 105 145 20 1.1 0.6 112 138 1 0.66 0.36
7922 110 150 20 1.1 0.6 117 143 1 0.69 0.37

About us
ZheJiang REET BEARING.CO.,LTD is a professional bearing manufacturer and exporter.
We have a wealth of technical.All producing processes are finished in our manufactory. As an ISO9001:2000 certified manufacturer,we will solve various problems in application and use of our bearings. 
Our company is an authorized distributor of FAG, INA, CZPT and other world brand bearings.Our company has the right to self-export bearings and launches its own brand RTB.
Our bearing had been exported to more than 20 countries worldwide and are warmly welcomed.
We are looking forward to your order.
FAQ

1.Is the company a production factory or a trading company?
ZheJiang REET BEARING CO.,LTD is a manufacturing enterprise focusing on bearings and integrating research, production and sales.

2.How many the MOQ of your company?
Depending on the size of the bearing, the MOQ is variable, if you are interested, you can contact me for a quote.

3.Does the company accept OEM or customized bearings?
In addition to standard products, we also supply non-standard and modified standard products for special application. Meanwhile, we provide OEM service.

4.Can the company provide free samples?
We can provide samples for free. You only need to provide shipping.

5.What are the company’s delivery terms?
We can accept EXW,FOB,CFR,CIF,etc. You can choose the 1 which is the most convenient cost effective for you.
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Zro2 Weight: 0.64
Si3n4 Weight: 0.345
Model: 7309
R1(Min): 1
Contact Angle: 15°
Aligning: Aligning Bearing
Samples:
US$ 2/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

ball bearing

What are the Materials Typically Used in Manufacturing Ball Bearings and Their Advantages?

Ball bearings are manufactured using a variety of materials, each chosen for its specific properties and advantages in various applications. Here are some commonly used materials in ball bearing manufacturing and their respective benefits:

  • High-Carbon Chrome Steel (AISI 52100):

This is the most common material used for ball bearing manufacturing. It offers excellent hardness, wear resistance, and fatigue strength. High-carbon chrome steel bearings are suitable for a wide range of applications, from industrial machinery to automotive components.

  • Stainless Steel (AISI 440C, AISI 304, AISI 316):

Stainless steel bearings are corrosion-resistant and suitable for applications where moisture, chemicals, or exposure to harsh environments are concerns. AISI 440C offers high hardness and corrosion resistance, while AISI 304 and AISI 316 provide good corrosion resistance and are often used in food and medical industries.

  • Ceramic:

Ceramic bearings use silicon nitride (Si3N4) or zirconia (ZrO2) balls. Ceramic materials offer high stiffness, low density, and excellent resistance to corrosion and heat. Ceramic bearings are commonly used in high-speed and high-temperature applications, such as in aerospace and racing industries.

  • Plastic (Polyamide, PEEK):

Plastic bearings are lightweight and offer good corrosion resistance. Polyamide bearings are commonly used due to their low friction and wear properties. Polyether ether ketone (PEEK) bearings provide high-temperature resistance and are suitable for demanding environments.

  • Bronze:

Bronze bearings are often used in applications where self-lubrication is required. Bronze has good thermal conductivity and wear resistance. Bearings made from bronze are commonly used in machinery requiring frequent starts and stops.

  • Hybrid Bearings:

Hybrid bearings combine steel rings with ceramic balls. These bearings offer a balance between the advantages of both materials, such as improved stiffness and reduced weight. Hybrid bearings are used in applications where high speeds and low friction are essential.

  • Specialty Alloys:

For specific applications, specialty alloys may be used to meet unique requirements. For example, bearings used in extreme temperatures or corrosive environments may be made from materials like titanium or hastelloy.

  • Coated Bearings:

Bearings may also be coated with thin layers of materials like diamond-like carbon (DLC) or other coatings to enhance performance, reduce friction, and improve wear resistance.

The choice of material depends on factors such as application requirements, operating conditions, load, speed, and environmental factors. Selecting the right material is essential for ensuring optimal bearing performance, longevity, and reliability in diverse industries and applications.

ball bearing

Are there any Industry Standards or Certifications that Ball Bearings should Meet?

Yes, there are several industry standards and certifications that ball bearings should meet to ensure their quality, performance, and reliability. These standards help manufacturers, engineers, and customers assess the suitability of bearings for specific applications. Some of the key standards and certifications for ball bearings include:

  • ISO Standards:

The International Organization for Standardization (ISO) has developed a series of standards related to ball bearings. ISO 15 defines dimensions, boundary dimensions, and tolerances for radial bearings. ISO 281 specifies dynamic load ratings and calculation methods for bearings’ life calculations.

  • ABEC (Annular Bearing Engineering Committee) Ratings:

ABEC ratings are commonly used in North America to indicate the precision and performance of ball bearings. Ratings range from ABEC 1 (lowest precision) to ABEC 9 (highest precision). However, it’s important to note that ABEC ratings focus primarily on dimensional tolerances and do not encompass all aspects of bearing quality.

  • DIN Standards:

The German Institute for Standardization (Deutsches Institut für Normung, DIN) has published various standards related to ball bearings. DIN 625 covers dimensions for deep groove ball bearings, while DIN 616 provides guidelines for precision angular contact ball bearings.

  • JIS (Japanese Industrial Standards):

JIS standards are used in Japan and internationally to define the characteristics and dimensions of various products, including ball bearings. JIS B 1512 outlines the classification and dimensions of rolling bearings.

  • ASTM (American Society for Testing and Materials) Standards:

ASTM has standards that cover various aspects of bearing testing, performance, and materials. ASTM F2215, for instance, specifies the requirements for ball bearings used in surgical implants.

  • CE Marking:

CE marking indicates that a product complies with European Union health, safety, and environmental requirements. It may be required for bearings used in machinery intended to be sold within the EU market.

  • Industry-Specific Standards:

Various industries, such as aerospace, automotive, medical, and nuclear, have specific standards or certifications that bearings must meet to ensure safety, reliability, and compliance with industry-specific requirements.

  • Quality Management Systems:

Manufacturers that adhere to quality management systems, such as ISO 9001, demonstrate their commitment to consistent product quality and customer satisfaction. Certification to these systems indicates that the manufacturing process follows established protocols and best practices.

When selecting ball bearings, it’s important to consider the relevant standards and certifications that align with the application’s requirements. This ensures that the bearings meet recognized quality and performance criteria, ultimately contributing to reliable and efficient operation.

ball bearing

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.

China Custom Wheel/Thin Section/Auto Wheelengine/Auto/Square Bore/Needle Roller/Thrust Ball/Roller/ Taper Roller/Forklift Truck/Hybrid Ceramic Ball Bearing 7309   bearing airChina Custom Wheel/Thin Section/Auto Wheelengine/Auto/Square Bore/Needle Roller/Thrust Ball/Roller/ Taper Roller/Forklift Truck/Hybrid Ceramic Ball Bearing 7309   bearing air
editor by CX 2024-03-30