Product Description
Product Discription
STRUCTURE | |
PRODUCT DETAILS | |
Bearing Model | 6906 61906 |
Closures | Open/ZZ/2RS/Z/RS available |
Dimensions | 30mmx47mmx9mm |
Bore Diameter/Inner Ring Diameter | 30mm |
Outer Ring Diameter | 47mm |
Width/Hight | 9MM |
Precision Level | P0 P6 P5 P4/ABEC-1 ABEC-3 ANEC-5 ABEC-7 available |
MATERIALS | |
Inner Ring/Outer Ring/Ball Material | Chrome Steel/Bearing Steel/Gcr15/AISI52100 |
Closures Material | shield by steel, sealed by rubber seals |
Features
- Combined Radial and Axial Loads
- Simple Structure + High Precision + Low Cost + Widely Used
Deep groove ball bearings have simple structure and are easy to achieve higher manufacturing accuracy compared with other types, so they are easy to be produced in series and have lower manufacturing cost. Therefore, they are widely used.
- Different Structures: Open + ZZ + Z + 2RS + RS; Single Row + Double Row; With/ Without Snap Ring
- High Speed Rotation/ Extremely High Speed Rotation + Long Service Life
- Large Dimension Scope
It is widely used in precision instruments, low noise motors, automobiles, motorcycles and general machinery industries. It is a kind of bearing widely used in the machinery industry.
Applications
Applications | |
Car rear wheel | Railway vehicle |
Automobile gearbox | Construction machinery |
Automotive electrical installation | The loading machinery |
Universal motor | Agricultural machingery |
The internal combustion engine | Industrial machinery |
Household appliances | Instrument |
Manufacture Processes
In the factory testing laboratories, various bearing parts are examined in detail. The factory has its own professional bearing life tester, after bearing life and durability test, our bearings have the advantages of long service life, and high durability. We are keeping an introduction of the latest measurement and testing equipment. Quality procedures are based on extensive, repeatedly carried out product tests – both before inclusion in the range and after.
We strictly follow the core of quality management process control:
01 Heat Treatment 02 Centerless Grinding Machine 11200 (most advanced) 03 Automatic Production Lines for Raceway 04 Automatic Production Lines for Raceway 05 Ultras onic Cleaning of Rings 06 Automatic Assembly 07 Ultras onic Cleaning of Bearings 08 Automatic Greasing, Seals Pressing 09 Measurement of Bearing Vibration (Acceleration) 10 Measurement of Bearing Vibration (Speed) 11 Laser Marking 12 Automatic Packing |
✓ APQP: product quality advance plHangZhou ✓ SPC: Statistical process control ✓ MSA: Measurement system analysis ✓ FMEA: Analysis of potential failure modes and consequences ✓ PPAP: Production part approval procedure |
Product Catelog
Production Catelog | |||||||||
Bearing No. | dxDxB (mm) | Weight(kg) | Designation | ||||||
6900 | 10 | 22 | 6 | 0.0090 | 6900 Z | 6900 ZZ | 6900 RS | 6900 2RS | |
6901 | 12 | 24 | 6 | 0.0110 | 6901 Z | 6901 ZZ | 6901 RS | 6901 2RS | |
6902 | 15 | 28 | 7 | 0.0160 | 6902 Z | 6902 ZZ | 6902 RS | 6902 2RS | |
6903 | 17 | 30 | 7 | 0.0180 | 6903 Z | 6903 ZZ | 6903 RS | 6903 2RS | |
6904 | 20 | 37 | 9 | 0.0360 | 6904 Z | 6904 ZZ | 6904 RS | 6904 2RS | |
6905 | 25 | 42 | 9 | 0.0420 | 6905 Z | 6905 ZZ | 6905 RS | 6905 2RS | |
6906 | 30 | 47 | 9 | 0.0480 | 6906 Z | 6906 ZZ | 6906 RS | 6906 2RS | |
6907 | 35 | 55 | 10 | 0.0740 | 6907 Z | 6907 ZZ | 6907 RS | 6907 2RS | |
6908 | 40 | 62 | 12 | 0.1100 | 6908 Z | 6908 ZZ | 6908 RS | 6908 2RS | |
6909 | 45 | 68 | 12 | 0.1280 | 6909 Z | 6909 ZZ | 6909 RS | 6909 2RS | |
6910 | 50 | 72 | 12 | 0.1300 | 6910 Z | 6910 ZZ | 6910 RS | 6910 2RS | |
6912 | 60 | 85 | 13 | 0.2000 | 6912 Z | 6912 ZZ | 6912 RS | 6912 2RS | |
6913 | 65 | 90 | 13 | 0.2200 | 6913 Z | 6913 ZZ | 6913 RS | 6913 2RS | |
6914 | 70 | 110 | 16 | 0.350 | 6914 Z | 6914 ZZ | 6914 RS | 6914 2RS | |
6915 | 75 | 105 | 16 | 0.3800 | 6915 Z | 6915 ZZ | 6915 RS | 6915 2RS |
Bearing Material | ||||
Bearing Material | Chinese Standard | Equivalent | ||
Material | AISI/SAE/ASTM | DIN | JIS | |
chrome steel | Gcr15 | SA52100 | 100Cr6 | SUJ2 |
stainless steel | 9cr18 | AISI400C | X102CrMo17 | SUS440C |
cold rolled low carbon | ST14 | ASTM366 | 1623 | 3141 |
Xihu (West Lake) Dis. for Selection of Bearing Precision | ||||
Application | ISO | |||
Computer printers, copy machine-feed rollers, micro motors, stepping motors, fan motors, VCR pinch rollers | Normal Class 6 | |||
High precision motors, hard disk drive motors, dental spindles, servo motors, encoders, VCR drum spindles, VCR capstan motors, polygonal mirror scanner motors |
Class 5 Class 4 |
|||
High frequency spindles, gyro motors, gyro gimbals | Class 4 |
Shipping and Packing
Packing&Shipping | ||
Packing | small size& medium size |
plastic buckets/paper-10pcs |
wrapped with rust-proof paper-10pcs | ||
color box-1pcs | ||
large size | wrapped with waterproof winding tape | |
wooden box | ||
Pallet | European CZPT pallet | |
Colesed CZPT wooden pallet | ||
ISB three-folds pallet | ||
Shipping | Port of shipment | ZheJiang , China |
Transportation | Sea/ Air/ Road | |
Price Term | FOB(Usual) | |
Payment Term | 30% prepayment upone order confirmed, balance T/T before shipment when goods ready. |
Factory warranted | -Granville can offers an array of tools for efficientofferthey maintenance. -We also offer reliability systems and services to help maintenance. -Personnel maximize operating performance and detect equipment. -Dealing with problems before they become critical. |
Inquiry
{Hi! This is Stacy from Granville, let me know if you have any requirements for our products or services. Have a nice day! 🙂
RFQ FOR FREE | ||
List | From | To |
Company Name | Granville | |
Name: Mr./Mrs./Miss | Miss Stacy [Export Department] | |
Bearing No. | ||
Quantity | ||
More Details |
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Aligning: | Non-Aligning Bearing |
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Separated: | Unseparated |
Rows Number: | Single |
Samples: |
US$ 0/Set
1 Set(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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Can you describe the load-carrying capacity and load ratings of radial bearings?
The load-carrying capacity and load ratings of radial bearings are crucial factors to consider when selecting and designing bearing systems for industrial applications. Here is a detailed description of these aspects:
Load-Carrying Capacity:
The load-carrying capacity of a radial bearing refers to its ability to support and distribute loads without excessive deformation or failure. It is a measure of the maximum load that a bearing can handle under specific operating conditions. The load-carrying capacity is influenced by several factors, including the bearing size, design, material, lubrication, operating speed, and temperature.
Radial bearings are designed to primarily support radial loads, which are forces acting perpendicular to the shaft’s axis. These loads can include the weight of rotating components, belt tension, pulley forces, or other radial forces. The load-carrying capacity of a radial bearing is specified for radial loads and is typically provided by the manufacturer in terms of dynamic load rating and static load rating.
Dynamic Load Rating:
The dynamic load rating of a radial bearing indicates the maximum radial load that the bearing can withstand under ideal operating conditions, with a calculated 90% reliability over a specified number of revolutions or operating hours. It represents the load at which the bearing is expected to have a basic rating life of one million revolutions.
The dynamic load rating takes into account factors such as the bearing’s geometry, material properties, and internal design, which affect its ability to distribute the load and resist fatigue failure. It is expressed in units of force (often in Newtons or pounds) and is provided by the bearing manufacturer. When selecting a radial bearing, it is crucial to ensure that the anticipated radial load falls within the dynamic load rating to prevent premature bearing failure.
Static Load Rating:
The static load rating of a radial bearing refers to the maximum radial load that the bearing can withstand without permanent deformation or damage while stationary. Unlike the dynamic load rating, the static load rating does not account for the bearing’s ability to handle fatigue-related failures over a specified number of revolutions but focuses on the load capacity under static conditions.
The static load rating is typically higher than the dynamic load rating due to the absence of rotational forces and associated fatigue effects. It provides an indication of the bearing’s ability to support heavy loads without undergoing permanent deformation. Like the dynamic load rating, the static load rating is expressed in units of force and is provided by the bearing manufacturer. It is crucial to ensure that the static load rating exceeds the anticipated radial load to prevent bearing damage or failure.
Load Rating Calculation:
The load ratings of radial bearings are determined through standardized calculation methods based on industry standards, such as ISO and ANSI/ABMA standards. These calculations consider factors such as the bearing’s geometry, material properties, internal design, and expected operating conditions.
The load ratings are influenced by various factors, including the number and size of the rolling elements, the contact angle, the material strength, and the bearing’s internal clearance. Manufacturers perform extensive testing and analysis to determine the load ratings of their radial bearings and provide the values in their product catalogs to assist engineers and designers in selecting the appropriate bearing for specific applications.
In summary, the load-carrying capacity and load ratings of radial bearings play a critical role in determining their suitability for various industrial applications. The dynamic load rating indicates the maximum radial load that a bearing can handle under ideal operating conditions and a specified reliability level, while the static load rating represents the maximum radial load the bearing can withstand without permanent deformation while stationary. Understanding these load ratings is essential for selecting radial bearings that can reliably and safely support the anticipated loads in industrial machinery and equipment.
Can you provide examples of industries or equipment that frequently use radial bearings?
Yes, radial bearings are widely used in various industries and equipment where rotational motion is involved. They are essential components in many applications that require efficient and reliable operation. Here are some examples of industries and equipment that frequently utilize radial bearings:
1. Automotive Industry:
The automotive industry extensively uses radial bearings in various components such as engines, transmissions, wheel hubs, suspension systems, and electric motors. Radial bearings ensure smooth and reliable rotation in these applications, contributing to the overall performance and durability of vehicles.
2. Industrial Machinery and Equipment:
Radial bearings find extensive use in a wide range of industrial machinery and equipment. This includes pumps, compressors, fans, motors, conveyors, machine tools, printing presses, textile machinery, and packaging equipment. Radial bearings in these applications support rotational motion, reduce friction, and ensure precise operation, thereby enhancing productivity and reliability.
3. Aerospace Industry:
In the aerospace industry, radial bearings are vital for various applications, including aircraft engines, landing gear, control systems, and helicopter rotor systems. These bearings provide critical support for rotational motion under demanding conditions, such as high speeds, extreme temperatures, and heavy loads.
4. Power Generation:
Power generation facilities, such as thermal power plants, hydroelectric plants, and wind turbines, rely on radial bearings in turbines, generators, and other rotating machinery. Radial bearings ensure smooth rotation and efficient power generation by minimizing friction and supporting heavy loads in these critical energy production systems.
5. Heavy Equipment and Construction:
In the heavy equipment and construction industry, radial bearings are used in equipment like excavators, cranes, loaders, bulldozers, and concrete mixers. These bearings enable smooth operation and support the heavy loads encountered during construction and earthmoving activities.
6. Mining and Quarrying:
In mining and quarrying operations, radial bearings are employed in machinery such as crushers, screens, mills, and conveyors. These bearings withstand harsh conditions, heavy loads, and high speeds, ensuring reliable performance in demanding environments.
7. Railway and Transportation:
Radial bearings play a crucial role in the railway and transportation industry. They are used in applications such as locomotives, passenger trains, freight trains, tramways, and metro systems. These bearings support the rotational motion of wheels, axles, and drive systems, ensuring safe and efficient transportation.
8. Medical and Scientific Equipment:
Radial bearings are utilized in various medical and scientific equipment, including centrifuges, laboratory instruments, imaging devices, and precision equipment. These bearings provide smooth rotation, accuracy, and stability required for critical research, diagnostics, and medical procedures.
9. Marine and Offshore Industry:
Radial bearings are used in marine and offshore applications, such as ship propulsion systems, marine winches, rudders, and offshore drilling equipment. These bearings withstand corrosive environments, high loads, and challenging operating conditions encountered in marine and offshore operations.
10. Renewable Energy:
In the renewable energy sector, radial bearings are employed in wind turbines, solar tracking systems, and tidal energy converters. These bearings support the rotation of turbine blades, solar panels, and other components, ensuring efficient energy generation from renewable sources.
These examples highlight the broad range of industries and equipment that frequently rely on radial bearings. The versatility, reliability, and performance of radial bearings make them indispensable components in numerous applications where rotational motion is essential.
Can you describe the various types of seals and shields used with radial bearings for contamination prevention?
Seals and shields are commonly used with radial bearings to prevent contamination and protect the bearing internals from external particles, moisture, and other contaminants. They help maintain the integrity of the lubricant and extend the service life of the bearing. Here’s a detailed description of the various types of seals and shields used with radial bearings:
1. Contact Seals:
Contact seals, also known as lip seals or radial lip seals, are designed to make direct contact with the inner ring of the bearing. They consist of a flexible sealing lip that forms a barrier between the inner and outer ring of the bearing. Contact seals effectively prevent the entry of contaminants into the bearing by creating a tight seal. They are commonly made of rubber or elastomeric materials and provide effective sealing against solid particles, liquids, and gases. Contact seals offer good contamination prevention but may generate higher friction and heat compared to non-contact seals.
2. Non-Contact Seals:
Non-contact seals, also known as labyrinth seals or gap seals, do not make direct contact with the inner ring of the bearing. Instead, they rely on a series of barriers or labyrinth-like structures to create a tortuous path that prevents the entry of contaminants. Non-contact seals provide effective protection against solid particles, such as dust and dirt, while allowing for minimal friction and heat generation. They are commonly made of metal or plastic and are suitable for high-speed applications where reduced friction is critical.
3. Shielded Bearings:
Shielded bearings, also known as metal shields or ZZ bearings, are equipped with metallic shields that cover the outer surface of the bearing. These shields are usually made of steel and provide a physical barrier against contaminants. Shielded bearings are designed to prevent the entry of larger particles, such as dirt and debris, while allowing for the circulation of lubricating grease within the bearing. However, they do not provide a complete seal and may not be suitable for applications where protection against moisture or fine particles is required.
4. Rubber Seals:
Rubber seals, also known as rubber contact seals or RS bearings, are similar to contact seals but are made entirely of rubber or elastomeric materials. They provide effective sealing against contaminants, including solid particles, liquids, and gases. Rubber seals offer good contamination prevention and are more flexible than other sealing options, allowing for better adaptability to varying operating conditions. They are commonly used in applications where protection against moisture, dust, and other fine particles is essential.
5. Felt Seals:
Felt seals are made of compressed or woven felt material and are used primarily in low-speed applications. They provide a barrier against larger particles and help retain lubricating oil or grease within the bearing. Felt seals are relatively simple and cost-effective solutions for contamination prevention. However, they may not offer the same level of protection as other sealing options and may require regular lubrication to maintain their effectiveness.
6. Combination Seals:
Combination seals utilize a combination of different sealing mechanisms to provide enhanced contamination prevention. These seals often incorporate both contact and non-contact elements to create an effective barrier against various contaminants. Combination seals are designed to address specific application requirements, providing a balance between sealing effectiveness, friction, heat generation, and other performance factors.
7. Additional Features:
Some seals and shields may incorporate additional features to enhance contamination prevention. For example, seals may include dust lips or auxiliary lips to provide extra protection against fine particles. Shields may have gap fillers or flingers to deflect contaminants away from the bearing. These additional features help improve the sealing effectiveness and contribute to extended bearing life.
When selecting seals and shields for radial bearings, it is essential to consider the specific application requirements, operating conditions, and the level of contamination protection needed. Manufacturers typically provide guidelines and recommendations regarding the appropriate sealing options for their bearings to ensure optimal performance and reliability.
editor by CX 2024-04-25