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| Bore (d) | 20 mm |
|---|---|
| Outer (D) | 32 mm |
| Width (B) | 7 mm |
| Weight (g) | 18 g |
| Dynamic(C) | 273 kgf |
| Static(Co) | 191 kgf |
Table of content
1. E-Bike Bearings - Introduction to 6804 Bearings
2. Where will we see the 6804 bearings
3. Other Electric Bicycle Bearing Charts (including 6804 bearing dimensions)
The 6804 bearing is a common bearing model widely used in industries such as bicycles, electric bicycles (hubs), automobiles, and household appliances. It belongs to the most extensively used category of bearings in the mechanical industry. In this article, we will delve into the dimensions of the 6804 bearing.
| Bore (d) | 20 mm |
|---|---|
| Outer (D) | 32 mm |
| Width (B) | 7 mm |
| Weight (g) | 18 g |
| Dynamic(C) | 273 kgf |
| Static(Co) | 191 kgf |
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A. Inner diameter of the 6804 bearings
The inner diameter of the 6804 bearing is 20 millimeters. It can accommodate shafts with a diameter of 20 millimeters.
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B. Outer diameter of the 6804 bearings
The outer diameter of the 6804 bearing is 32 millimeters. This refers to the diameter of the outer ring of the bearing. Make sure that your application space can accommodate the outer diameter of the 6804 bearings.
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C. Width diameter of the 6804 bearings
The width of the 6804 bearing is 7 millimeters. This refers to the distance between the inner and outer rings of the bearing. Ensure that this dimension is suitable for your application to ensure proper installation and operation.
6804-2RS Detailed Dimension Information 
The 6804 bearing is a common and widely used bearing model. Understanding its inner diameter, outer diameter, and width dimensions is crucial for selecting the appropriate bearing. Based on your application requirements, load, speed, temperature, and quality criteria, choose the suitable size of the 6804 bearings for your application to ensure good performance and reliability.
Need Assistance Selecting The Proper Ball Bearings?
If you need help selecting the best products for your specific industry application, ISK BEARINGS offers application support as part of our value-added services to make your job easier.
Inner and Outer Rings: The 6804 thin section bearing consists of inner and outer rings, which are the primary bearing rings. These rings are typically made from chrome steel material (material can be chosen based on requirements) and undergo precise machining and heat treatment to ensure their hardness and durability.
Steel Balls: The steel balls within the bearing are also usually made from chrome steel material (material can be chosen based on requirements). These balls are evenly distributed between the inner and outer rings, reducing friction through rolling motion and supporting axial and radial loads.
Cage: The cage is the component that supports the steel balls. It is usually made from plastic or metal and maintains the even distribution of the balls while minimizing collisions and friction between them.
Seals: Some 6804 thin section bearings may come equipped with seals to prevent dust, dirt, and other external objects from entering the bearing interior. This helps protect the lubricating grease and extends the bearing's lifespan.
The sealing covers for the 6804 bearing mainly come in three types: ZZ, 2RS, and OPEN.
The 6804 OPEN type bearing cover is a design without a cover, allowing the internal components of the bearing to be exposed to the external environment. This design makes the bearing more susceptible to contamination from dirt, dust, and other external particles. Therefore, the 6804 OPEN type bearing is more suitable for applications in clean environments or where regular cleaning is required.
6804 ZZ refers to the 6804 bearing with metal shields as the outer cover. The metal shields effectively block dust, contaminants, and other external particles from entering while retaining the lubricant within the bearing.
6804 2RS refers to the 6804 bearing with rubber seals as the outer cover. The rubber seals provide enhanced protection by effectively blocking moisture, dust, and other contaminants from entering. This sealing method is commonly used in harsh environments and applications that require stricter protection.
When choosing the appropriate bearing outer cover mode for your needs, consider the following factors
Application environment: Determine the potential sources of contamination and other external particles in your application environment. Based on the environmental conditions, choose between open type, metal shields, or rubber seals to provide the appropriate protection.
Precision and speed requirements: Consider the precision and speed requirements of your application. Open type bearings are typically suitable for low precision and lower speed applications, while metal shields and rubber seals offer higher protection and are suitable for medium and high precision requirements.
Maintenance requirements: Consider your maintenance needs for the bearings. Open type bearings require regular cleaning and lubrication, while metal shields and rubber seals can reduce maintenance requirements.
In some components of automobiles, such as transmissions and generators, the 6804 bearing is also utilized.
Certain components in household appliances, such as fans, motors, and compressors, can also utilize the 6804 bearing.
The 6804 bearing is a crucial bearing model used in most electric bicycle hubs. This bearing has dimensions of 20mm inner diameter, 32mm outer diameter, and 7mm thickness. Its size design allows it to maintain low friction and high efficiency during high-speed rotation.
The 6804 bearing is a key component widely used in various industries. From the automotive industry to household appliances and the electric bicycle sector, this bearing plays an indispensable role in many critical devices. Its high-speed operation, durability, and reliability make it the preferred choice in these industries.
Why is ISK BEARINGS frequently chosen as the specified bearing brand by major international companies?
Need Assistance Selecting The Proper Ball Bearings?
If you need help selecting the best products for your specific industry application, ISK BEARINGS offers application support as part of our value-added services to make your job easier.
Further reading:
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