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| Bore (d) | 30 mm |
|---|---|
|
Outer (D) |
47 mm |
| Width (B) | 9 mm |
| Weight (g) | 45 g |
| Dynamic(C) | 570 kgf |
| Static(Co) | 430 kgf |
1.E-Bike Bearings - Introduction to 6906 Bearings
2.Where will we see the 6906 bearings
An Overview
The 6906 thin section bearing is a common bearing model, widely used in industries such as bicycles, electric bicycles, motors, power transmission systems, and industrial machinery. In this article, we will delve into the dimensions of the 6906 bearings.
| Bore (d) | 30 mm |
|---|---|
|
Outer (D) |
47 mm |
| Width (B) | 9 mm |
| Weight (g) | 45 g |
| Dynamic(C) | 570 kgf |
| Static(Co) | 430 kgf |
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Inner diameter of the 6906 bearings
The inner diameter of the 6906 bearing is 30 millimeters. It can accommodate shafts with a diameter of 30 millimeters.
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Outer diameter of the 6906 bearings
The outer diameter of the 6906 bearing is 47 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 6906 bearings.
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Width diameter of the 6906 bearings
The width of the 6906 bearing is 9 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.
6906 Detailed Dimension Information 
The 6906 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 6906 bearings for your application to ensure good performance and reliability.
The 6906 bearing is typically composed of an inner ring, an outer ring, ball bearings, and a cage (also known as a retainer). The groove on the raceway is slightly larger than the radius of the steel balls. As the balls and raceway make point contact, the bearing can withstand both bi-directional axial loads and radial loads. It is commonly used in pairs under normal circumstances to reduce the internal axial forces caused by the load and to handle radial loads.
The sealing covers for the 6906 bearing mainly come in three types: ZZ, 2RS, and OPEN.
The 6906 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 6906 OPEN type bearing is more suitable for applications in clean environments or where regular cleaning is required.
6906 ZZ refers to the 6906 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.
6906 2RS refers to the 6906 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.
The 6906 bearing is also widely used in various industrial equipment, including pumps, gearboxes, and compressors, among others. They support rotating shafts and enable smooth operation of the equipment while reducing friction losses and improving production efficiency.
The 6906 bearing is a widely used thin section bearing in electric bicycles. This bearing has an inner diameter of 30 millimeters, an outer diameter of 47 millimeters, and a thickness of 9 millimeters, making it suitable for handling the loads generated by the bottom bracket of electric bicycles during riding. Its low friction and low noise contribute to enhancing the overall performance and efficiency of electric bicycles. This reliable bearing is crucial for ensuring the smooth operation of electric bicycles.
The 6906 bearing is a key component widely used in multiple industries. From the bicycle and electric bicycle industry to industrial machinery, this bearing plays an indispensable role in many critical equipment. Its high-speed operation, durability, and reliability make it the preferred choice in these industries.
Further reading:
Electric Bicycle Bearings: 6805 Bearing Dimensions
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