6304 ETN9/C3
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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Materials
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6304 ETN9/C3 Bearing Product Overview & Core Advantages
The 6304 ETN9/C3 is a single row deep groove ball bearing engineered for high-performance applications requiring precision and reliability. This metric bearing features an open design without seals, allowing for optimal lubrication management in controlled environments. Its C3 radial internal clearance provides superior performance in applications with thermal expansion or where interference fits are used. Manufactured to ABEC 1 | ISO P0 tolerance standards, this bearing delivers consistent operation and is ideal for handling significant radial loads while maintaining excellent limiting speed capabilities up to 19,000 rpm.
Model Code Detailed Explanation
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 63 | Medium series deep groove ball bearing | Balanced load capacity and dimensional proportions |
| 04 | Bore diameter: 20 mm | Standard shaft size compatibility |
| E | Reinforced design | Increased load capacity through optimized internal geometry |
| TN9 | Nylon cage, glass fiber reinforced | Reduced friction, excellent high-speed performance |
| C3 | Greater than normal radial internal clearance | Accommodates thermal expansion and interference fits |
6304 ETN9/C3 Bearing Structural Features & Performance Benefits
Optimized Internal Geometry: The reinforced "E" design incorporates larger balls and optimized raceway geometry, significantly increasing the radial dynamic load rating to 4092 lbf while maintaining compact dimensions of 20×52×15 mm.
High-Speed Nylon Cage: The TN9 glass fiber reinforced nylon cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling the bearing to achieve its maximum limiting speed of 19,000 rpm with minimal friction and heat generation.
Enhanced Clearance for Demanding Applications: The C3 radial internal clearance ensures reliable operation in applications subject to thermal expansion, heavy loads, or where interference fits are required, preventing premature failure due to excessive preload.
Precision Manufacturing: Manufactured to ABEC 1 | ISO P0 tolerance standards with tight dimensional control (bore tolerance: -0.008mm to 0), ensuring consistent performance and easy installation in precision machinery.
6304 ETN9/C3 Bearing Typical Application Areas
Electric Motors & Generators: Ideal for main shaft applications in industrial motors requiring high-speed operation and reliable radial load support.
Industrial Gearboxes: Suitable for power transmission systems where the C3 clearance accommodates thermal expansion under varying operational conditions.
Material Handling Equipment: Used in conveyor systems, pulleys, and rollers where consistent performance under radial loads is essential.
Agricultural Machinery: Applied in implement drives and PTO shafts where the reinforced design handles shock loads and varying operational temperatures.
Industrial Fans & Blowers: Perfect for high-speed fan shafts requiring precision balance and reliable operation at elevated speeds.
