4304 ATN9 Double Row Deep Groove Ball Bearing
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Request Quote| Part Number | 4304 ATN9 |
| Category | Double Row Deep Groove Ball Bearings |
| Brand | JMP® |
| Interchangeable With | INA, NTN, HRB |
| Bore Diameter | 20.0000 mm |
| Outer Diameter | 52.0000 mm |
| Width | 21.0000 mm |
| Bore Tolerance | -0.01mm to 0 |
| Outer Tolerance | -0.013mm to 0 |
| Width Tolerance | -0.120mm to 0 |
| Chamfer Dimension | 1.00 mm |
| Dynamic Radial Load | 5,265 lbf |
| Static Radial Load | 3,600 lbf |
| Construction | Double Row |
| Seal Type | Open |
| Bearing Type | Ball |
| Load Direction | Radial |
| System of Measurement | Metric |
| Ring Material | Chrome Steel |
| Ball / Roller Material | Chrome Steel |
| Cage Material | Nylon |
| Reference Speed | 22,000 rpm |
| Limiting Speed (Grease) | 22,000 rpm |
| Limiting Speed (Oil) | — |
| Radial Clearance | C0 |
| Tolerance Class | ABEC-1 |
| Bore Tolerance | -0.01mm to 0 |
| Outer Ring Tolerance | -0.013mm to 0 |
| Width Tolerance | -0.120mm to 0 |
| Temperature Range | -30° to 110 °C |
| RoHS | Compliant |
| Weight | 210.0000 g |
| Brand | Equivalent |
|---|---|
| INA | 4304 ATN9 |
| NTN | 4304 ATN9 |
| HRB | 4304 ATN9 |
The 4304 ATN9 is a high-quality Double Row Deep Groove Ball Bearing with bore diameter of 20.0000 mm, outer diameter of 52.0000 mm, and width of 21.0000 mm. This double row design provides enhanced load capacity and rigidity.
With a dynamic radial load rating of 5,265 lbf and static load rating of 3,600 lbf, the 4304 ATN9 is engineered to handle demanding operating conditions. It supports speeds up to 22,000 rpm, making it suitable for high-speed applications.
- High load-carrying capacity (5,265 lbf dynamic) for extended service life
- High-speed capability up to 22,000 rpm for versatile operation
- Open design for easy relubrication and low friction operation
- Double row construction for enhanced rigidity and load distribution
- Fully interchangeable with major international brands (SKF, NSK, FAG, NTN)
The 4304 ATN9 is available in Open (no seal), ZZ (metal shield), and 2RS (rubber seal) configurations. Open bearings offer higher speed ratings and lower friction, while sealed versions provide better contamination protection and reduced maintenance requirements.
JMP Bearings manufactures the 4304 ATN9 in various tolerance classes including ABEC-1 (standard), ABEC-3, ABEC-5 (precision), and ABEC-7 (high precision). Please contact us for specific tolerance class availability and pricing.
The 4304 ATN9 typically uses lithium-based grease (e.g., ISO VG 68) for general applications. For high-temperature or high-speed applications, synthetic greases such as polyurea-based lubricants are recommended. Contact our engineering team for application-specific lubrication guidance.
JMP Bearings offers flexible ordering - sample quantities are available from 1 piece. For bulk orders, we provide tiered pricing starting at 100, 500, and 1000+ pieces. Contact us for a custom quote tailored to your volume.
For standard 4304 ATN9 applications, shaft tolerance is typically k5 or j6, and housing tolerance is typically H7 or J6. Exact tolerance selections depend on load conditions, speed, and operating temperature. Refer to ISO 286 or consult our engineering support for detailed recommendations.
