4303 ATN9
Double Row Deep Groove Ball Bearings
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Part No.
Part No.
4303 ATN9
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
160 g
Tolerance class
ABEC-1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.011mm to 0
Width
19 mm
Width tolerance
-0.120mm to 0
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4388 lbf
Radial static load rating
2970 lbf
Limiting speed
24 X 1000 rpm
Lubrication
None
Radial internal clearance
C0
Radial internal clearance
0.003mm to 0.018mm
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Nylon
Environment & Compliance
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 11.35
/ each
In Stock
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4303 ATN9 Bearing Product Overview & Core Advantages
The 4303 ATN9 is a double row angular contact ball bearing designed for applications requiring high rigidity and reliable performance. This precision bearing excels at handling significant combined loads, supporting both radial forces and bidirectional axial loads simultaneously. Its compact design, featuring a 17 mm bore and 47 mm outside diameter, makes it ideal for space-constrained, high-reliability machinery. Manufactured with chrome steel rings and balls, it offers excellent durability and a long service life.
4303 ATN9 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 4303 | Basic bearing designation indicating the bearing size (17mm bore, 47mm OD, 19mm width). |
| A | Signifies a 30-degree contact angle, optimized for carrying substantial axial loads. |
| TN9 | Indicates a glass fiber reinforced nylon cage. This design is lightweight and ideal for high-speed operation, contributing to lower friction and higher limiting speeds. |
4303 ATN9 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior rigidity and enables the bearing to handle heavy combined loads (radial and bidirectional axial) effectively, making it more robust than single-row designs.
- High-Speed Performance: The lightweight and robust TN9 nylon cage minimizes centrifugal forces, reduces friction, and ensures stable operation, allowing for a high limiting speed of 24,000 rpm.
- Precision & Reliability: Manufactured to ABEC-1 tolerance standards with a C0 radial internal clearance (0.003mm to 0.018mm), this bearing delivers consistent and precise performance for a wide range of industrial applications.
- Material Quality: Constructed from high-grade chrome steel for both rings and balls, ensuring high fatigue resistance and operational longevity.
4303 ATN9 Bearing Typical Application Areas
This bearing is ideally suited for demanding applications where high rigidity and speed are critical. Key sectors include:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Pumps and Compressors
- Material Handling Equipment
- Industrial Fans and Blowers
