3303 A-2Z
Double Row Angular Contact Ball Bearings
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Part No.
Part No.
3303 A-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
0.18 kg
Tolerance class
P6 (ABEC-3)
Seal type
Shielded
For load direction
Angular Contact
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.009mm to 0
Width
22.2 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
1 mm
Distance from side face to load point
28 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4860 lbf
Radial static load rating
2858 lbf
Limiting speed
14 X 1000 rpm
Lubrication
Lubricated
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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3303 A-2Z Bearing Product Overview & Core Advantages
The 3303 A-2Z is a metric double row angular contact ball bearing engineered for applications requiring high precision and reliability. Its double row design provides superior rigidity and enables it to support combined loads—significant radial loads and bidirectional axial loads—simultaneously. The inclusion of shields (2Z) and factory-applied lubrication ensures long-term, maintenance-free operation, making it an ideal choice for compact, high-performance assemblies demanding consistent performance under demanding conditions.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 3303 | Standard bearing series designation, indicating the basic dimensions (17mm bore, 47mm OD). |
| A | Signifies a 30° contact angle, optimized for carrying higher axial loads. |
| 2Z | Denotes non-contact shields on both sides. This provides effective protection against contaminants while minimizing friction, contributing to the bearing's high limiting speed. |
3303 A-2Z Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row ball complement and angular contact design create a robust structure capable of handling high radial dynamic load ratings (4860 lbf) and static load ratings (2858 lbf), as well as substantial bidirectional axial forces.
- Precision & Speed: Manufactured to a P6 (ABEC-3) tolerance class, this bearing ensures smooth, quiet, and precise operation. The stainless steel cage and optimized internal geometry support a high limiting speed of 14,000 rpm.
- Durability & Maintenance-Free Operation: Constructed from chrome steel rings and balls for extended service life. The 2Z shields retain the factory-applied grease, protecting the bearing from contamination and providing reliable, long-term lubrication within the specified temperature range of -30°C to 110°C.
3303 A-2Z Bearing Typical Application Areas
This bearing is ideally suited for a wide range of industrial machinery and precision equipment, including:
- Precision spindles and machine tool accessories
- High-speed pumps and compressors
- Industrial gearboxes and transmission systems
- Medical and laboratory equipment
- Small electric motors and encoders
