3303 A-2ZTN9/MT33
Double Row Angular Contact Ball Bearings
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3303 A-2ZTN9/MT33 Bearing Product Overview & Core Advantages
The 3303 A-2ZTN9/MT33 is a double row angular contact ball bearing engineered for applications demanding high rigidity and precision. This metric bearing is designed to simultaneously handle significant combined loads—both radial and bidirectional axial loads—within a compact envelope. Its construction makes it an ideal choice for high-speed and high-reliability scenarios where space is at a premium and operational stability is critical. The pre-lubricated and shielded design ensures long-term performance with minimal maintenance.
3303 A-2ZTN9/MT33 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 3303 | Basic bearing designation | Defines the standard bearing dimensions: 17mm bore, 47mm OD, 22.2mm width. |
| A | Contact angle designation | Optimized for carrying substantial axial loads. |
| 2Z | Shielded on both sides | Provides effective protection against contaminants while retaining lubricant, enhancing service life. |
| TN9 | Stainless steel cage, pressed window type | Contributes to the bearing's high-speed performance and corrosion resistance. |
| MT33 | High-performance grease | Ensures optimal lubrication for the specified temperature range (-30° to 110 °C), supporting high-speed operation and long-term reliability. |
3303 A-2ZTN9/MT33 Bearing Structural Features & Performance Benefits
The performance of the 3303 A-2ZTN9/MT33 is a direct result of its advanced structural design:
- High Rigidity & Load Capacity: The double row ball complement and angular contact design provide superior high rigidity, enabling the bearing to withstand heavy combined loads and moment loads effectively.
- Optimized High-Speed Performance: The lightweight TN9 stainless steel cage minimizes centrifugal forces, while the MT33 grease is formulated for stable performance at the limiting speed of 14,000 rpm.
- Maintenance-Free Operation: The combination of non-contact shields (2Z) on both sides and a factory-fill of high-quality grease creates a sealed-for-life unit, eliminating the need for re-lubrication in many applications and reducing total cost of ownership.
- Precision & Reliability: Manufactured to a P6 (ABEC-3) tolerance class with chrome steel rings and balls, this precision bearing ensures consistent running accuracy and extended service life.
3303 A-2ZTN9/MT33 Bearing Typical Application Areas
This versatile double row angular contact ball bearing is specified in a wide range of demanding industrial sectors, including:
- Machine Tool Spindles: For high-speed, high-precision machining centers requiring rigidity and accuracy.
- Industrial Pumps & Compressors: To handle combined radial and axial loads in fluid movement systems.
- Precision Gearboxes & Transmissions: Where compact design and reliable performance under load are essential.
- Medical and Laboratory Equipment: For applications demanding quiet operation, high speed, and contamination control.
