3207 A-2ZTN9/MT33
Double Row Angular Contact Ball Bearings
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3207 A-2ZTN9/MT33 Bearing Product Overview & Core Advantages
The 3207 A-2ZTN9/MT33 is a metric double row angular contact ball bearing engineered for applications demanding high precision and reliability. Its primary advantage lies in its ability to simultaneously support substantial combined loads—both radial and bidirectional axial loads—within a compact design envelope. Featuring shielded seals and factory-pre-lubrication, this bearing offers robust performance, high rigidity, and is optimized for high-speed operation, making it an ideal component for precision machinery and industrial systems.
3207 A-2ZTN9/MT33 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 3207 | Basic Bearing Series & Size | Denotes a double row angular contact ball bearing with 35mm bore, 72mm OD, and 27mm width. |
| A | Contact Angle Designation | Specifies a standard 30° contact angle, optimized for carrying significant axial loads. |
| 2Z | Shielded on Both Sides | Provides effective protection against contaminants while allowing for high-speed performance. |
| TN9 | Polyamide (Nylon) Cage, Glass Fiber Reinforced | Lightweight cage design that reduces centrifugal forces, enabling smoother operation at limiting speeds up to 9,000 rpm. |
| MT33 | High-Performance Grease | Factory-applied premium grease ensuring optimal lubrication across the specified temperature range (-30°C to 110°C). |
3207 A-2ZTN9/MT33 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design and robust construction provide exceptional stiffness, enabling stable support for combined loads (Radial Dynamic: 9112 lbf, Static: 6750 lbf). This makes the bearing highly resistant to deformation under complex loading conditions.
Optimized High-Speed Performance: The combination of the lightweight TN9 polyamide cage and effective shielded sealing minimizes friction and heat generation, allowing the bearing to reliably achieve its limiting speed of 9,000 rpm.
Long-Term, Maintenance-Free Operation: With non-contact shields (2Z) on both sides and a pre-filled charge of MT33 grease, the bearing is protected from contamination and is lubricated for life in many applications, reducing the need for maintenance.
Precision Engineering: Manufactured to P6 (ABEC-3) tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, ensuring predictable performance and ease of installation in precision assemblies.
3207 A-2ZTN9/MT33 Bearing Typical Application Areas
The 3207 A-2ZTN9/MT33 is ideally suited for a wide range of industrial machinery and precision equipment, including:
- Machine Tool Spindles and high-precision rotary tables
- Industrial Pumps and compressors
- Gearboxes and transmission systems
- Precision medical and laboratory equipment
- Electric motors and generators requiring high-speed, rigid support
