3204 A-2ZTN9/MT33
Double Row Angular Contact Ball Bearings
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3204 A-2ZTN9/MT33 Bearing Product Overview & Core Advantages
The 3204 A-2ZTN9/MT33 is a double row angular contact ball bearing designed for applications demanding high precision and reliability. This precision bearing excels at simultaneously supporting combined radial and bidirectional axial loads due to its optimized contact angle. Its compact design, featuring a 20 mm bore and 47 mm outside diameter, provides a high load capacity within a minimal envelope. Manufactured to a P6 (ABEC-3) tolerance class, it ensures smooth operation and is pre-lubricated for long-term performance, making it an ideal solution for high-rigidity and high-speed applications.
3204 A-2ZTN9/MT33 Bearing Model Code Explained, Specifications & Naming Convention
The model number 3204 A-2ZTN9/MT33 provides a detailed technical specification:
- 3204: Basic bearing designation indicating a double row angular contact ball bearing with a 20 mm bore and 47 mm outside diameter.
- A: Denotes a specific contact angle (typically 30°), optimized for supporting significant axial loads.
- 2Z: Signifies that the bearing is shielded on both sides. These non-contact steel shields protect against contaminant ingress while minimizing friction, contributing to the high limiting speed.
- TN9: Indicates the cage (retainer) is made of fiberglass reinforced polyamide (PA66). This cage material is lightweight, promotes quiet operation, and is excellent for high-speed applications.
- MT33: Specifies the type of high-performance grease pre-packed into the bearing. This grease is formulated for a wide temperature range (-30° to 110 °C) and offers long-term lubrication, enabling a maintenance-free service life.
3204 A-2ZTN9/MT33 Bearing Structural Features & Performance Benefits
The design of the 3204 A-2ZTN9/MT33 translates directly into superior operational performance:
- High Rigidity: The double row ball construction provides a rigid support system, significantly reducing deflection under combined loads and enhancing positional accuracy in machinery.
- Superior Load Capacity: Engineered to handle substantial radial and bidirectional axial loads simultaneously, making it suitable for complex loading conditions.
- Optimized High-Speed Performance: The combination of the low-friction TN9 polymer cage and optimized internal geometry allows for a high limiting speed of 14,000 rpm, which is critical for demanding applications.
- Maintenance-Free Longevity: With shields (2Z) protecting against contaminants and a long-life MT33 grease pre-lubrication, the bearing is sealed for life, reducing the need for re-lubrication and lowering total cost of ownership.
3204 A-2ZTN9/MT33 Bearing Typical Application Areas
This versatile double row angular contact ball bearing is specified in a wide range of precision industries and equipment, including:
- Machine Tool Spindles
- High-Speed Industrial Pumps and Compressors
- Precision Gearboxes
- Material Handling Systems
- Medical and Laboratory Equipment
