3309 A-2RS1
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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3309 A-2RS1 Bearing Product Overview & Core Advantages
The 3309 A-2RS1 is a double row angular contact ball bearing engineered for applications demanding high precision and reliable performance under combined loads. Its compact design integrates two rows of balls, enabling it to simultaneously support substantial radial loads and bidirectional axial loads. Manufactured to a P6 (ABEC-3) tolerance class, this sealed bearing offers exceptional running accuracy and is pre-lubricated for long-term, maintenance-free operation, making it ideal for high-rigidity and high-reliability installations.
3309 A-2RS1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 3309 | Basic Bearing Number | Defines the standard metric dimensions: 45mm bore, 100mm OD, 39.7mm width. |
| A- | Contact Angle Designation | Indicates a specific, optimized contact angle (typically 30°) for superior axial load capacity. |
| 2RS1 | Sealing System | Signifies the inclusion of two NBR rubber seals (RS1 type) on both sides, providing excellent protection against contaminants and retaining lubricant. |
3309 A-2RS1 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides a significantly wider effective load spread than single row bearings, resulting in exceptional rigidity and the ability to handle heavy combined radial and axial loads from both directions without the need for complex bearing arrangements.
- Sealed & Lubricated for Life: The integral 2RS1 rubber seals effectively shield the internal components from dust, moisture, and other pollutants. Combined with factory-applied high-quality grease, this creates a maintenance-free solution, reducing downtime and total cost of ownership.
- Precision & Speed Performance: Built to P6 tolerance with a stainless steel cage, the bearing ensures smooth, quiet, and precise operation. This construction, along with optimized internal geometry, supports a high limiting speed of 4,800 rpm for demanding applications.
- Durable Material Construction: The use of chrome steel for rings and balls, coupled with a corrosion-resistant stainless steel cage, ensures high durability, long service life, and consistent performance across the specified temperature range of -30°C to 110°C.
3309 A-2RS1 Bearing Typical Application Areas
The 3309 A-2RS1 is ideally suited for a wide range of industrial machinery and equipment where precision, reliability, and handling of combined loads are critical. Key sectors include:
- Industrial Gearboxes and Transmissions
- Pumps and Compressors
- Material Handling Conveyors
- Agricultural Machinery
- Electric Motors and Generators (as non-locating end bearings)
