3311 A
Double Row Angular Contact Ball Bearings
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Performance
Materials
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3311 A Bearing Product Overview & Core Advantages
The 3311 A is a double row angular contact ball bearing engineered for applications demanding high precision and robust performance. This precision bearing is designed to accommodate combined loads—simultaneously handling significant radial loads and axial loads in both directions. Its double row construction provides exceptional high rigidity, making it ideal for arrangements requiring stable and accurate shaft guidance. Manufactured to a P6 (ABEC-3) tolerance class and pre-lubricated, it offers reliable operation in high-performance industrial environments.
3311 A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 3311 | Standard bore diameter, outside diameter, and width dimensions. |
| A | Denotes a 30° contact angle, optimized for carrying higher axial loads. |
| Open (Seal type) | No integral seals, allowing for higher speeds and custom lubrication schemes. |
3311 A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design significantly increases the bearing's moment stiffness and load-carrying capacity compared to single row designs. It is exceptionally capable of handling combined radial and axial loads from both directions, providing stable support for rotating shafts.
Precision & Speed: Built to a P6 tolerance class, this bearing ensures precise running accuracy and low vibration. The stainless steel cage contributes to smooth operation at the specified limiting speed of 5,300 rpm, even under substantial loads.
Material & Durability: Components made from chrome steel (rings and balls) offer high fatigue life and wear resistance. The bearing is pre-lubricated for immediate use and operates effectively within a temperature range of -30°C to 110°C.
3311 A Bearing Typical Application Areas
Due to its high rigidity and ability to manage combined loads, the 3311 A bearing is ideally suited for a range of demanding industrial applications, including:
- Machine Tool Spindles
- Industrial Gearboxes
- Pumps and Compressors
- Material Handling Equipment
- Precision Agricultural Machinery
