3318 A
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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3318 A Bearing Product Overview & Core Advantages
The 3318 A is a double row angular contact ball bearing engineered for applications requiring exceptional rigidity and the ability to handle combined loads. This precision bearing is designed to simultaneously support substantial radial loads and bidirectional axial loads, making it an ideal solution for compact, high-performance machinery. Manufactured to P6 (ABEC-3) tolerance class, it ensures reliable operation and high rotational accuracy. Its robust construction and optimized internal geometry contribute to its high load-carrying capacity and stable performance under demanding conditions.
Model Code In-Depth Analysis
| Model Segment | Technical Meaning |
|---|---|
| 3318 | Standard bore diameter (90 mm), outside diameter (190 mm), and width (73 mm) dimensions. |
| A | Indicates a 30° contact angle, optimized for carrying higher axial loads. |
3318 A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness compared to single row bearings, enabling stable support for shafts under combined loads. With a dynamic load rating of 46,800 lbf and a static load rating of 40,500 lbf, it is built for demanding applications.
Optimized for Precision: The stainless steel cage ensures smooth operation and guides the balls effectively, contributing to the bearing's high limiting speed of 3,400 rpm. The precise bearing dimensions and P6 tolerance class guarantee consistent performance and ease of installation.
Durability & Reliability: Constructed from chrome steel for both rings and balls, the bearing offers excellent wear resistance and a long operational life. The open seal type allows for versatile lubrication options to suit specific operating conditions within a temperature range of -30°C to 110°C.
3318 A Bearing Typical Application Areas
The 3318 A bearing is ideally suited for a wide range of industrial machinery where high rigidity and precision are paramount. Key application areas include:
- Machine Tool Spindles
- Gearboxes and Transmissions
- Industrial Pumps and Compressors
- Material Handling Equipment
- Precision Agricultural Machinery
