7317 BECBJ
Single 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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7317 BECBJ Bearing Product Overview & Core Advantages
The 7317 BECBJ is a single row angular contact ball bearing engineered for high-precision applications requiring superior performance under combined loads. This precision bearing is characterized by its 40° contact angle, which enables it to support significant radial loads and unidirectional axial loads simultaneously. Manufactured to P6 (ABEC-3) tolerance class, it ensures exceptional running accuracy and rotational stability. Its open design, combined with a stainless steel cage, facilitates optimal lubrication flow, making it an ideal choice for high-speed operation up to 4,800 rpm. The robust construction from chrome steel provides excellent durability and a long service life in demanding industrial environments.
7317 BECBJ Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7317 | Basic Bearing Number | Defines the standard metric dimensions: 85 mm bore, 180 mm OD, 41 mm width. |
| BE | High Capacity & Optimized Internal Design | Indicates a modified internal geometry with a larger ball complement and optimized raceway contact for increased load capacity. |
| CB | Specific Internal Clearance & Preload | Denotes a specific internal clearance group and preload setting, ensuring consistent high rigidity and precise running geometry under operational conditions. |
| J | Stainless Steel Pressed Cage | Specifies the use of a stainless steel cage, contributing to the bearing's suitability for high-speed applications and resistance to corrosion from certain lubricants. |
7317 BECBJ Bearing Structural Features & Performance Benefits
Optimized Internal Geometry (BE): The high-capacity design incorporates a greater number of larger balls and optimized raceway profiles. This directly translates to a higher dynamic load rating of 35,100 lbf and static load rating of 29,700 lbf, providing exceptional resistance to fatigue and a longer operational lifespan under heavy combined loads.
High Rigidity and Precision (CB, P6 Tolerance): The controlled internal clearance and preload (CB) ensure minimal axial and radial play, resulting in superior system stiffness and precise shaft positioning. Manufactured to a P6 tolerance class, this bearing guarantees low vibration and high running accuracy, which is critical for precision machinery.
High-Speed Capability (J Cage): The lightweight, robust stainless steel cage effectively guides the balls at high velocities, reducing friction and heat generation. This construction is a key factor in achieving the limiting speed of 4,800 rpm, making it a reliable high-speed bearing.
Superior Material and Heat Treatment: Constructed from high-grade chrome steel for both rings and balls, the bearing undergoes specialized heat treatment to achieve a hardened structure that offers high wear resistance and dimensional stability across the operating temperature range of -30°C to 110°C.
7317 BECBJ Bearing Typical Application Areas
The 7317 BECBJ angular contact ball bearing is ideally suited for applications demanding high precision, speed, and rigidity. Key industries and machinery include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers where precision and rigidity are paramount.
- Industrial Pumps and Compressors: Handling axial and radial loads in high-performance fluid handling systems.
- Precision Gearboxes and Transmissions: Providing accurate shaft location and supporting gear loads.
- Agricultural and Construction Machinery: In heavy-duty applications requiring robust performance under severe conditions.
