3217 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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3217 A Bearing Product Overview & Core Advantages
The 3217 A is a precision double row angular contact ball bearing designed for applications requiring high rigidity and exceptional running accuracy. Engineered to simultaneously accommodate combined loads (radial and bidirectional axial loads), this bearing features a compact design that provides stable rotational performance in high-precision machinery. Manufactured to P6 (ABEC-3) tolerance class with premium chrome steel components, it delivers reliable operation and long service life in demanding industrial environments.
3217 A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Performance Impact |
|---|---|---|
| A | 30° contact angle design | Optimized for handling significant axial loads in both directions |
| Open | No seals/contact shields | Enables higher speed capability and facilitates relubrication |
3217 A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness, enabling the bearing to handle combined loads of up to 27,900 lbf dynamic and 24,750 lbf static ratings. The optimized bearing dimensions (85mm bore × 150mm OD × 49.2mm width) ensure maximum load distribution across both contact angles.
Precision Engineering: Manufactured to P6 tolerance class with tight dimensional controls (bore/OD tolerance: -0.015mm to 0), this bearing guarantees exceptional running accuracy and minimal vibration. The stainless steel cage maintains ball alignment and reduces friction at high speeds.
High-Speed Capability: With a limiting speed of 3,800 rpm, the 3217 A is engineered for demanding rotational applications. The open design allows for efficient lubrication management and heat dissipation.
Material Excellence: Constructed from chrome steel rings and balls, the bearing offers excellent wear resistance and durability across the operating temperature range of -30°C to 110°C.
3217 A Bearing Typical Application Areas
- Machine Tool Spindles: Precision machining centers and grinding spindles requiring high rigidity and accuracy
- Industrial Gearboxes: Power transmission systems needing reliable combined load support
- Pump Systems: Centrifugal pumps and compressor applications demanding high-speed performance
- Precision Positioning Systems: Robotics and automation equipment requiring exact rotational control
- Material Handling Equipment: Conveyor systems and industrial fans operating under continuous load conditions
