7213 ACD/P4ATBTG172
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7213 ACD/P4ATBTG172 Bearing Product Overview & Core Advantages
The 7213 ACD/P4ATBTG172 is a precision angular contact ball bearing configured in a triplex back-to-back (TBT) matched set. This arrangement delivers exceptional high rigidity and is engineered to handle significant combined loads, including heavy radial and bidirectional axial loads. Manufactured to a P4A super-precision tolerance class, it is the ideal solution for high-speed, high-accuracy applications demanding maximum rotational stability and long-term reliability.
Model Code In-Depth Analysis
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Standard bore diameter (65 mm), outside diameter (120 mm), and width (69 mm) dimensions. |
| ACD | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| P4A | Denotes a super-precision tolerance class, ensuring minimal runout and superior running accuracy. |
| TBT | Specifies a Triplex Back-to-Back matched set of three bearings, providing high moment stiffness. |
| G172 | Indicates a specific preload level applied to the matched set for immediate operational readiness and rigidity. |
7213 ACD/P4ATBTG172 Bearing Structural Features & Performance Benefits
- High Rigidity & Moment Load Capacity: The triplex back-to-back (TBT) configuration creates a wide, rigid support system that effectively resists moment loads and shaft deflection, which is critical for maintaining precision under heavy combined loads.
- Superior Load Handling: With a 25° contact angle and three bearings sharing the load, this set offers a high radial dynamic load rating of 31,050 lbf and excellent bidirectional axial load capacity.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the P4A precision grinding minimizes vibration, enabling stable operation up to the limiting speed of 32,500 rpm.
- Pre-Configured for Performance: The set is supplied lubricatedpreload (G172), eliminating the need for complex on-site adjustment and ensuring immediate, optimal performance from installation.
7213 ACD/P4ATBTG172 Bearing Typical Application Areas
This high-performance bearing set is specifically designed for demanding applications where extreme precision, rigidity, and speed are non-negotiable. Key industries and machinery include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where minimal runout and high stiffness are paramount.
- High-Frequency Machining Centers: Demanding bearing arrangements for superior surface finish and accuracy.
- Industrial Pumps and Compressors: For applications requiring robust support for combined radial and axial loads.
