7210 CD/P4ATBTB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7210 CD/P4ATBTB Bearing Product Overview & Core Advantages
The 7210 CD/P4ATBTB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set delivers superior performance in handling combined loads (radial and axial) simultaneously. Manufactured to P4A tolerance class, it ensures minimal runout and high rotational accuracy. The light preload (Class B) minimizes deflection under operational stresses, making it ideal for high-speed spindles and precision machinery where high rigidity and stability are paramount.
7210 CD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7210 | Basic bearing designation: 50 mm bore, 90 mm OD, 20 mm width (single bearing) |
| CD | Contact angle of 15° |
| P4A | High precision tolerance class (superior to ABEC 7) |
| TBT | Triplex Back-to-Back matched arrangement (3 bearings) |
7210 CD/P4ATBTB Bearing Structural Features & Performance Benefits
Optimized Rigidity & Load Capacity: The triplex back-to-back configuration creates an extremely rigid bearing system capable of withstanding heavy combined loads from multiple directions. This arrangement provides superior moment stiffness compared to single bearing setups.
High-Speed Performance: Featuring a phenolic cage that reduces centrifugal forces and friction, enabling stable operation at limiting speeds up to 41,000 rpm. The 15° contact angle optimizes axial load capacity while maintaining excellent high-speed characteristics.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls (bore/OD tolerance: -0.004mm to 0) ensuring minimal runout and vibration for precision applications.
Enhanced Durability: Constructed from chrome steel for both rings and balls, providing excellent wear resistance and fatigue life. The pre-lubricated design supports operation within a temperature range of -30°C to 110°C.
7210 CD/P4ATBTB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines
- Precision Robotics: Robotic arm joints and precision positioning systems
- Aerospace Systems: Gyroscopes, navigation instruments, and aircraft control systems
- Medical Equipment: High-speed dental handpieces, surgical tools, and imaging devices
- Semiconductor Manufacturing: Wafer handling equipment and precision positioning stages
