7216 CD/P4AQBCB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7216 CD/P4AQBCB Bearing Product Overview & Core Advantages
The 7216 CD/P4AQBCB is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing features a back-to-back quadruplex arrangement (QBC), delivering superior stability under combined loads and moment loads. Its light preload (Class B) ensures optimal running accuracy while minimizing friction, making it ideal for high-speed spindle applications where precision and reliability are critical.
7216 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7216 | Basic bearing series with 80mm bore, 140mm OD, 104mm width |
| CD | 15° contact angle design optimized for high-speed operation |
| P4A | Ultra-precision tolerance class exceeding ABEC 7 standards |
| QBC | Quadruplex Back-to-Back arrangement for maximum rigidity |
7216 CD/P4AQBCB Bearing Structural Features & Performance Benefits
Exceptional Rigidity: The quadruplex back-to-back configuration creates an extremely rigid bearing system capable of withstanding heavy moment loads and maintaining precise shaft positioning under demanding conditions.
Optimized Load Capacity: With a 15° contact angle and four bearing rows, this arrangement provides superior combined load capacity, handling both radial and axial loads simultaneously while maintaining high precision.
High-Speed Capability: The phenolic cage material and precision-ground chrome steel balls enable operation at limiting speeds up to 28,000 rpm, making it suitable for high-speed machining applications.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for superior machining quality.
7216 CD/P4AQBCB Bearing Typical Application Areas
- High-speed machining centers and CNC spindle systems
- Precision grinding spindles for manufacturing applications
- Aerospace component machining equipment
- High-precision rotary tables and indexing heads
- Medical device manufacturing equipment
- Advanced robotics and automation systems
