7216 CD/HCP4AQBCD
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7216 CD/HCP4AQBCD
Basic Information
System of measurement
Metric
Weight
4.95 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
80 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
104 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
17.462 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
50625 lbf
Radial static load rating
67500 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7216 CD/HCP4AQBCD Bearing Product Overview & Core Advantages
The 7216 CD/HCP4AQBCD is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set of four bearings in a back-to-back (QBC) arrangement is preloaded to Class D (Heavy), delivering maximum system stiffness and runout control. Its configuration is engineered to handle combined radial and axial loads simultaneously, making it ideal for high-speed, high-rigidity spindles in precision machinery. The use of ceramic balls and a phenolic cage further enhances its high-speed performance and thermal stability.
7216 CD/HCP4AQBCD Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a duplex bearing with a specific internal preload and mounting arrangement. In this context, it is part of the quadruplex set designation. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), which reduce centrifugal forces, lower operating temperature, and enable higher limiting speeds. |
| P4A | Denotes an ultra-precision tolerance class exceeding ABEC 7, ensuring minimal runout and superior rotational accuracy for critical applications. |
| QBC | Specifies the Quadruplex Back-to-Back matched arrangement. This configuration provides the highest possible rigidity against moment loads. |
| Open | The bearing is supplied without seals or shields, allowing for customized lubrication schemes and minimizing friction for maximum speed capability. |
7216 CD/HCP4AQBCD Bearing Structural Features & Performance Benefits
- Maximum Rigidity and Stability: The quadruplex back-to-back (QBC) arrangement with a Heavy (Class D) preload creates an extremely rigid bearing system that effectively resists moment loads and deflection, ensuring precise tool or workpiece positioning.
- Superior High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic cage significantly reduces rotating mass and centrifugal forces. This allows the bearing to achieve a high limiting speed of 28,000 rpm with minimal heat generation.
- High Load Capacity: With a 15° contact angle and optimized internal geometry, this bearing set is engineered to support significant combined radial and axial loads, making it suitable for heavy-duty machining operations.
- Precision and Longevity: Manufactured to P4A tolerance class and crafted from high-grade chrome steel rings, this bearing guarantees exceptional running accuracy, low noise, and extended service life in precision equipment.
7216 CD/HCP4AQBCD Bearing Typical Application Areas
This high-performance bearing set is specifically designed for the most demanding applications, including:
- High-Speed CNC Machining Centers and Grinding Spindles
- Precision Machine Tool Spindles requiring extreme rigidity
- High-frequency Milling and Boring Spindles
- Other advanced industrial machinery where high speed, high rigidity, and precision are critical.
