71916 CD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71916 CD/HCP4AQBCA
Basic Information
System of measurement
Metric
Weight
1.27 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
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
64 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
21510 lbf
Radial static load rating
35100 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
Extra light / Class A
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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71916 CD/HCP4AQBCA Bearing Product Overview & Core Advantages
The 71916 CD/HCP4AQBCA is a precision angular contact ball bearing configured as a Quadruplex Back-to-Back (QBC) matched set. Engineered for the most demanding applications, this set delivers exceptional system rigidity and high running accuracy. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with superior stability, making it ideal for high-precision, high-speed spindles. The use of ceramic balls and a P4A tolerance class ensures minimal thermal growth and outstanding operational performance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71916 | Basic bearing series and size designation (80mm bore, 110mm OD). |
| CD | 15° contact angle, a standard for high-speed applications. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for reduced friction, higher speed capability, and longer service life. |
| P4A | High-Precision Tolerance Class exceeding ABEC 7/ISO P4, ensuring extremely tight dimensional and running accuracy. |
| QBC | Quadruplex Back-to-Back: A matched set of four bearings arranged back-to-back. This configuration provides maximum rigidity and moment load capacity. |
71916 CD/HCP4AQBCA Bearing Structural Features & Performance Benefits
- Unmatched Rigidity and Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates an extremely stiff bearing system, capable of withstanding heavy combined loads and significant moment loads without deflection, which is critical for machining accuracy.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage, ceramic balls (which are 60% lighter than steel), and a 15° contact angle allows for a very high limiting speed of 28,000 rpm. This reduces centrifugal forces, minimizes heat generation, and enables higher productivity.
- High Precision and Thermal Stability: Manufactured to P4A tolerance class, this bearing set guarantees exceptional running accuracy. The ceramic balls have a lower coefficient of thermal expansion than steel, contributing to consistent preload and performance across the operating temperature range.
- Extended Service Life: The hybrid ceramic design offers superior wear resistance and is less susceptible to lubrication failure, significantly increasing the bearing's operational lifespan under demanding conditions.
71916 CD/HCP4AQBCA Bearing Typical Application Areas
This precision bearing set is specifically designed for high-performance machinery requiring ultimate precision and speed.
- High-Speed Machine Tool Spindles: CNC milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors and direct-drive systems.
- Advanced Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace Testing Equipment and other specialized rotary applications.
