71910 CD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71910 CD/HCP4AQBCA
Basic Information
System of measurement
Metric
Weight
0.48 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8055 lbf
Radial static load rating
9338 lbf
Limiting speed
46 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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71910 CD/HCP4AQBCA Bearing Product Overview & Core Advantages
The 71910 CD/HCP4AQBCA is a super-precision angular contact ball bearing configured as a Quadruplex Back-to-Back (QBC) matched set. Engineered for the most demanding applications, this bearing set delivers exceptional rotational accuracy, high system rigidity, and superior high-speed performance. Its design is optimized to handle combined loads (radial and axial) simultaneously, making it an ideal choice for high-precision spindles requiring maximum stability and minimal runout.
71910 CD/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation (50mm bore, 72mm OD). |
| CD | Specifies a 15° contact angle and high-precision geometry. |
| HC | Indicates Hybrid Ceramic construction (ceramic balls with steel rings). |
| P4A | Denotes an ultra-high tolerance class (superior to ABEC 7), ensuring extreme dimensional and running accuracy. |
| QBC | Signifies a Quadruplex Back-to-Back matched set of 4 bearings, pre-configured for optimal moment stiffness. |
71910 CD/HCP4AQBCA Bearing Structural Features & Performance Benefits
- Ultra-High Rigidity & Moment Load Capacity: The QBC arrangement of four bearings creates an exceptionally stiff bearing system, capable of resisting complex moment loads and ensuring superior shaft positioning accuracy.
- Enhanced High-Speed Capability: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers operating temperatures and allows for a higher limiting speed of 46,000 rpm.
- Extended Service Life & Reliability: Hybrid ceramic construction provides excellent wear resistance and is less susceptible to lubrication starvation. The Extra light (A) preload minimizes friction and heat generation at high speeds.
- Super-Precision Operation: Manufactured to P4A tolerance class, this bearing set guarantees minimal vibration and exceptional running accuracy, which is critical for achieving fine surface finishes and high positional repeatability.
71910 CD/HCP4AQBCA Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tool Main Spindles
- High-Speed Robotic Drives and actuators
- Advanced Dental and Medical Equipment spindles
- Aerospace Test Rigs and instrumentation
