71810 CD/P4QBCC
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71810 CD/P4QBCC
Basic Information
System of measurement
Metric
Weight
0.2 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
65 mm
Outside diameter tolerance
-0.004mm to 0
Width
28 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
30
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4388 lbf
Radial static load rating
7088 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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71810 CD/P4QBCC Bearing Product Overview & Core Advantages
The 71810 CD/P4QBCC is a precision angular contact ball bearing designed for demanding applications requiring high rigidity and exceptional running accuracy. As part of a quadruplex back-to-back (QBC) matched set, it is engineered to handle combined loads—significant radial and axial loads in both directions—simultaneously. Its P4 tolerance class ensures ultra-precise dimensions and minimal runout, making it ideal for high-speed spindles and other precision machinery where superior rotational accuracy is paramount.
71810 CD/P4QBCC Bearing Model Code Explained, Specifications & Naming Convention
The model number 71810 CD/P4QBCC is decoded as follows:
- 71810: Denotes the bearing series and size (10mm bore x 65mm OD x 28mm width).
- C: Indicates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Signifies a specific internal design and moderate preload (Class C) for enhanced rigidity.
- P4: Specifies the tolerance class, indicating very high precision in dimensions and running accuracy.
- QBCC: Identifies the bearing as part of a Quadruplex Back-to-Back (QBC) matched set with a specific preload and internal clearance.
71810 CD/P4QBCC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates a highly rigid bearing system capable of supporting substantial combined loads and moments. The moderate preload (Class C) eliminates internal clearance, increasing system stiffness and improving positional accuracy.
- High-Speed Performance: The 15° contact angle and lightweight phenolic cage are optimized for high-speed operation, enabling a limiting speed of 46,000 rpm. This combination reduces centrifugal forces and operating temperatures.
- Precision & Accuracy: Manufactured to P4 tolerance class, this bearing guarantees extremely tight dimensional and running accuracy, which is critical for applications requiring minimal vibration and high rotational precision.
- Durability & Reliability: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance. The phenolic cage provides robust performance at high speeds.
71810 CD/P4QBCC Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, dental handpieces, and other small, high-speed spindles.
- High-Frequency Motors: Spindles for electric motors requiring high rotational accuracy.
- Robotics: Precision joints and arm linkages.
