71910 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 CDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.13 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
12 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
3038 lbf
Radial static load rating
2340 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 111.6
/ each
In Stock
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71910 CDGA/P4A Bearing Product Overview & Core Advantages
The 71910 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing features an Extra Light (A) preload and a 15° contact angle, making it ideal for machine tool spindles and other high-precision equipment. Its universal matching (SU) designation allows for flexible mounting in sets to achieve optimal stiffness and load distribution. The open design, combined with a phenolic cage, enables superior high-speed capability with a limiting speed of 46,000 rpm.
71910 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing designation, indicating a super-precision, light series angular contact ball bearing with a 50 mm bore. |
| C | 15° nominal contact angle. |
| D | Universal Matchable (SU) bearing. Can be mounted in any combination to form a set. |
| G | Pre-greased with a specific high-speed lubricant. |
| A | Extra Light preload class. |
| P4A | High-precision tolerance class, superior to ABEC 7. |
71910 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance standards with extremely tight dimensional runouts, ensuring minimal vibration and high positional accuracy for spindle applications.
- Optimized High-Speed Performance: The lightweight phenolic resin cage and 15° contact angle reduce centrifugal forces and friction, enabling stable operation at the high limiting speed of 46,000 rpm.
- Superior Load Capacity: The angular contact design efficiently supports combined loads (radial and axial), with a dynamic load rating of 3038 lbf and a static load rating of 2340 lbf.
- Universal Matching Capability (SU): As a Universal Matchable bearing, the 71910 CDGA/P4A can be mounted in any combination (back-to-back, face-to-face, or tandem) with other SU bearings from a matched set, simplifying assembly and optimizing system performance.
- Pre-lubricated for Immediate Use: The bearing is pre-greased with a high-speed lubricant suitable for the specified temperature range, ensuring immediate startup and reliable initial operation.
71910 CDGA/P4A Bearing Typical Application Areas
This super-precision angular contact ball bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, high-frequency motors.
- Robotics: High-accuracy joints and actuators.
- Medical Equipment: Dental handpieces, centrifuges.
- Aerospace Systems: Gyroscopes, navigation instruments.
