S71910 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71910 CDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.14 kg
Tolerance class
P4A
Seal type
Sealed
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
34 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
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:
$ 91.75
/ each
In Stock
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S71910 CDGA/P4A Bearing Product Overview & Core Advantages
The S71910 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy, rigidity, and speed. As a single bearing from a universally matchable (SU) pair, it excels in handling combined loads—simultaneously supporting substantial radial loads and axial loads in one direction. Its P4A tolerance class and extra light preload (Class A) ensure exceptional running accuracy and minimal heat generation, making it ideal for high-speed spindles and other high-precision machinery.
S71910 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| 71910 | Basic bearing series, indicating a 50mm bore, 72mm OD, and 12mm width. |
| C | 15° contact angle, optimized for high-speed performance and axial load capacity. |
| DG | Universal Match (DUO) arrangement. This bearing is one of a universally matchable pair (SU). |
| A | Extra light preload (Class A), minimizing friction and heat for superior high-speed operation. |
| P4A | Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for exceptional dimensional and running accuracy. |
S71910 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The optimized internal geometry, including a 15° contact angle and precision-ground chrome steel components, provides high rigidity and enables the bearing to handle significant combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the extra light preload minimizes friction. This combination allows for a high limiting speed of 34,000 rpm, making it a true high-speed bearing.
- Precision and Stability: Manufactured to P4A super-precision tolerances, this bearing ensures minimal runout and vibration, which is critical for maintaining machining accuracy and surface finish.
- Sealed and Pre-Lubricated: The bearing is sealed and pre-lubricated with high-performance grease, protecting against contamination and providing reliable operation within a temperature range of -30°C to 110°C without immediate re-lubrication.
S71910 CDGA/P4A Bearing Typical Application Areas
The S71910 CDGA/P4A is engineered for the most demanding precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
