S71920 CDGD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71920 CDGD/P4A
Basic Information
System of measurement
Metric
Weight
0.81 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
13612 lbf
Radial static load rating
14738 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Heavy / Class D
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.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71920 CDGD/P4A Bearing Product Overview & Core Advantages
The S71920 CDGD/P4A is a super-precision angular contact ball bearing designed for the most demanding applications. Engineered to a P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its key advantage lies in its ability to handle combined loads (both radial and axial) simultaneously with high rigidity, thanks to its optimized internal geometry and 15° contact angle. Preloaded with a Heavy / Class D specification, it ensures minimal axial play and superior system stiffness right from installation, making it ideal for high-speed, high-precision spindles and machinery.
S71920 CDGD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Designates a super-precision bearing. |
| 71920 | The basic bearing series and size designation (100mm bore, 140mm OD, 20mm width). |
| C | Specifies a 15° contact angle. |
| DG | Indicates the bearing is part of a Universal Matchable (SU) set. Two bearings with this suffix can be mounted in a Universal matching arrangement (DB, DF, DT). |
| D | Signifies a Heavy preload (Class D). |
| P4A | Denotes an extremely high tolerance class, superior to ABEC 7/ISO P4, ensuring exceptional running accuracy. |
S71920 CDGD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Running Accuracy: Manufactured to P4A tolerances with a Heavy preload, this bearing provides outstanding system stiffness and minimizes deflection under load, which is critical for maintaining precision in machining and positioning.
- Optimized for High-Speed Operation: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 16,250 rpm. The 15° contact angle offers an excellent balance between radial load capacity and high-speed axial load performance.
- Superior Load Capacity: With a dynamic load rating of 13,612 lbf and a static load rating of 14,738 lbf, the bearing is robust enough to handle significant combined loads.
- Universal Matching Capability (SU): The DG suffix allows for simplified mounting in pairs (DB, DF, DT) without the need for selective matching, reducing assembly time and ensuring optimal preload and performance.
- Sealed and Pre-Lubricated: The sealed design with factory-applied grease protects against contamination and provides long-term, maintenance-free operation within the specified temperature range.
S71920 CDGD/P4A Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and milling heads.
- Precision Equipment: High-frequency spindles, robotics, and precision measuring instruments.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other critical rotational systems.
- High-Speed Motors and Drives: Where low vibration and high running accuracy are required.
