S71920 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71920 CDGA/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
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
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 CDGA/P4A Bearing Product Overview & Core Advantages
The S71920 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy and performance. Operating under the stringent P4A tolerance class, this bearing excels in high-speed and high-rigidity scenarios. Its 15° contact angle and extra light preload (Class A) are optimized for superior rotational accuracy and minimal heat generation. As a Universal Matchable (SU) bearing, it can be supplied in precisely matched sets to achieve optimal preload and stiffness in multi-bearing arrangements, making it an ideal solution for high-precision spindles.
S71920 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71920 CDGA/P4A provides detailed technical specifications:
- S7: Denotes a series of high-precision, high-speed angular contact ball bearings.
- 1920: Indicates the size series, with a 100mm bore and 140mm outside diameter.
- C: Signifies a 15° contact angle.
- DG: Stands for a Duplex arrangement, Ground for universal matching (SU). This allows two bearings to be mounted in any combination (DB, DF, DT) to achieve the required preload and rigidity.
- A: Represents an Extra Light preload (Class A).
- P4A: The tolerance class, indicating ultra-precision dimensional and running accuracy exceeding ABEC 7/ISO P4 standards.
S71920 CDGA/P4A Bearing Structural Features & Performance Benefits
- Super-Precision & High Rigidity: Manufactured to P4A tolerance class with an extra light preload, this bearing delivers exceptional running accuracy and system rigidity, critical for minimizing deflection under load.
- Optimized for High Speeds: The phenolic resin cage is lightweight and robust, enabling stable operation at the high limiting speed of 16,250 rpm. The 15° contact angle further reduces heat generation at high rotational velocities.
- Superior Load Capacity: With a dynamic load rating of 13,612 lbf and a static load rating of 14,738 lbf, it reliably handles combined radial and axial loads.
- Universal Matching Capability (SU): Bearings are universally matchable, allowing for flexible mounting in duplex pairs (DB, DF, DT) without selective assembly, simplifying installation and ensuring consistent, high performance.
- Sealed & Pre-Lubricated: The sealed design with factory-applied grease protects against contamination and provides reliable lubrication within the specified temperature range of -30°C to 110°C.
S71920 CDGA/P4A Bearing Typical Application Areas
This bearing 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 other high-RPM applications.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
