S71920 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71920 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.81 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.009mm 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° to 110 °C
Radial dynamic load rating
13612 lbf
Radial static load rating
14738 lbf
Limiting speed
9 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 1576.17
/ each
In Stock
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S71920 CD/P4A Bearing Product Overview & Core Advantages
The S71920 CD/P4A is a single-row angular contact ball bearing engineered for precision applications requiring high rotational accuracy and rigidity. This precision bearing is distinguished by its P4 (ABEC-7) tolerance class, ensuring minimal runout and superior performance. Its key advantage lies in its ability to accommodate high-speed operation while supporting significant combined loads—both radial and axial thrust loads in one direction. The bearing comes preloaded, enhancing system stiffness and rotational accuracy, making it an ideal choice for high-reliability, high-precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71920 | Basic bearing series, indicating a single-row angular contact ball bearing with a 100mm bore. |
| C | Specifies a 15° contact angle, optimized for high-speed applications and moderate axial load capacity. |
| D | Indicates a high preload grade for maximum system rigidity and precise shaft positioning. |
| P4A | Denotes a P4 (ABEC-7) tolerance class, representing ultra-precision manufacturing standards for high-accuracy applications. |
S71920 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Preload: The high preload (D) and optimized internal geometry provide exceptional system stiffness, minimizing deflection under load and ensuring precise rotational characteristics.
- Superior Load Capacity: Engineered with a 15° contact angle and high-grade chrome steel components, this bearing effectively supports significant combined radial and axial loads.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling stable operation at high speeds up to 9,000 rpm.
- Precision & Longevity: Manufactured to P4 tolerance standards with a sealed design, it offers low noise, low vibration, and consistent performance in demanding environments.
S71920 CD/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles for CNC milling and grinding machines
- High-Speed Spindles in precision machining centers
- Robotic Arms and precision gearboxes
- Medical Equipment such as high-speed dental handpieces and imaging devices
- Aerospace Actuation Systems and instrumentation
