S71920 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71920 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.68 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
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1576.64
/ each
In Stock
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S71920 CD/HCP4A Bearing Product Overview & Core Advantages
The S71920 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications. This single bearing features a 15° contact angle and is supplied with a preload, delivering exceptional rotational accuracy, high rigidity, and reliable performance under combined loads. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance, making it an ideal solution for machine tool spindles and other precision equipment where reliability and accuracy are paramount.
Model Code Breakdown
| Suffix | Technical Meaning |
|---|---|
| S | Stainless Steel Bearing Ring |
| 7 | Angular Contact Ball Bearing |
| 1920 | Size Series Code (19) and Bore Diameter Code (20 → 100mm) |
| C | 15° Contact Angle |
| D | Enhanced Internal Design / Preload |
| HC | Hybrid Ceramic (Ceramic Balls, Steel Rings) |
| P4 | High Precision Tolerance Class (ABEC-7) |
| A | Specific Internal Clearance / Preload Level |
S71920 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The P4 (ABEC-7) tolerance class and factory-applied preload ensure minimal axial and radial runout, providing exceptional system stiffness and positioning accuracy critical for high-speed spindles.
- Superior High-Speed Capability: The combination of lightweight ceramic balls (Si3N4) and a phenolic resin cage significantly reduces centrifugal forces and operating temperatures, enabling a high limiting speed of 11,000 rpm.
- Extended Service Life and Reliability: Hybrid construction with ceramic balls offers superior resistance to wear and provides electrical insulation. The bearing is pre-lubricated for immediate operation and long-term performance within a temperature range of -30°C to 110°C.
- Robust Load Capacity: Designed to handle combined (radial and axial) loads simultaneously, with a high dynamic load rating of 13,612 lbf and static load rating of 14,738 lbf.
S71920 CD/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications requiring high speed, accuracy, and rigidity, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- High-Frequency Motors and Spindles: Motors for CNC machinery and PCB drilling.
- Medical and Laboratory Equipment: Centrifuges and high-speed scanners.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
