S71902 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71902 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.014 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
15 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
28 mm
Outside diameter tolerance
-0.005mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
13
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
893 lbf
Radial static load rating
428 lbf
Limiting speed
70 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:
$ 159.22
/ each
In Stock
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S71902 CD/HCP4A Bearing Product Overview & Core Advantages
The S71902 CD/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single-row bearing features a 15° contact angle and is supplied with a preload, ensuring high system rigidity, precise rotational accuracy, and minimal runout. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance, reduced weight, and extended service life. The bearing is pre-lubricated and sealed, making it a ready-to-install, maintenance-free solution for high-reliability machinery.
S71902 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| 71902 | Standard designation for a high-precision, single-row angular contact ball bearing with a 15mm bore. | Defines the core bearing geometry and type. |
| C | Specifies a 15° contact angle. | Optimized for handling combined (radial and axial) loads. |
| D | Indicates the bearing is supplied with a preload. | Enhances rigidity and rotational accuracy for critical applications. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls. | Provides higher speed capability, reduced weight, and non-conductive properties. |
| P4 | Denotes ABEC-7 / ISO P4 tolerance class. | Guarantees ultra-precise dimensions and runout tolerances for high-precision spindles. |
S71902 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, allowing for a limiting speed of 70,000 rpm. This construction also offers electrical insulation, reduced friction, and superior performance in high-temperature environments.
- Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance for the ceramic balls, contributing to smooth operation and high-speed capability.
- Preload & High Rigidity: The bearing is supplied with a preload, which eliminates internal clearance. This results in high system rigidity, improved shaft positioning accuracy, and dampened vibrations, making it ideal for machine tool spindles.
- Superior Sealing and Lubrication: As a sealed and pre-lubricated bearing, it is protected from contamination and retains lubricant effectively. This design ensures long-term, maintenance-free operation and reliability.
- High-Precision Tolerances: Manufactured to ABEC-7 / P4 tolerance class, this bearing guarantees minimal runout and precise dimensional accuracy, which is critical for applications demanding the highest levels of rotational precision.
S71902 CD/HCP4A Bearing Typical Application Areas
The S71902 CD/HCP4A is engineered for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- High-Frequency Machine Tool Spindles: For CNC milling, grinding, and drilling machines.
- Precision Robotics: Arm joints and high-accuracy actuators.
- Medical and Dental Equipment: High-speed handpieces and scanners.
- Aerospace Instrumentation: Gyroscopes, navigation systems, and auxiliary power units (APUs).
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
