71902 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71902 CD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.028 kg
Tolerance class
P4A
Seal type
Open
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
-0.004mm to 0
Width
14 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°C to 110 °C
Radial dynamic load rating
1462 lbf
Radial static load rating
855 lbf
Limiting speed
230 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
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
71902 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71902 CD/HCP4ADGA is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. Operating as a universal matchable (SU) pair, this bearing is designed to handle combined loads—simultaneously supporting significant radial and axial loads in one direction. Its core advantages stem from a P4A super-precision tolerance class, a ceramic ball construction, and an extra light preload (Class A), making it ideal for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing series and size designation (15mm bore, 28mm OD). |
| CD | Indicates a universal matchable (SU) bearing pair with a 15° contact angle, designed to be mounted in either a DB or DF arrangement. |
| HC | Signifies the use of Hybrid Ceramic balls, offering reduced weight, lower friction, and superior high-speed performance. |
| P4A | Denotes an ABEC 7 / ISO P4 super precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DGA | Specifies a Phenolic (resin) cage and an Extra Light Preload (Class A), optimized for minimal friction and high-speed operation. |
71902 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially in high-speed applications.
- High Rigidity & Precision: The angular contact design and P4A tolerance provide exceptional system stiffness and rotational accuracy, which is crucial for machining precision.
- Optimized High-Speed Performance: The lightweight phenolic cage and hybrid ceramic components work in concert to enable a high limiting speed of 230,000 rpm (dn value).
- Universal Matching (SU): As a pre-matched set of two bearings, they offer simplified installation and optimal performance in either back-to-back (DB) or face-to-face (DF) mounting configurations, providing flexibility in machine design.
- Effective Load Capacity: With a 15° contact angle, the bearing is engineered to handle combined radial and axial loads efficiently, offering a dynamic load rating of 1462 lbf and a static load rating of 855 lbf.
71902 CD/HCP4ADGA Bearing Typical Application Areas
This high-precision bearing is specifically designed for advanced machinery where speed, accuracy, and reliability are paramount. Key applications include:
- 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 small motor applications.
- Medical & Dental Equipment: High-speed handpieces and surgical tools.
- Aerospace & Instrumentation: Gyroscopes, navigation systems, and other critical precision instruments.
