71910 ACD/HCP4ADBB
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71910 ACD/HCP4ADBB
Basic Information
System of measurement
Metric
Weight
0.24 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4680 lbf
Radial static load rating
4410 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
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
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71910 ACD/HCP4ADBB Bearing Product Overview & Core Advantages
The 71910 ACD/HCP4ADBB is a precision angular contact ball bearing supplied as a matched duplex set in a Back-to-Back (DB) arrangement. Engineered for high-precision and high-rigidity applications, this bearing is designed to accommodate combined radial and axial loads simultaneously. Its construction with a light preload (Class B) ensures optimal operational accuracy and minimal runout, making it ideal for demanding, high-speed machinery where positional stability is critical.
71910 ACD/HCP4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | The bearing is part of a Duplex (matched pair) set. |
| HC | Indicates Hybrid Ceramic construction (Ceramic balls with steel rings). |
| P4A | Specifies a high-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| DB | Denotes the Back-to-Back mounting arrangement of the duplex set. |
| B | Specifies a Light Preload (Class B). |
71910 ACD/HCP4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid, moment-resistant bearing system, capable of handling significant combined radial and axial loads from both directions.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 46,000 rpm. This also minimizes heat generation and energy loss.
- Enhanced Precision and Longevity: The P4A tolerance class guarantees extremely tight dimensional and running accuracy. Hybrid ceramic construction offers superior wear resistance, extended service life, and is less susceptible to lubricant degradation.
- Optimized for Precision Applications: The light preload eliminates internal clearance, ensuring precise shaft positioning, reduced vibration, and improved system responsiveness.
71910 ACD/HCP4ADBB Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications requiring exceptional speed, rigidity, and precision, such as:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotic Drives
- Advanced Medical and Dental Equipment
- Aerospace Actuators and Control Systems
