71910 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71910 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.12 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
12 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
2858 lbf
Radial static load rating
2205 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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71910 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 71910 ACDGA/HCP4A is a single-row angular contact ball bearing designed for high-precision and high-speed applications. Engineered to accommodate combined loads (radial and axial loads in one direction), this bearing features a 25° contact angle for optimal axial load capacity. Its P4A tolerance class ensures exceptional dimensional and running accuracy, making it ideal for machine tool spindles and other demanding equipment requiring superior rotational precision and rigidity. The combination of a phenolic cage and ceramic balls contributes to its outstanding high-speed performance and reduced rotational inertia.
71910 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation. |
| AC | Angular Contact design. |
| D | High contact angle (25°). |
| GA | Universal Matchable bearing, designed to be mounted in sets (3 bearings in this case). |
| HC | Hybrid Ceramic: Features ceramic balls for enhanced performance. |
| P4A | High precision tolerance class, exceeding ABEC 7 standards. |
71910 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The lightweight phenolic resin cage and low-density ceramic (Si3N4) balls significantly reduce centrifugal forces, enabling a high limiting speed of 46,000 rpm. This hybrid construction also provides superior performance in lubricant-starved conditions.
- High Rigidity & Load Capacity: The 25° contact angle is optimized to handle significant one-direction axial loads in combination with radial loads, providing stable and rigid support for spindles.
- Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for achieving high surface finishes and machining accuracy.
- Universal Matching (SU): This bearing is universally matchable, allowing for flexible arrangement in sets (typically in tandem or back-to-back) to achieve the required preload and system stiffness without selective mounting.
- Preload & Temperature: Supplied with an Extra light (Class A) preload, it is ready for high-precision applications. The specified temperature range of -30°C to 110°C ensures reliable operation in various environments.
71910 ACDGA/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications demanding high speed, accuracy, and rigidity, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and high-frequency motor spindles.
- Robotics: High-precision joints and actuators.
- Aerospace & Defense: Gyroscopes, radar systems, and other critical navigation equipment.
