71910 ACD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71910 ACD/P4ADBA
Basic Information
System of measurement
Metric
Weight
0.26 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
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
71910 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 71910 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched pair of bearings, arranged in a Back-to-Back (DB) configuration, is engineered to handle combined loads—simultaneously supporting significant radial and axial loads from both directions. Manufactured to the stringent P4A tolerance class and featuring an Extra Light (Class A) preload, it delivers superior running accuracy, high system stiffness, and optimal performance in high-speed, high-precision machinery.
71910 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| 71910 | Basic bearing series, indicating a light series bearing with a 50 mm bore and 72 mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex set, consisting of two bearings. |
| P4A | High precision tolerance class (superior to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
| DB | Back-to-Back mounting arrangement, providing high moment rigidity and the ability to accommodate axial loads in both directions. |
| A | Specifies an Extra Light preload for minimal friction and optimal high-speed performance. |
71910 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex Back-to-Back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional operational stability.
- Superior Load Capacity: The 25° contact angle and optimized internal geometry enable the bearing to carry significant combined radial and axial loads from both directions simultaneously.
- High-Speed Capability: The lightweight, durable phenolic resin cage and the extra light preload minimize centrifugal forces and friction, allowing for a high limiting speed of 46,000 rpm.
- Precision Performance: Manufactured to P4A tolerance class with extremely tight bore, outside diameter, and width tolerances, this bearing guarantees smooth, quiet, and vibration-free operation critical for precision applications.
- Optimized for Performance: The set is pre-lubricated and features an open design, making it suitable for integrated central lubrication systems in demanding environments.
71910 ACD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for the spindles and critical rotating elements in:
- Machine Tool Spindles (e.g., CNC machining centers, grinders)
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arms and Precision Gearboxes
