71910 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 ACDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.13 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
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 90.72
/ each
In Stock
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71910 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71910 ACDGB/P4A is a precision angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. As a single bearing with a 25° contact angle and Light preload (Class B), it is engineered to accommodate combined loads—significant radial loads and axial loads in one direction. Manufactured to P4A tolerance class, it guarantees ultra-precise dimensions and minimal runout, making it ideal for high-speed spindles and other high-rigidity precision machinery. Its Universal Matchable (SU) designation allows for precise matched arrangement in sets, enabling optimized preload and performance in complex assemblies.
71910 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series, indicating a high-precision, light series angular contact ball bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Optimized internal design for higher load capacity and high-speed performance. |
| GB | Light Preload (Class B), providing controlled internal clearance for reduced deflection and enhanced system rigidity. |
| /P4A | Super Precision Tolerance Class, specifying extremely tight dimensional and running accuracy tolerances for the highest level of performance. |
71910 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and optimized internal geometry enable the bearing to support substantial combined radial and axial loads. The light preload eliminates internal clearance, significantly increasing system stiffness and minimizing deflection under operational loads.
- High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent sliding properties, reducing centrifugal forces and friction. This, combined with the precision-ground chrome steel components, allows for a high limiting speed of 46,000 rpm.
- Precision & Accuracy: Manufactured to ABEC 7 / P4A tolerance standards, this bearing ensures ultra-low vibration and precise running accuracy, which is critical for applications requiring high positional repeatability.
- Universal Matching: Designated as Universal Matchable (SU), individual 71910 ACDGB/P4A bearings can be selectively assembled into sets of two or more (commonly 3) to achieve specific preload and stiffness characteristics without the need for special manufacturing lots.
71910 ACDGB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-demand applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Robotics: High-accuracy joints and arm assemblies.
