71901 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71901 ACDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.01 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
24 mm
Outside diameter tolerance
-0.004mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
574 lbf
Radial static load rating
266 lbf
Limiting speed
140 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
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:
$ 97.49
/ each
In Stock
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71901 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71901 ACDGB/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating under a Light preload (Class B), this bearing is designed to handle significant axial loads in one direction while supporting radial loads, making it ideal for demanding, high-speed environments. Its P4A tolerance class ensures superior dimensional and running accuracy, contributing to enhanced machine performance and longevity. The bearing is universally matchable (SU), allowing for flexible mounting arrangements in pairs to accommodate combined loads.
71901 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing designation indicating a single-row angular contact ball bearing with a 12 mm bore. |
| AC | Angular Contact design with a 25° contact angle, optimized for high axial load capacity. |
| DGB | Universal Matchable (SU) designation, indicating the bearing is ground for universal matching in pairs (back-to-back, face-to-face, or tandem). |
| P4A | High-Precision Tolerance Class, specifying superior dimensional and running accuracy beyond ABEC-7 standards. |
71901 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust chrome steel construction provide high rigidity and enable the bearing to handle substantial axial loads in one direction and radial loads simultaneously. The phenolic resin cage ensures stable operation under high rotational forces.
- High-Speed Performance: With a limiting speed of 140,000 rpm, the bearing is optimized for high-speed applications. The lightweight phenolic cage reduces centrifugal forces, while the precision-ground raceways minimize friction and heat generation.
- Precision Engineering: Manufactured to P4A tolerance class, the bearing offers extremely tight dimensional control (bore and OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for superior accuracy in precision machinery.
- Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be paired in sets of two to create pre-loaded arrangements, enhancing system rigidity and load distribution without selective matching.
71901 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and grinding spindles requiring high precision and rigidity.
- Precision Instrumentation: Measuring devices, optical encoders, and laboratory equipment where minimal runout and high accuracy are critical.
- High-Speed Motors & Drives: Servo motors, spindle drives, and robotics applications demanding high rotational speeds and reliable performance.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and actuation mechanisms requiring precision bearings with tight tolerances.
