71901 ACE/P4ADT
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71901 ACE/P4ADT
Basic Information
System of measurement
Metric
Weight
0.02 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
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
747 lbf
Radial static load rating
382 lbf
Limiting speed
140 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
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.
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71901 ACE/P4ADT Bearing Product Overview & Core Advantages
The 71901 ACE/P4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to P4A tolerance class, ensuring superior running accuracy and rotational precision. Its primary advantage lies in its ability to handle high axial loads in one direction with excellent operational stability, making it ideal for high-speed spindles and precision machinery where rigidity and minimal runout are critical.
71901 ACE/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing designation (ultra-light series, 12mm bore) |
| ACE | Specific internal design with a 25° contact angle for optimal axial load capacity |
| P4A | High-precision tolerance class exceeding ABEC 7 standards |
| DT | Duplex Tandem arrangement - two bearings mounted together to increase axial load capacity in the same direction |
71901 ACE/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem configuration and 25° contact angle provide exceptional stiffness and enable the bearing set to withstand significant axial loads in one direction, making it suitable for preloaded systems.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for superior rotational accuracy.
- High-Speed Capability: The phenolic resin cage offers low weight and excellent performance at high rotational speeds, supporting the limiting speed of 140,000 rpm.
- Optimized Internal Geometry: Features 12 precision balls made of chrome steel with a diameter of 3.175mm, contributing to smooth operation and extended service life.
71901 ACE/P4ADT Bearing Typical Application Areas
- High-Speed Machine Tool Spindles
- Precision Grinding Applications
- High-Frequency Motor Spindles
- Medical & Dental Equipment
- Aerospace Control Systems
- Robotic Joints & Actuators
