71901 CE/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71901 CE/P4ADBC
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
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
776 lbf
Radial static load rating
396 lbf
Limiting speed
165 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71901 CE/P4ADBC Bearing Product Overview & Core Advantages
The 71901 CE/P4ADBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement bearing set is preloaded to Moderate / Class C specifications, delivering superior system stiffness and precise shaft positioning. Its primary advantage lies in its ability to handle combined loads—simultaneously supporting significant radial and axial loads. Manufactured to a P4A tolerance class, it is an ideal solution for high-precision, high-speed machinery where minimal runout and maximum reliability are critical.
71901 CE/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing designation (ultra-light series, 12mm bore) |
| CE | Contact angle of 15° |
| P4A | High precision tolerance class (superior to ABEC 7) |
| DB | Duplex Back-to-Back mounting arrangement |
| C | Moderate preload level |
71901 CE/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and provides exceptional axial and radial stiffness, crucial for maintaining precision under operational stresses.
- Superior Load Capacity: The 15° contact angle is optimized to handle substantial combined radial and axial loads simultaneously, making it suitable for applications with complex loading conditions.
- High-Speed Capability: The lightweight phenolic resin cage ensures smooth operation, reduces centrifugal forces, and contributes to the high limiting speed of 165,000 rpm. The open design facilitates efficient lubrication management.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, this bearing guarantees minimal vibration and high running accuracy.
- Durable Construction: Components made from chrome steel provide high hardness, wear resistance, and a long operational life under demanding conditions.
71901 CE/P4ADBC Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- High-Frequency Spindles for CNC machining centers and PCB drilling machines
- Precision grinding spindles
- High-speed machine tool applications
- Advanced medical and dental handpieces
- Precision instrumentation and robotics
