71901 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71901 CD/P4ADGA
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
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
981 lbf
Radial static load rating
562 lbf
Limiting speed
220 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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.
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71901 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71901 CD/P4ADGA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a Universal Matchable (SU) bearing, it is supplied in a pre-set duplex pair, enabling it to accommodate combined loads (radial and axial) simultaneously. Manufactured to an extremely tight P4A tolerance class, it guarantees exceptional running accuracy, low noise, and minimal heat generation, making it ideal for high-reliability spindles and precision machinery.
71901 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Specifies a 15° contact angle and a Universal Matchable (SU) duplex arrangement. This configuration allows the paired bearings to be mounted in either a back-to-back (DB) or face-to-face (DF) arrangement to optimize rigidity and load handling. |
| P4A | Denotes a super-precision tolerance class exceeding ABEC 7/ISO P4. This ensures extremely tight dimensional and running accuracy for superior performance in high-speed applications. |
| DGA | Indicates the bearing is lubricated with a high-performance grease suitable for the specified temperature range. |
71901 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex pair (SU match) and 15° contact angle create a highly rigid system capable of supporting significant combined radial and axial loads.
- Super-Precision High-Speed Performance: The P4A tolerance class and lightweight phenolic resin cage minimize vibration and centrifugal forces, enabling stable operation at the high limiting speed of 220,000 rpm.
- Optimized Internal Geometry: Precision-ground chrome steel rings and balls ensure smooth operation and long service life under high-stress conditions.
- Pre-Lubricated for Immediate Use: The bearing is factory-filled with grease, providing immediate protection and simplifying the installation process.
71901 CD/P4ADGA Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors requiring ultra-high rotational speeds.
- Medical Equipment: High-speed handpieces for dental and surgical tools.
- Aerospace Instrumentation: Gyroscopes and other precision navigation systems.
