71801 CD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71801 CD/P4DGA
Basic Information
System of measurement
Metric
Weight
0.012 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
21 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
2.381 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
760 lbf
Radial static load rating
531 lbf
Limiting speed
140 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
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71801 CD/P4DGA Bearing Product Overview & Core Advantages
The 71801 CD/P4DGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4 tolerance class, this metric bearing features a universal matchable (SU) design, allowing two bearings to be paired in a back-to-back or face-to-face arrangement for optimal stiffness and moment load capacity. Its extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
71801 CD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71801 | Basic bearing designation indicating a super-precision, light series bearing with a 12 mm bore. |
| CD | Signifies a 15° contact angle and a universal matchable (SU) design. Two CD-designated bearings can be universally paired. |
| P4 | Indicates the tolerance class, signifying very high precision levels for dimensional and running accuracy. |
| DGA | Denotes that the bearing is lubricated with a specific high-performance grease suitable for the specified temperature range. |
71801 CD/P4DGA Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design, combined with P4-grade manufacturing and phenolic cage, provides exceptional dimensional stability and high rigidity, essential for minimizing deflection under load.
- Optimized for High Speeds: The lightweight phenolic cage and extra light preload reduce centrifugal forces and friction, enabling a high limiting speed of 140,000 rpm. The 15° contact angle offers an excellent balance between radial and axial load capacity for high-speed applications.
- Superior Load Capacity: Engineered to handle combined loads (simultaneous radial and axial forces), making it suitable for complex loading conditions. The universal matchable design allows for the creation of preloaded sets that significantly increase system stiffness and load rating.
- Ready-to-Install: The bearing is pre-lubricated, ensuring immediate operation and simplifying the installation process.
71801 CD/P4DGA Bearing Typical Application Areas
This bearing is ideally suited for high-precision, high-speed rotational systems, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling heads.
- High-Speed Motors and Drives: Where precision and rotational accuracy are paramount.
- Precision Instrumentation: Including measuring devices and optical scanners.
- Dental and Medical Handpieces: Requiring compact size, high speed, and reliability.
