71813 CD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71813 CD/P4DGA
Basic Information
System of measurement
Metric
Weight
0.25 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4972 lbf
Radial static load rating
6750 lbf
Limiting speed
36 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
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In Stock
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71813 CD/P4DGA Bearing Product Overview & Core Advantages
The 71813 CD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, it delivers superior runout control and dimensional stability. Its universal matchable (SU) design allows for flexible mounting in various preload configurations, while the extra light preload (Class A) ensures smooth, low-friction operation ideal for high-speed applications. This bearing is pre-lubricated for immediate use and is engineered to handle combined loads efficiently.
71813 CD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71813 | Basic bearing series and size designation (65mm bore, 85mm OD, 20mm width). |
| CD | Indicates a universal matchable (SU) bearing designed for duplex pairs (DB/DF/DT arrangements). |
| P4 | Denotes a high-precision tolerance class for applications requiring minimal runout and vibration. |
| DGA | Signifies extra light preload (Class A), reducing friction and heat generation for optimal high-speed performance. |
71813 CD/P4DGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 15° contact angle and robust construction enable the bearing to effectively support significant combined radial and axial loads in one direction, providing stable and rigid shaft support.
- Superior High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, while the extra light preload and optimized internal geometry contribute to an exceptionally high limiting speed of 36,000 rpm.
- Precision Engineering: Manufactured to P4 tolerance class with tight dimensional controls on the bore, outside diameter, and width, ensuring predictable performance and ease of installation in precision assemblies.
- Universal Matching Capability: The SU (Universal Matchable) designation means two identical bearings can be paired in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements to meet specific application requirements for stiffness and load capacity.
71813 CD/P4DGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery and systems, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace Control Systems
- Medical and Dental Handpieces
- High-Speed Pumps and Compressors
