71813 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71813 ACD/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
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4680 lbf
Radial static load rating
6300 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
No drawings available at the moment, will be launched soon
In Stock
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71813 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71813 ACD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. Manufactured to P4 tolerance class, it offers superior dimensional stability and running accuracy. Its universal matchable (SU) design allows for flexible mounting in pairs to support combined loads (radial and axial) from both directions. The combination of a phenolic cage and a 25° contact angle enables high limiting speeds while maintaining high rigidity, making it ideal for high-precision spindles and other critical machinery.
71813 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71813 ACD/P4DGA is decoded as follows:
- 71813: Basic series designation for a high-precision, light-weight angular contact ball bearing.
- ACD: Angular Contact design with a 25° contact angle and Duplex arrangement (implying universal matching capability).
- P4: Indicates a high-precision tolerance class per ISO standards, ensuring minimal runout and superior rotational accuracy.
- DGA: Signifies the bearing is supplied lubricated and is part of a universally matchable set (SU).
71813 ACD/P4DGA Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Built to P4 tolerance class with tight dimensional controls on bore, outside diameter, and width, this bearing provides stable, high-rigidity support for precise applications.
- Superior Load Capacity: The 25° contact angle and duplex-ready design are optimized to handle significant combined radial and axial loads efficiently.
- High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 36,000 rpm, reducing centrifugal forces and operational temperatures.
- Universal Matching (SU): As a universal matchable bearing, any two bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement without selective matching, simplifying installation and inventory.
- Pre-Lubricated: The bearing comes pre-lubricated, ensuring immediate readiness for operation and protection during the initial run-in period.
71813 ACD/P4DGA Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Medical and Dental Equipment
- Aerospace Control Systems
