71813 ACDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71813 ACDGB/P4
Basic Information
System of measurement
Metric
Weight
0.13 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
10 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
2858 lbf
Radial static load rating
3150 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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 ACDGB/P4 Bearing Product Overview & Core Advantages
The 71813 ACDGB/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, it delivers superior running accuracy and dimensional stability. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction. The 25° contact angle and light preload (Class B) optimize it for high-speed operation while maintaining system stiffness, making it an ideal choice for precision spindles and other demanding machinery.
71813 ACDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
The model number 71813 ACDGB/P4 is decoded as follows:
- 71813: Basic series designation for a single-row angular contact ball bearing.
- AC: Angular Contact design with a defined contact angle.
- D: Specific internal design optimized for high-speed performance.
- GB: Indicates Light Preload (Class B), which enhances rigidity and minimizes axial play.
- P4: Denotes the tolerance class, signifying very high precision in dimensions and running accuracy.
71813 ACDGB/P4 Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Built to P4 tolerance standards with a phenolic resin cage, this bearing ensures minimal vibration and high running accuracy, essential for high-speed applications.
- Superior Load Capacity: The 25° contact angle and robust construction using chrome steel for rings and balls enable it to handle high radial dynamic load ratings (2858 lbf) and axial loads simultaneously.
- Optimized High-Speed Performance: The combination of the lightweight phenolic cage, precision grinding, and light preload allows for a high limiting speed of 36,000 rpm, reducing centrifugal forces and heat generation.
- Universal Matching Capability (SU): This bearing is universally matchable, meaning bearings can be mounted in pairs or sets (up to 3 in a set) without selective assembly, simplifying installation and ensuring pre-defined performance.
71813 ACDGB/P4 Bearing Typical Application Areas
The 71813 ACDGB/P4 is engineered for high-performance machinery where precision and speed are critical. Its primary applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motors.
- Medical Equipment: Dental handpieces and surgical drill spindles.
- Aerospace Actuators and Robotic Joints requiring high rigidity and accuracy.
