71817 ACDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71817 ACDGB/P4
Basic Information
System of measurement
Metric
Weight
0.27 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
30
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4568 lbf
Radial static load rating
5400 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
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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71817 ACDGB/P4 Bearing Product Overview & Core Advantages
The 71817 ACDGB/P4 is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 tolerance class, this bearing excels in high-speed operations with a limiting speed of 28,000 rpm. Its 25° contact angle and light preload (Class B) are optimized to handle combined loads, providing robust support for both radial and significant axial loads in one direction. The phenolic cage and universal matchable (SU) designation make it ideal for high-precision, high-reliability spindle arrangements.
71817 ACDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
The model number 71817 ACDGB/P4 is decoded as follows:
- 71817: Basic bearing series, indicating a metric, single-row angular contact design.
- AC: Angular Contact design with a 25° contact angle.
- D: High-Precision designation.
- GB: Light Preload (Class B).
- P4: Tolerance class equivalent to ISO Class 4, denoting very high running accuracy.
71817 ACDGB/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class standards, the bearing ensures minimal runout and vibration, which is critical for high-speed and high-precision applications. The light preload eliminates internal clearance, enhancing system stiffness and positioning accuracy.
- Superior Load Capacity: The 25° contact angle is engineered to efficiently support combined radial and axial loads. With a dynamic load rating of 4568 lbf and a static load rating of 5400 lbf, it offers reliable performance under demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, enabling stable operation at the high limiting speed of 28,000 rpm. The open design allows for efficient lubrication management.
- Precision Materials: Constructed from chrome steel for both rings and balls, the bearing provides high durability and wear resistance, suitable for a wide temperature range from -30°C to 110°C.
71817 ACDGB/P4 Bearing Typical Application Areas
This precision bearing is ideally suited for applications where high rotational accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and laboratory equipment.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and high rotational stability.
- Robotics: Critical joints and arm assemblies demanding high positional accuracy.
