71816 ACD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71816 ACD/P4DGB
Basic Information
System of measurement
Metric
Weight
0.3 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
80 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
100 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
35
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4972 lbf
Radial static load rating
7762 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
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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In Stock
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71816 ACD/P4DGB Bearing Product Overview & Core Advantages
The 71816 ACD/P4DGB is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-loaded duplex set, it is engineered to handle combined radial and axial loads simultaneously with high stability. Its P4 tolerance class and optimized internal geometry ensure superior running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and high system rigidity are critical.
Model Code In-Depth Explanation
| Code Segment | Technical Meaning |
|---|---|
| 71816 | Basic bearing series, indicating a super-precision angular contact design with 80mm bore, 100mm OD, and 20mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates the bearing is supplied as a duplex set (two bearings). |
| P4 | Denotes a high-precision tolerance class (equivalent to ISO Class 4), ensuring extremely tight dimensional and running accuracy. |
| DGB | Signifies a Universal Matchable (SU) arrangement with Light preload (Class B). This allows the two bearings to be mounted in either back-to-back (DB) or face-to-face (DF) configurations to optimize stiffness and moment load capacity. |
71816 ACD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex set configuration and 25° contact angle provide significantly increased system rigidity, enabling the bearing to withstand combined loads and moment loads effectively. The universal matchable design offers flexibility in mounting to achieve the required stiffness.
- Super-Precision Performance: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing guarantees minimal vibration and exceptional running accuracy, which is paramount for high-speed applications.
- Optimized for High Speeds: The lightweight phenolic cage and precision-ground chrome steel components contribute to a high limiting speed of 28,000 rpm, reducing centrifugal forces and operational temperatures.
- Pre-Lubricated & Ready-to-Use: The bearing comes pre-lubricated, simplifying installation and ensuring immediate, reliable operation within its specified temperature range.
71816 ACD/P4DGB Bearing Typical Application Areas
This super-precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: Industrial robots, rotary tables, and indexing heads.
- High-Frequency Motors & Spindles: Where low vibration and high accuracy are critical.
- Medical & Laboratory Equipment: Centrifuges and precision instruments.
