71916 ACD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71916 ACD/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.74 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
80 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
32 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
12578 lbf
Radial static load rating
16538 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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71916 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 71916 ACD/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Light / Class B standards, delivering superior system stiffness and minimal runout. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously, making it ideal for high-precision, high-reliability machinery where positional accuracy is paramount.
71916 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
The model number 71916 ACD/P4ADBB provides detailed technical specifications:
- 71916: Basic bearing series, indicating a light series angular contact bearing with an 80mm bore.
- A: Denotes a 25° contact angle, optimized for supporting high axial loads.
- C: Indicates a phenolic resin cage, which is lightweight and suitable for high-speed operation.
- D: Specifies the bearing is part of a duplex pair.
- P4A: The tolerance class, signifying very high precision levels for both bore and outer diameter runout.
- DB: The matched arrangement is Back-to-Back (DB), which provides high moment rigidity and excellent operational stability.
- B: Indicates the specific preload level (Light / Class B).
71916 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement of two bearings creates a robust, statically determinate system that significantly increases moment stiffness and resists operational deflection, ensuring precise shaft positioning.
- Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 12,578 lbf, this bearing is engineered to manage substantial combined radial and axial loads from both directions effectively.
- High-Speed Performance: The lightweight phenolic cage (C) reduces centrifugal forces, while the precision P4A tolerance class ensures smooth operation, enabling a high limiting speed of 28,000 rpm.
- Precision & Accuracy: Manufactured to ultra-precise P4A tolerances with a narrow bore and OD tolerance of -0.004mm to 0, this bearing guarantees minimal runout and exceptional rotational accuracy for critical applications.
- Material Integrity: Constructed from chrome steel for both rings and balls, providing high durability, wear resistance, and a long operational lifespan under demanding conditions.
71916 ACD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing set is ideally suited for applications requiring maximum rigidity and accuracy, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and Robotic Actuators.
- High-Frequency Motors and Spindles.
- Medical Equipment such as dental handpieces and imaging scanners.
- Aerospace & Defense Systems including gyroscopes and navigation instruments.
