S71916 ACD/P4ADBC
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71916 ACD/P4ADBC
Basic Information
System of measurement
Metric
Weight
0.76 kg
Tolerance class
P4A
Seal type
Sealed
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
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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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S71916 ACD/P4ADBC Bearing Product Overview & Core Advantages
The S71916 ACD/P4ADBC is a precision duplex back-to-back angular contact ball bearing designed for applications requiring exceptional rigidity and rotational accuracy. This matched bearing set features a P4A tolerance class for superior running accuracy and a moderate preload (Class C) for immediate operational stability. Its primary advantage lies in its ability to handle combined radial and axial loads simultaneously, making it an ideal solution for high-precision, high-rigidity spindles and other demanding machinery where precise shaft positioning is critical.
S71916 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
The model code S71916 ACD/P4ADBC provides detailed technical specifications:
- S7: Indicates a high-precision bearing series.
- 1916: Denotes the size series; 19 for the series and 16 for a 80 mm bore diameter.
- AC: Signifies a 25° contact angle, optimized for carrying axial loads.
- D: Represents the Duplex Back-to-Back (DB) arrangement, which provides high moment rigidity.
- P4A: Specifies the tolerance class, indicating very high dimensional and running accuracy.
- DBC: This suffix combination typically refers to the specific preload and internal clearance for the matched set. In this case, it confirms the moderate preload (Class C).
S71916 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) arrangement of the two bearings creates a wide effective spread, significantly increasing the system's resistance to moment loads and providing exceptional operational stiffness.
- Superior Load Capacity: With a 25° contact angle and robust construction, this bearing set efficiently supports combined radial and axial loads from both directions, ensuring reliable performance under complex loading conditions.
- Precision & High-Speed Operation: Manufactured to a P4A tolerance class, it guarantees minimal runout and smooth operation. The phenolic resin cage is lightweight and strong, contributing to stable performance at the specified limiting speed of 28,000 rpm.
- Sealed & Pre-Lubricated: The bearing is sealed and pre-lubricated with grease, offering protection against contamination and providing long-term, maintenance-free operation within the specified temperature range.
S71916 ACD/P4ADBC Bearing Typical Application Areas
This high-precision duplex bearing set is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motors.
- Industrial Pumps and Compressors requiring high axial stiffness.
- Medical Equipment and Aerospace Instrumentation demanding utmost accuracy.
