S71916 ACD/P4AQBTB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71916 ACD/P4AQBTB
Basic Information
System of measurement
Metric
Weight
1.51 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
64 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
20340 lbf
Radial static load rating
32850 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Quadruplex Tandem Back-to-Back (QBT)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Light / Class B
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/P4AQBTB Bearing Product Overview & Core Advantages
The S71916 ACD/P4AQBTB is a super-precision angular contact ball bearing designed for the most demanding applications. This quadruplex matched set in a Tandem Back-to-Back (QBT) arrangement delivers exceptional system rigidity and axial load capacity. Manufactured to P4A tolerance class, it guarantees ultra-high running accuracy, making it ideal for high-speed spindles and other precision machinery where superior performance and reliability are critical.
S71916 ACD/P4AQBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71916 | Basic bearing designation: 71916 series, 80mm bore, 110mm OD, 16mm width. |
| ACD | Contact angle of 25°. |
| P4A | High-precision tolerance class, superior to ABEC 7/ISO P4. |
| QBTB | Quadruplex (4 bearings) matched set in a Tandem Back-to-Back (QBT) arrangement. |
S71916 ACD/P4AQBTB Bearing Structural Features & Performance Benefits
- Unmatched Rigidity & Load Capacity: The quadruplex QBT arrangement creates an extremely rigid bearing system capable of supporting heavy combined loads, including significant radial and bidirectional axial loads.
- High-Speed Capability: The lightweight, high-strength phenolic cage and optimized internal geometry contribute to a high limiting speed of 28,000 rpm, minimizing centrifugal forces and friction.
- Precision & Longevity: Manufactured to P4A tolerances from high-grade chrome steel, this bearing ensures minimal runout and vibration for superior positional accuracy and extended service life.
- Sealed & Pre-Lubricated: The sealed design and factory-applied grease lubrication protect against contamination and provide reliable operation within a temperature range of -30°C to 110°C, reducing maintenance needs.
- Light Preload (Class B): The set is supplied with a light preload, eliminating internal clearance for precise shaft positioning and enhanced dynamic stiffness.
S71916 ACD/P4AQBTB Bearing Typical Application Areas
This precision bearing set is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and high-frequency motor spindles.
- High-Speed Automation: Robotics, direct-drive systems, and precision positioning stages.
- Medical & Aerospace Equipment: Applications requiring extreme accuracy and reliability.
