71916 ACD/P4AQBTB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71916 ACD/P4AQBTB
Basic Information
System of measurement
Metric
Weight
1.48 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
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
17 X 1000 rpm
Lubrication
Lubricated
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
Price available upon request.
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71916 ACD/P4AQBTB Bearing Product Overview & Core Advantages
The 71916 ACD/P4AQBTB is a super-precision angular contact ball bearing designed for the most demanding applications. Its core advantage lies in its matched quadruplex tandem back-to-back (QBT) arrangement, which provides exceptional system rigidity and the ability to handle complex combined loads. Manufactured to the stringent P4A tolerance class, this bearing ensures high running accuracy and is optimized for high-speed operation, making it an ideal choice for machine tool spindles and other high-performance machinery.
71916 ACD/P4AQBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71916 | Basic bearing series and size designation. |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates a super-precision tolerance class for high running accuracy. |
| QBTB | Specifies a Quadruplex (4 bearings) Tandem Back-to-Back matched set with Light preload (Class B). |
71916 ACD/P4AQBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The quadruplex tandem back-to-back arrangement creates an extremely rigid bearing system capable of supporting significant combined radial and axial loads from both directions.
- Super-Precision Performance: The P4A tolerance class ensures minimal runout and vibration, which is critical for applications requiring high positional accuracy and smooth operation.
- Optimized High-Speed Capability: The phenolic cage offers low weight and excellent performance at high speeds, contributing to the bearing's high limiting speed.
- Preload & Stability: The set is supplied with a light preload (Class B), eliminating internal clearance to enhance shaft rigidity and system stability under operational conditions.
71916 ACD/P4AQBTB Bearing Typical Application Areas
This precision bearing is engineered for high-performance machinery where utmost accuracy and rigidity are paramount. Key applications include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Gearboxes
- High-Frequency Motors
- Aerospace & Defense Systems
