71913 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71913 ACD/P4ADBC
Basic Information
System of measurement
Metric
Weight
0.42 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7178 lbf
Radial static load rating
7200 lbf
Limiting speed
36 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71913 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71913 ACD/P4ADBC is a precision angular contact ball bearing designed for demanding applications requiring high rigidity and exceptional running accuracy. As a duplex back-to-back (DB) arrangement, this pre-matched pair is engineered to withstand combined loads, including significant radial loads and bidirectional axial loads. Manufactured to P4A tolerance class, it offers superior dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery where high rigidity and operational reliability are critical.
71913 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two single bearings supplied as a matched set). |
| DB | Back-to-Back mounting arrangement. |
| P4A | High-Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards. |
71913 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and provides exceptional stability. This configuration enables the bearing set to handle significant combined radial and axial loads from both directions.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with a 25° contact angle, this bearing ensures low vibration and minimal runout. The lightweight phenolic cage and optimized internal geometry contribute to lower friction and stable operation at the limiting speed of 36,000 rpm.
- Optimized Internal Design: The bearing features 26 high-grade chrome steel balls of 7.938 mm diameter, precisely guided by the phenolic cage. This ensures smooth rotation, excellent acceleration capability, and consistent performance.
- Pre-lubricated & Ready-to-Install: Supplied as a pre-lubricated and pre-adjusted matched set, the 71913 ACD/P4ADBC simplifies installation, reduces setup time, and guarantees optimal preload for immediate, high-performance operation.
71913 ACD/P4ADBC Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for applications requiring high speed, rigidity, and accuracy, such as:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Machining Spindles
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Industrial Robotics and Precision Rotary Axes
