71913 ACD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71913 ACD/P4ADBB
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
Light / Class B
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/P4ADBB Bearing Product Overview & Core Advantages
The 71913 ACD/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement provides superior stability and can accommodate combined radial and axial loads from both directions. Manufactured to P4A tolerance class and featuring a light preload (Class B), it ensures smooth, high-precision operation, making it ideal for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
71913 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact, Duplex arrangement. Specifically indicates a Back-to-Back (DB) mounting configuration. |
| P4A | High precision tolerance class, defining very tight dimensional and running accuracy standards for both inner and outer rings. |
| DBB | Duplex Back-to-Back. Confirms the specific matched set arrangement of two bearings. |
71913 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and provides exceptional operational stability, crucial for maintaining precision under heavy combined loads.
- Superior Load Capacity: With a 25° contact angle, this bearing is optimized to handle significant axial loads in both directions simultaneously with radial loads, offering versatile load-carrying capability.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel balls and raceways contribute to low friction and heat generation, supporting a high limiting speed of 36,000 rpm.
- Precision Engineering: Conforming to P4A tolerance class and featuring a light preload, this bearing ensures minimal vibration and precise shaft positioning, which is essential for applications requiring high rotational accuracy.
71913 ACD/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Where high rigidity and accurate shaft alignment are required.
- High-Frequency Motors and Spindles: Applications demanding minimal runout at high rotational speeds.
- Medical and Laboratory Equipment: Centrifuges and other precision rotary devices.
