71926 ACD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71926 ACD/P4ADBB
Basic Information
System of measurement
Metric
Weight
3.1 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
130 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
180 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
31500 lbf
Radial static load rating
45900 lbf
Limiting speed
11 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
No drawings available at the moment, will be launched soon
Price:
$ 1563.55
/ each
In Stock
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71926 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 71926 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair is preloaded to Light / Class B specifications, ensuring minimal axial and radial play for superior system stability. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads from both directions—simultaneously. Manufactured to ABEC 7 / P4A tolerance class, it is an ideal solution for high-speed, high-precision machinery where uncompromising performance is critical.
71926 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71926 | Basic bearing series, indicating a high-precision angular contact bearing with a 130mm bore, 180mm OD, and 48mm width. |
| AC | Angular Contact design with a 25° contact angle, optimized for carrying combined loads. |
| D | Duplex (Two bearings supplied as a matched set). |
| P4A | High-Precision Tolerance Class equivalent to ABEC 7, with enhanced running accuracy requirements. |
| DBB | Duplex Back-to-Back arrangement. This configuration provides high moment rigidity and is best suited for applications with overturning moments. |
71926 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The back-to-back (DBB) duplex arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise alignment and positioning.
- Superior Load Capacity: The 25° contact angle and duplex design enable the bearing to support high combined radial and axial loads from both directions simultaneously.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with a phenolic resin cage, this bearing offers excellent dimensional stability, reduced vibration, and smooth operation at high rotational speeds, with a limiting speed of 11,000 rpm.
- Optimized Material & Construction: Made from chrome steel for both rings and balls, the bearing ensures high durability and fatigue resistance. The phenolic cage is lightweight and performs well under high centrifugal forces.
- Preloaded & Ready-to-Install: Supplied as a preloaded matched set, the bearing eliminates internal clearance, simplifying installation and ensuring immediate, optimal performance without the need for complex adjustment.
71926 ACD/P4ADBB Bearing Typical Application Areas
This precision duplex bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: For milling, grinding, and turning centers requiring high speed, rigidity, and accuracy.
- High-Frequency Motors & Spindles: Used in applications where rapid acceleration and deceleration are common.
- Precision Gearboxes & Transmission Systems: To support shafts subjected to significant radial, axial, and moment loads.
- Industrial Pumps and Compressors: Where reliable operation under combined loading is essential.
- Robotics and Automation: In high-accuracy rotary joints and arm assemblies.
