71926 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71926 ACD/P4ADBC
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
7.5 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
No drawings available at the moment, will be launched soon
In Stock
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71926 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71926 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement is preloaded to provide high rigidity and superior stability under combined loads, including significant radial and axial forces. Manufactured to P4A tolerance class, it ensures minimal runout and is ideal for high-speed, high-precision machinery where reliability is critical.
71926 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for combined loads. |
| P4A | High precision tolerance class with enhanced running accuracy requirements. |
| DB | Duplex Back-to-Back arrangement, providing high moment rigidity and stability. |
71926 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back duplex configuration and moderate preload (Class C) create a highly rigid bearing system that effectively resists moment loads and shaft deflection.
- Superior Load Capacity: The 25° contact angle and optimized internal geometry enable the bearing to handle substantial combined radial and axial loads simultaneously.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 7,500 rpm. The open design facilitates efficient lubrication management.
- Precision Performance: Manufactured to P4A tolerance standards with tight dimensional control on the bore diameter, outside diameter, and width, ensuring smooth, precise operation in demanding applications.
71926 ACD/P4ADBC Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications such as:
- Machine Tool Spindles (milling, grinding)
- High-Speed Precision Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
