71932 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71932 CD/P4ADGB
Basic Information
System of measurement
Metric
Weight
5.4 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
160 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
220 mm
Outside diameter tolerance
-0.004mm to 0
Width
56 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
47700 lbf
Radial static load rating
72000 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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71932 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71932 CD/P4ADGB is a precision angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. As a universally matchable (SU) bearing supplied in a light preload (Class B) duplex set, it excels at handling combined loads—simultaneously supporting significant radial and axial forces. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and other demanding machinery where high rigidity and minimal runout are critical.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71932 | Basic bearing series, indicating a high-precision angular contact design with a 160mm bore. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a universally matchable (SU) duplex set. Two bearings can be paired in any combination (DB, DF, DT) to achieve the required preload and stiffness. |
| P4A | Denotes an ultra-precision tolerance class, exceeding ABEC 7/ISO P4 standards, for exceptional dimensional and running accuracy. |
| DGB | Signifies a light preload (Class B) applied to the duplex set, reducing axial and radial play for enhanced system rigidity without excessive heat generation. |
71932 CD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex set configuration and 15° contact angle create a highly rigid bearing system capable of withstanding combined radial and axial loads. The phenolic cage distributes loads evenly, contributing to stable operation under demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic cage and optimized internal geometry, including a 19.05 mm ball diameter and 28 balls, enable a high limiting speed of 11,000 rpm. This makes it suitable for high-speed spindle applications.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing ensures minimal vibration and precise shaft positioning, which is critical for achieving high surface finishes and machining accuracy.
- Universal Matchability (SU): This feature provides exceptional flexibility in mounting. The two bearings in the set can be arranged in tandem (DT), back-to-back (DB), or face-to-face (DF) configurations to optimize performance for specific load and moment requirements.
71932 CD/P4ADGB Bearing Typical Application Areas
The 71932 CD/P4ADGB is engineered for high-precision, high-speed machinery. Its primary applications include:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling spindles requiring high rigidity and speed.
- Precision Industrial Pumps & Compressors: Where reliable operation under combined loads is essential.
- High-Speed Automation & Robotics: Rotary tables, robot arm joints, and other precision motion control systems.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
