71932 CD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71932 CD/P4ADBB
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
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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71932 CD/P4ADBB Bearing Product Overview & Core Advantages
The 71932 CD/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement provides superior stability and can accommodate combined radial and axial loads simultaneously. Manufactured to P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and other precision machinery where uncompromising performance is critical.
71932 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71932 | Basic bearing series, indicating a high-precision angular contact bearing with a 160mm bore. |
| C | 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Duplex bearing (a pre-mounted set of two bearings). |
| P4A | Tolerance class exceeding ABEC 7/ISO P4, with enhanced width and runout tolerances for superior precision. |
| DB | Back-to-Back arrangement, providing high moment rigidity and excellent stability under complex loading conditions. |
| B | Light preload (Class B), reducing axial and radial play for improved stiffness and positioning accuracy. |
71932 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise alignment under heavy combined loads.
- Optimized Load Capacity: The 15° contact angle and generous ball quantity (28) provide a balanced capacity for both high radial and axial loads.
- Superior High-Speed Performance: The lightweight, durable phenolic cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 11,000 rpm. The open design allows for efficient lubrication management.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing guarantees exceptional running accuracy and low vibration levels.
- Premium Materials: Constructed from chrome steel for both rings and balls, ensuring high hardness, wear resistance, and long service life.
71932 CD/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling heads.
- High-Speed Motors & Spindles: Where precision, rigidity, and high rotational speeds are paramount.
- Precision Equipment: Measuring instruments, rotary tables, and optical scanners.
- Pumps & Compressors: For applications requiring reliable operation under significant axial and radial forces.
