71932 CD/P4ATBTB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71932 CD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
8.1 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
84 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
63225 lbf
Radial static load rating
108000 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
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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71932 CD/P4ATBTB Bearing Product Overview & Core Advantages
The 71932 CD/P4ATBTB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set delivers superior performance under combined loads, handling significant radial and axial forces simultaneously. Manufactured to P4A tolerance class, it ensures high running accuracy and is preloaded for optimal stiffness right out of the box. Its phenolic cage and optimized design contribute to excellent high-speed performance, making it ideal for high-precision, high-rigidity spindles and machinery.
71932 CD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71932 | Basic bearing series and size designation (160mm bore, 220mm OD). |
| CD | Specifies a 15° contact angle and optimized internal geometry for high-speed operation. |
| P4A | Indicates a high-precision tolerance class with enhanced dimensional and running accuracy. |
| TBT | Denotes a Triplex Back-to-Back matched arrangement of three bearings, providing maximum rigidity against moment loads. |
71932 CD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The triplex back-to-back (TBT) arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads and moment loads, ensuring minimal shaft deflection under operation.
- Precision & High-Speed Performance: Built to P4A tolerance class with a 15° contact angle and a lightweight phenolic cage, this bearing achieves smooth operation and a high limiting speed of 11,000 rpm.
- Optimized Internal Design: Features 28 precision balls made of chrome steel, contributing to the high dynamic and static load ratings (63,225 lbf / 108,000 lbf) and long service life.
- Preloaded for Immediate Use: Supplied as a light preload (Class B) matched set, eliminating the need for complex adjustment during installation and ensuring immediate, stable performance.
71932 CD/P4ATBTB Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Industrial Pumps & Compressors: Applications requiring robust axial and radial load support.
