71934 CD/P4ATBTA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71934 CD/P4ATBTA
Basic Information
System of measurement
Metric
Weight
8.55 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
170 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
230 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
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
64350 lbf
Radial static load rating
112500 lbf
Limiting speed
16.25 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
Extra light / Class A
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
Price available upon request.
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71934 CD/P4ATBTA Bearing Product Overview & Core Advantages
The 71934 CD/P4ATBTA is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This triplex matched set in a back-to-back (TBT) arrangement provides superior stiffness and stability, enabling it to handle combined loads (radial and axial) simultaneously. Manufactured to P4A tolerance class with an extra light preload (Class A), it is engineered for high-precision machinery requiring minimal runout and smooth operation under demanding conditions.
71934 CD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Contact angle of 15° and high-precision construction. |
| P4A | Indicates a super-precision tolerance class with enhanced dimensional and running accuracy requirements. |
| TBT | Specifies the bearing set as a Triplex Back-to-Back matched arrangement. |
| A | Denotes an Extra Light Preload (Class A) applied to the matched set, reducing deflection and vibration. |
71934 CD/P4ATBTA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back (TBT) configuration creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, crucial for maintaining precision in demanding applications.
- Superior Load Capacity: The 15° contact angle and triple-bearing setup provide excellent capacity for combined radial and axial loads, ensuring reliable performance under complex loading conditions.
- Precision & Smooth Operation: Manufactured to P4A tolerance class and featuring a lightweight phenolic cage, this bearing ensures minimal vibration and high running accuracy, contributing to a long service life.
- Optimized for High-Speed Applications: The combination of the phenolic cage, precision-ground components, and extra light preload allows for a high limiting speed of 16,250 rpm, making it suitable for high-speed spindles.
- Pre-lubricated for Immediate Use: The bearing is factory-lubricated, ensuring optimal performance from initial startup and simplifying the installation process.
71934 CD/P4ATBTA Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring extreme accuracy and surface finish quality.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Industrial Pumps & Compressors: For shafts requiring precise axial location and high rigidity.
