71906 CD/P4ATFTC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71906 CD/P4ATFTC
Basic Information
System of measurement
Metric
Weight
0.14 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
27 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3442 lbf
Radial static load rating
3082 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Face-to-Face (TFT)
Number of bearings in matched set
3
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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Product Overview and Core Advantages
The 71906 CD/P4ATFTC is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and running accuracy. As part of a matched triplex set in a face-to-face arrangement, this bearing is engineered to handle combined radial and axial loads simultaneously. Manufactured to P4A tolerance class and featuring a moderate preload (Class C), it delivers high rotational precision, excellent operational stability, and is ideally suited for high-speed spindles and other precision machinery.
71906 CD/P4ATFTC Bearing Model Code Explained, Specifications & Naming Convention
The model number 71906 CD/P4ATFTC provides detailed technical specifications:
- 71906: Basic bearing series, indicating a light-weight, high-precision angular contact design with a 30mm bore.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates the bearing is part of a universally matched set for specific preload and performance characteristics.
- P4A: The tolerance class, signifying very high precision for inner and outer ring runouts and width tolerances.
- TFT: Specifies the Triplex Face-to-Face arrangement of the three-bearing set, providing high system rigidity and moment load capacity.
- C: Indicates the moderate preload (Class C) applied to the matched set for optimal stiffness and performance.
Structural Features and Performance Benefits
- High Rigidity and System Stability: The triplex face-to-face (TFT) arrangement of three matched bearings creates an exceptionally rigid support system, effectively resisting complex moment loads and ensuring precise shaft positioning.
- Superior Precision and Speed: Built to P4A tolerance class and featuring a lightweight phenolic resin cage, this bearing achieves very low vibration levels and a high limiting speed of 100,500 rpm, making it ideal for high-speed applications.
- Optimized Load Capacity: The 15° contact angle design provides a balanced capacity for both radial and axial loads, with a dynamic load rating of 3442 lbf and a static load rating of 3082 lbf.
- Pre-Configured Performance: The bearings are supplied as a matched set with moderate preload, eliminating the need for complex on-site adjustment and ensuring consistent, reliable performance from installation.
71906 CD/P4ATFTC Bearing Typical Application Areas
This high-precision bearing set is primarily used in:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring extreme running accuracy and minimal runout.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Medical and Dental Equipment: High-speed handpieces and precision rotary tools.
- Aerospace Instrumentation: Gyroscopes and other precision navigation systems.
