71910 CD/P4ADFA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 CD/P4ADFA
Basic Information
System of measurement
Metric
Weight
0.26 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4972 lbf
Radial static load rating
4680 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Face-to-Face (DF)
Number of bearings in matched set
2
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
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71910 CD/P4ADFA Bearing Product Overview & Core Advantages
The 71910 CD/P4ADFA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This metric system bearing features a Face-to-Face (DF) matched arrangement and an Extra Light (Class A) preload, making it ideal for high-speed spindles and other precision machinery. Its core advantages include superior running accuracy due to its P4A tolerance class, high rigidity from its duplex configuration, and excellent performance under combined radial and axial loads.
71910 CD/P4ADFA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71910 CD/P4ADFA is decoded as follows:
- 71910: Basic series designation for a high-precision angular contact ball bearing.
- C: Indicates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Signifies a Duplex (two bearings in a set) configuration.
- P4A: Denotes a very high precision tolerance class, exceeding ABEC 7 standards, ensuring minimal runout and vibration.
- DF: Specifies the Face-to-Face mounting arrangement, which provides good moment load capacity and stability.
- A: Indicates the Extra Light preload level, which minimizes friction and heat generation at high speeds.
71910 CD/P4ADFA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex DF arrangement creates a rigid bearing system capable of withstanding significant combined radial and axial loads and moment loads, ensuring stable shaft positioning.
- High-Speed Performance: The 15° contact angle and light preload are engineered for high-speed applications, with a limiting speed of 46,000 rpm. The phenolic resin cage offers low weight and excellent performance at high rotational speeds.
- Exceptional Precision: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees superior running accuracy and low vibration.
- Premium Materials: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and a long operational lifespan.
71910 CD/P4ADFA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Aerospace & Defense Instrumentation
