71900 CDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71900 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.009 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 mm
Outside diameter tolerance
-0.004mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
565 lbf
Radial static load rating
248 lbf
Limiting speed
165 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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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71900 CDGB/P4A Bearing Product Overview & Core Advantages
The 71900 CDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing that is Universal Matchable (SU), it is engineered to be paired with a second, identical bearing to form a precisely preloaded set, offering superior system rigidity. Its key characteristics include a P4A tolerance class for ultra-precise running accuracy, a light preload (Class B) for optimal stiffness in high-speed operations, and a 15° contact angle to effectively handle combined radial and axial loads. This compact bearing is the ideal solution for high-reliability, high-precision spindles and machinery.
71900 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71900 CDGB/P4A is decoded as follows:
- 71900: The basic bearing designation, indicating a super-precision, miniature angular contact bearing series with a 10mm bore.
- C: Signifies a 15° contact angle.
- D: Indicates the bearing is supplied as a Universal Matchable (SU) pair. Two bearings are supplied to be mounted in a face-to-face or back-to-back arrangement.
- G: Specifies a light preload (Class B).
- B: Denotes a phenolic (synthetic resin) cage.
- P4A: The tolerance class, denoting a level of precision superior to ABEC 7, with very tight tolerances on bore, outside diameter, and width.
71900 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class standards, this bearing ensures minimal runout and vibration. The light preload eliminates internal clearance, providing immediate and high system rigidity for superior machining finish and positional accuracy.
- Optimized for High-Speed Operation: The lightweight phenolic cage is engineered for stability and low friction at very high rotational speeds, contributing to the bearing's high limiting speed of 165,000 rpm. The 15° contact angle provides an excellent balance between radial load capacity and axial load capacity for high-speed applications.
- Superior Load Capacity: The bearing's internal geometry and high-grade chrome steel construction enable it to handle significant combined loads (simultaneous radial and axial forces), as evidenced by its dynamic and static load ratings.
- Universal Matching Design: The Universal Matchable (SU) feature allows two identical bearings to be paired without selective matching, simplifying installation and ensuring consistent, predictable preload and performance in duplex sets.
71900 CDGB/P4A Bearing Typical Application Areas
The 71900 CDGB/P4A is critical in high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles: For precision grinding, milling, and drilling.
- Precision Robotics: In high-accuracy joints and arm linkages.
- Medical and Dental Equipment: Such as high-speed handpieces and scanners.
- Aerospace Gyroscopes and Instrumentation: Where reliability and precision are non-negotiable.
- High-Frequency Spindles for PCB Drilling: Demanding extreme rotational accuracy.
