71910 CB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 CB/P4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
29
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1755 lbf
Radial static load rating
1418 lbf
Limiting speed
38 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 404.44
/ each
In Stock
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71910 CB/P4A Bearing Product Overview & Core Advantages
The 71910 CB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to accommodate combined loads (radial and axial loads in one direction), this bearing features a 15° contact angle and is supplied with P4 (ABEC-7) precision tolerance. Its compact design, with a 50 mm bore and 12 mm width, makes it ideal for space-constrained, high-speed spindles and precision machinery where high rigidity and minimal runout are critical.
71910 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CB | Specific internal design with a 15° contact angle and modified internal clearance/geometry for optimized performance in universal matching arrangements. |
| P4A | Indicates P4 (ABEC-7) precision tolerance class for both bore and outside diameter, ensuring ultra-high running accuracy. |
71910 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The single-row angular contact design with a 15° contact angle provides excellent resistance to combined radial and axial loads, making it suitable for applications with significant thrust requirements.
- Precision Performance: Manufactured to P4 (ABEC-7) tolerance class with tight dimensional control (bore tolerance: -0.006mm to 0), ensuring minimal vibration and superior running accuracy for high-speed spindles.
- High-Speed Capability: The phenolic resin cage offers low weight and excellent high-speed stability, contributing to the bearing's limiting speed of 38,000 rpm.
- Optimized Material Selection: Components made from chrome steel provide high hardness, wear resistance, and durability under demanding operating conditions.
- Preload Availability: Designed to be used with preload, enabling increased system stiffness and precise shaft positioning.
71910 CB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines
- Precision Instrumentation: Measuring devices, optical scanners, and laboratory equipment
- High-Speed Motors: Servo motors, spindle motors, and turbochargers
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, centrifuges, and imaging systems
