71910 ACB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 ACB/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
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
29
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1638 lbf
Radial static load rating
1350 lbf
Limiting speed
36 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:
$ 404.11
/ each
In Stock
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71910 ACB/P4A Bearing Product Overview & Core Advantages
The 71910 ACB/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating under P4 (ABEC-7) tolerance class, it is designed to accommodate high combined loads, primarily thrust loads in one direction, making it ideal for machine tool spindles and other high-speed machinery. Its compact design, phenolic resin cage, and pre-lubrication contribute to superior high-speed performance and operational reliability.
71910 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing designation, indicating a high-precision angular contact bearing series with a 50mm bore. |
| ACB | Specific internal design and contact angle (25°) optimized for high rigidity and precise operation. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific running accuracy requirements, denoting a precision bearing for demanding applications. |
71910 ACB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable the bearing to support significant combined radial and axial loads, providing stable and rigid support for spindles.
- Superior High-Speed Performance: The lightweight phenolic resin cage ensures minimal centrifugal forces and excellent dimensional stability at high speeds, contributing to a limiting speed of 36,000 rpm.
- Precision Engineering: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and vibration, which is critical for achieving high machining accuracy and surface finish quality.
- Optimized for Preload: The design is suitable for preload, which eliminates internal clearance, increases system stiffness, and enhances rotational accuracy.
71910 ACB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles (milling, grinding, and turning centers)
- High-Speed Motors and Spindles
- Precision Robotic Drives
- Medical and Dental Equipment
- Aerospace Control Systems
