71906 ACB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71906 ACB/P4A
Basic Information
System of measurement
Metric
Weight
0.047 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
22
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1040 lbf
Radial static load rating
675 lbf
Limiting speed
56 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:
$ 235.67
/ each
In Stock
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71906 ACB/P4A Bearing Product Overview & Core Advantages
The 71906 ACB/P4A is a single-row angular contact ball bearing designed for applications requiring high precision and high-speed operation. Engineered to a P4 (ABEC-7) tolerance class, it excels in handling combined loads, primarily thrust loads in one direction, with a 25° contact angle optimizing axial load capacity. Its compact design, featuring a 9 mm width, makes it ideal for space-constrained, high-reliability assemblies where precision and speed are critical.
71906 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71906 ACB/P4A is decoded as follows:
- 71906: Denotes the bearing series and size (30mm bore, 47mm OD).
- AC: Angular Contact design.
- B: Indicates a 40° contact angle (Note: Specification sheet indicates 25°. The "B" suffix may refer to a specific internal design or preload class. Please consult manufacturer for exact interpretation).
- P4A: Specifies the P4 tolerance class (ABEC-7) and likely includes additional manufacturing or selection criteria ("A").
71906 ACB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 (ABEC-7) standards with tight dimensional tolerances, ensuring precise shaft positioning and system rigidity. The phenolic resin cage provides high strength with minimal weight, contributing to smooth operation at high speeds.
- Optimized Load Capacity: The 25° contact angle is engineered to support significant one-direction axial loads and combined (radial and axial) loads efficiently.
- Superior High-Speed Performance: The lightweight phenolic cage and optimized internal geometry enable a high limiting speed of 56,000 rpm, making it suitable for demanding spindle and motor applications.
- Pre-Lubricated & Ready for Use: The bearing comes lubricated from the factory, ensuring immediate performance and simplifying the installation process.
71906 ACB/P4A Bearing Typical Application Areas
This high-precision, high-speed angular contact ball bearing is ideally suited for:
- Machine Tool Spindles
- High-Frequency Electric Motors
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Aerospace Instrumentation and Control Systems
