71908 ACE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71908 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.1 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
62 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
6.35 mm
Ball quantity
19
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2106 lbf
Radial static load rating
1282 lbf
Limiting speed
44 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:
$ 86.98
/ each
In Stock
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71908 ACE/P4A Bearing Product Overview & Core Advantages
The 71908 ACE/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior performance under combined loads. Engineered to a P4 (ABEC-7) tolerance class, it offers exceptional running accuracy. Its key advantage lies in its ability to accommodate significant axial loads in one direction in addition to radial loads, making it ideal for high-speed spindles and precision machinery where rigidity and rotational accuracy are critical.
71908 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| ACE | Indicates a specific internal design with a 25° contact angle and optimized internal geometry for high-speed operation. |
| P4A | Denotes a high-precision tolerance class equivalent to ABEC-7. The 'A' suffix often indicates specific tolerance deviations for the bore and outside diameter. |
71908 ACE/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance with a 25° contact angle, this bearing provides excellent running accuracy and system stiffness, minimizing deflection under load.
- Superior Load Capacity: The angular contact design is optimized to handle combined radial and axial loads simultaneously, with a high dynamic load rating of 2106 lbf.
- High-Speed Capability: The lightweight phenolic resin cage ensures stable operation and low friction, contributing to a high limiting speed of 44,000 rpm.
- Pre-lubricated & Ready-to-Use: The bearing comes lubricated from the factory, ensuring immediate performance and simplifying installation.
- Open Design: The open seal type allows for customized lubrication regimes and is suitable for applications where heat dissipation is a priority.
71908 ACE/P4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Speed Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace Control Systems
- Medical and Dental Equipment
