708 ACE/P4A
Miniature Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
708 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.012 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
8 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 mm
Outside diameter tolerance
-0.005mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
8
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
515 lbf
Radial static load rating
172 lbf
Limiting speed
150 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:
$ 103.15
/ each
In Stock
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708 ACE/P4A Bearing Product Overview & Core Advantages
The 708 ACE/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to P4 (ABEC-7) tolerance class, this bearing is optimized to handle significant combined loads, accommodating both radial and axial loads in one direction. Its compact design, featuring a 7mm width, makes it ideal for space-constrained, high-speed assemblies. The phenolic cage and preload capability contribute to its high-speed performance and operational stability, making it a reliable choice for demanding technical environments.
708 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 for high precision. |
| P4A | Denotes a P4 (ABEC-7) tolerance class and "A" signifies a specific preload or internal clearance group for high rigidity. |
708 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with a 25° contact angle, this bearing provides superior running accuracy and stiffness, essential for applications with minimal deflection requirements.
- Optimized Load Capacity: The angular contact design efficiently supports combined radial and axial loads. With a dynamic load rating of 515 lbf and static load rating of 172 lbf, it offers reliable performance under significant stress.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 150,000 rpm. This makes it suitable for very high-speed spindles and rotors.
- Preload Capability: The availability of preload allows for precise control over bearing internal clearance, resulting in increased system rigidity and reduced vibration in the final application.
708 ACE/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Medical and Dental Handpiece Drives
- Aerospace Instrumentation and Gyroscopes
