708 ACD/P4ADGA
Miniature Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
708 ACD/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.024 kg
Tolerance class
P4A
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
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
9
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1170 lbf
Radial static load rating
596 lbf
Limiting speed
110 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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708 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 708 ACD/P4ADGA is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a pre-lubricated matched pair, it delivers superior rigidity and can accommodate combined radial and axial loads simultaneously. Manufactured to P4A tolerance class with an Extra Light (A) preload, it is the ideal solution for high-precision spindles and other demanding machinery where minimal runout and high reliability are critical.
708 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 708 ACD | Basic bearing designation with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class for superior running accuracy. |
| DGA | Specifies a universal matchable (SU) bearing pair with Extra Light (A) preload. |
708 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and universally matched pair arrangement create a highly rigid bearing system capable of supporting significant combined radial and axial loads from both directions.
- Superior High-Speed Performance: The lightweight phenolic resin cage and optimized internal geometry contribute to a high limiting speed of 110,000 rpm, making it an excellent high-speed bearing.
- Precision Engineering: Manufactured to P4A tolerance class with strict dimensional control on the bore diameter, outside diameter, and width, ensuring minimal vibration and precise shaft positioning.
- Pre-Lubricated for Immediate Use: The bearing comes lubricated from the factory, ready for installation and immediate operation within its specified temperature range.
708 ACD/P4ADGA Bearing Typical Application Areas
This precision bearing is ideally suited for:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Medical and Dental Handpieces
- Aerospace Control Systems
