707 ACDGA/P4A
Miniature Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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707 ACDGA/P4A Bearing Product Overview & Core Advantages
The 707 ACDGA/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and speed capability. Manufactured to P4A tolerance class, it delivers superior running accuracy for demanding machinery. Its key advantage lies in its ability to efficiently support combined loads (radial and axial loads in one direction) with high rigidity. The bearing comes pre-lubricated and is universally matchable (SU designation), allowing for precise axial preload control when mounted in pairs. This makes it an ideal, compact solution for high-speed spindles and other precision rotary systems.
707 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 707 | Boundary Dimension Series | Defines the compact 7x19x6 mm (Bore x OD x Width) size. |
| AC | Angular Contact | Optimized geometry for combined radial and axial loads. |
| DGA | Contact Angle & Preload | Specifies a 25° contact angle and Extra Light (Class A) preload for high-speed, low-friction operation. |
| P4A | Tolerance Class | Denotes a high-precision bearing with extremely tight dimensional and running accuracy tolerances. |
707 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High-Precision Construction: Manufactured to P4A standards with a bore and outside diameter tolerance of -0.004mm to 0, ensuring minimal runout and vibration for superior performance in precision applications.
- Optimized for High-Speed Operation: The combination of a phenolic resin cage, a 25° contact angle, and extra light preload enables a very high limiting speed of 170,000 rpm, making it a true high-speed bearing.
- Superior Rigidity and Load Capacity: The angular contact design provides high rigidity against moment loads. With a dynamic load rating of 544 lbf, it reliably handles significant combined loads.
- Universal Matching (SU): This bearing is universally matchable, meaning any two bearings can be paired together in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to support higher loads or achieve specific preload settings.
- High-Quality Materials: Constructed from chrome steel for rings and balls, ensuring high durability and long service life under demanding conditions.
707 ACDGA/P4A Bearing Typical Application Areas
The 707 ACDGA/P4A is engineered for high-performance applications where speed, precision, and reliability are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instrumentation: Measuring devices, optical scanners.
- High-Speed Motors and Drives: Servo motors, spindle drives.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments.
