709 ACD/P4ADGB
Miniature Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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709 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 709 ACD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered with a 25° contact angle and P4A tolerance class, this bearing excels at handling combined radial and axial loads simultaneously. Its universal matchable (SU) design allows for flexible mounting arrangements in preloaded pairs, delivering high rigidity and precise rotational performance. The phenolic cage and optimized internal geometry contribute to its suitability for high-speed operation up to 220,000 rpm, making it ideal for demanding precision machinery.
709 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACD | 25° Contact Angle Design | Optimized for axial load capacity and moment load resistance |
| P4A | High Precision Tolerance Class | Superior running accuracy and minimal vibration for precision applications |
| DGB | Universal Matchable (SU) Pairing | Enables preloaded arrangements for enhanced system rigidity |
709 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with 25° contact angle provides excellent resistance to combined loads, while the universal matchable feature allows for back-to-back or face-to-face mounting to create highly rigid bearing systems.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for applications requiring exceptional rotational accuracy.
High-Speed Capability: The phenolic cage and optimized internal geometry enable stable operation at limiting speeds of 220,000 rpm, while the 10 precision balls (Ø3.969mm) provide smooth rotation under high centrifugal forces.
Material Excellence: Constructed from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and durability across a temperature range of -30°C to 110°C.
709 ACD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- Precision Instrumentation - Measuring devices and optical equipment requiring minimal vibration
- High-Speed Motors - Servo motors and spindle drives demanding accurate rotation
- Medical Equipment - Dental handpieces and laboratory instrumentation
- Robotics - Precision joints and rotary actuators requiring high rigidity
