708 ACD/P4ADGB
Miniature Super Precision Angular Contact Ball Bearings
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708 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 708 ACD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Engineered with a 25° contact angle and manufactured to P4A tolerance class, this bearing excels at handling combined loads (simultaneous radial and axial loads). Its universal matchable (SU) design allows two bearings to be paired in a back-to-back or face-to-face arrangement, providing superior system rigidity and operational stability in high-precision machinery.
708 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Advantage |
|---|---|---|
| ACD | 25° Contact Angle, Universal Matchable Design | Optimized for combined loads and flexible mounting configurations |
| P4A | High Precision Tolerance Class | Ensures minimal runout and vibration for precision applications |
| DGB | Light Preload (Class B) | Reduces deflection under load, enhancing system rigidity and positioning accuracy |
708 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with a 25° contact angle enables the bearing to efficiently support significant axial loads in one direction along with radial loads. The universal matchable pairing of two bearings creates a pre-stressed system that delivers exceptional stiffness, minimizing shaft deflection under combined loads.
High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly at high rotational speeds, contributing to the bearing's limiting speed of 110,000 rpm. This makes it suitable for demanding high-speed spindle applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the 8 mm bore and 22 mm outside diameter, this bearing ensures precise shaft positioning and minimal vibration, which is critical for maintaining accuracy in machining and instrumentation.
708 ACD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles
- Precision Instrumentation: Measuring devices, optical scanners
- High-Speed Motors: Servo motors, spindle motors
- Robotics: Precision joints and arm assemblies
