708 ACDGB/P4A
Miniature Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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708 ACDGB/P4A Bearing Product Overview & Core Advantages
The 708 ACDGB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, it delivers superior running accuracy and dimensional stability. Its key advantage lies in its ability to support combined loads (radial and axial) efficiently in one direction, making it ideal for high-speed spindles and precision machinery. The universal matching (SU) design allows two bearings to be mounted in a back-to-back or face-to-face arrangement to handle complex load conditions, while the phenolic cage ensures smooth operation at high speeds.
708 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
- 708: Basic bearing series designation.
- AC: Angular Contact design, optimized for combined loads.
- D: Light preload (Class B), providing high rigidity and minimal axial play.
- GB: Universal Matchable (SU), indicating the bearing is ground for universal pairing (back-to-back or face-to-face).
- P4A: High-Precision Tolerance Class, exceeding ABEC-7 standards for exceptional dimensional and running accuracy.
708 ACDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The 25° contact angle and light preload (Class B) provide high system rigidity and precise shaft positioning, critical for machine tool spindles and other high-precision applications. The P4A tolerance class ensures minimal runout and vibration.
Optimized for High-Speed Operation: The lightweight phenolic resin cage reduces centrifugal forces, enabling stable performance at the limiting speed of 110,000 rpm. The cage design and optimized internal geometry contribute to lower friction and heat generation.
Superior Load Capacity: With a dynamic load rating of 718 lbf and a static load rating of 302 lbf, this bearing is engineered to handle significant combined radial and axial loads.
Universal Matching Capability: The Universal Matchable (SU) feature allows for simplified mounting of pre-adjusted bearing pairs, reducing assembly time and ensuring optimal preload and performance in matched sets.
708 ACDGB/P4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors
- Dental Handpieces
- Aerospace Instrumentation
- Robotic Arm Joints
