708 ACDGC/P4A
Miniature Super Precision Angular Contact Ball Bearings
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708 ACDGC/P4A Bearing Product Overview & Core Advantages
The 708 ACDGC/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring superior rotational accuracy and rigidity. Operating under a P4A tolerance class, it delivers exceptional dimensional and running accuracy. Its 25° contact angle is optimized to support significant combined loads, effectively managing both radial and axial forces in one direction. Preloaded to a Moderate / Class C level, it ensures minimal axial play and high system stiffness right from installation. The bearing is universally matchable (SU), allowing for precise axial clearance adjustment when mounted in pairs. This combination of precision, preload, and matching capability makes it ideal for high-speed spindles and other demanding machinery.
708 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 708 ACD | Basic bearing series designation with specific internal geometry. |
| G | Indicates a Moderate / Class C preload applied to the bearing, providing high rigidity and defined running torque. |
| C | Specifies a 25° contact angle, balancing radial and axial load capacity. |
| /P4A | Denotes an extremely high tolerance class, exceeding ABEC 7 standards for superior dimensional and running accuracy. |
708 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row angular contact design, combined with a Class C preload, eliminates internal clearance, resulting in a very stiff bearing unit that is critical for applications requiring high positional accuracy and minimal deflection under load.
- Optimized Load Capacity: The 25° contact angle is engineered to handle substantial combined loads, making it suitable for applications where both radial and axial forces are present.
- High-Speed Performance: The lightweight phenolic resin cage ensures excellent stability and low friction at high rotational speeds, contributing to the bearing's impressive limiting speed of 110,000 rpm. The open design and factory-applied lubrication facilitate efficient heat dissipation.
- Universal Matching Capability (SU): This feature allows two identical 708 ACDGC/P4A bearings to be mounted together in a back-to-back (DB) or face-to-face (DF) arrangement to support axial loads in both directions, providing design flexibility for complex spindle configurations.
708 ACDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Drives: High-frequency motors and servo drives.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and navigation instruments.
- Medical Equipment: Dental handpieces and small, high-speed surgical tools.
