S7008 ACD/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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S7008 ACD/P4ADGA Bearing Product Overview & Core Advantages
The S7008 ACD/P4ADGA is a precision double-row angular contact ball bearing designed for applications requiring exceptional accuracy and reliability. Engineered to simultaneously handle combined radial and bidirectional axial loads, this bearing features an extra light preload (Class A) and a P4A super-precision tolerance class. Its compact double-row design provides high rigidity and stable rotational characteristics, making it ideal for high-speed spindles and other demanding precision machinery where minimal runout and maximum performance are critical.
S7008 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
- S7008: Basic designation indicating a 40mm bore, 68mm OD double-row angular contact ball bearing
- A: Contact angle of 25 degrees
- C: Phenolic resin cage
- D: Universal Matchable (SU) design for paired mounting
- P4A: Super precision tolerance class exceeding ABEC 7 standards
- DGA: Sealed design with factory-applied grease
S7008 ACD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double-row angular contact design provides superior radial and axial stiffness, capable of handling combined loads in any direction. With a dynamic load rating of 5850 lbf and static load rating of 4680 lbf, it delivers reliable performance under demanding conditions.
Precision Performance: Manufactured to P4A tolerance class with bore and OD tolerances of -0.004mm to 0, ensuring exceptional running accuracy and minimal vibration. The 25° contact angle optimizes axial load carrying capacity while maintaining excellent high-speed characteristics.
High-Speed Capability: The phenolic resin cage and optimized internal geometry enable a limiting speed of 41,000 rpm, making it suitable for high-speed applications such as machine tool spindles.
Maintenance-Free Operation: Factory-sealed design with pre-applied grease provides long-term lubrication within the operating temperature range of -30°C to 110°C, ensuring reliable performance without additional maintenance.
S7008 ACD/P4ADGA Bearing Typical Application Areas
The S7008 ACD/P4ADGA is specifically engineered for precision applications requiring high rotational accuracy and stiffness:
- Machine Tool Spindles - High-speed machining centers and precision grinding machines
- Precision Instrumentation - Measuring equipment and optical devices
- High-Speed Motors - Spindle motors and servo drives
- Aerospace Components - Guidance systems and precision actuators
- Medical Equipment - Dental handpieces and surgical tools
