S7008 CB/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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S7008 CB/HCP4ADBA Bearing Product Overview & Core Advantages
The S7008 CB/HCP4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. This matched set in a Back-to-Back (DB) arrangement is preloaded to Extra Light (Class A) standards, providing superior running accuracy and stability. Its construction, featuring a phenolic cage and ceramic balls, is optimized for high-speed operation up to 41,000 rpm, while the sealed design with grease lubrication ensures long-term, maintenance-free performance. This bearing is engineered to handle combined loads efficiently, making it an ideal solution for high-precision, high-rigidity spindle systems.
Model Code Breakdown
- S7008: Basic model number for a 40mm bore, 68mm OD angular contact ball bearing.
- C: Indicates a 15° contact angle.
- B: Designates the Back-to-Back (DB) duplex arrangement.
- HC: Signifies the use of Hybrid Ceramic balls (Silicon Nitride).
- P4A: Denotes a high-precision tolerance class (equivalent to ABEC 7).
- DB: Confirms the Duplex Back-to-Back preloaded pair.
- A: Specifies the Extra Light preload level.
S7008 CB/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The duplex DB arrangement and Class A preload eliminate internal clearance, resulting in extremely high system rigidity and precise shaft positioning, critical for machining accuracy.
Enhanced Speed and Temperature Performance: The combination of a lightweight phenolic cage and ceramic balls reduces centrifugal forces and friction, enabling higher limiting speeds and stable operation within a temperature range of -30°C to 110°C.
Superior Load Capacity: With a dynamic load rating of 2678 lbf and a static load rating of 2520 lbf, this bearing is capable of handling significant combined radial and axial loads.
Maintenance-Free Operation: The sealed design and factory-applied grease protect against contamination and provide long-lasting lubrication, ensuring reliability and reducing maintenance needs.
S7008 CB/HCP4ADBA Bearing Typical Application Areas
This high-precision bearing is ideally suited for applications requiring high speed, rigidity, and accuracy, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Spindles
- Precision Rotary Tables
- High-Speed Automation and Robotics
- Medical and Dental Equipment Spindles
