7008 CBGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7008 CBGA/P4A Bearing Product Overview & Core Advantages
The 7008 CBGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers superior running precision and dimensional stability. Its extra light preload (Class A) minimizes deflection under light loads, making it ideal for high-speed spindles and other precision machinery where minimal friction and high rigidity are critical. The universal matching (SU) design allows for flexible mounting arrangements in pairs to support combined loads effectively.
7008 CBGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Standard bearing series number, indicating a 40mm bore, 68mm OD, and 15mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed applications and handling combined radial and axial loads. |
| B | Indicates a 40° pressure angle for enhanced axial load capacity. |
| GA | Denotes a universally matchable bearing designed for duplex pairs (DB, DF, DT) with pre-set axial clearance. |
| P4A | Signifies a high-precision tolerance class with enhanced dimensional and running accuracy beyond ABEC-7 standards. |
7008 CBGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage ensures low friction, reduced weight, and excellent acceleration characteristics, contributing to the high limiting speed of 41,000 rpm. The optimized internal geometry and 15° contact angle further support stable operation at extreme rotational velocities.
Exceptional Rigidity and Precision: Manufactured to P4A super-precision tolerances with bore and outside diameter tolerances of -0.004mm to 0, this bearing provides superior running accuracy and dimensional stability under high-speed and high-load conditions. The extra light preload minimizes system deflection for enhanced positional accuracy.
Superior Load Capacity: Constructed from chrome steel for both rings and balls, the bearing offers a high dynamic load rating of 1667 lbf and static load rating of 1260 lbf, capable of handling significant combined radial and axial loads.
Optimized for Matched Sets: The universal matchable (SU) designation allows two bearings to be paired in various configurations (back-to-back, face-to-face, or tandem) to optimize stiffness and load distribution for specific application requirements.
7008 CBGA/P4A Bearing Typical Application Areas
The 7008 CBGA/P4A is engineered for high-performance applications requiring extreme precision and speed, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- High-Speed Motors and Spindles: CNC machining centers and PCB drilling machines.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
- Aerospace Systems: Gyroscopes and navigation instruments.
