7008 CD/P4AQBCA
7000 Series Super Precision Angular Contact Ball Bearings
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7008 CD/P4AQBCA Bearing Product Overview & Core Advantages
The 7008 CD/P4AQBCA is a precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This metric system bearing features an extra light preload (Class A) and is supplied as a matched set of four bearings in a back-to-back (QBC) arrangement. This sophisticated configuration is engineered to handle combined radial and axial loads simultaneously, providing superior rotational accuracy and system stability. Its P4A tolerance class ensures ultra-precise running characteristics, making it ideal for high-precision, high-rigidity spindles and other critical machinery components.
7008 CD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing designation indicating a 40 mm bore, 68 mm OD, and 60 mm width. |
| CD | Contact angle of 15°. |
| P4A | High precision tolerance class for superior running accuracy. |
| QBC | Quadruplex Back-to-Back arrangement, indicating a matched set of 4 bearings. |
7008 CD/P4AQBCA Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The quadruplex back-to-back arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads and moments. This configuration significantly enhances system stability under complex loading conditions.
High-Precision Performance: Manufactured to P4A tolerance class with an extra light preload (Class A), this bearing delivers minimal runout and vibration, ensuring superior rotational accuracy essential for precision applications.
Optimized High-Speed Capability: The phenolic cage material provides excellent strength-to-weight ratio, contributing to the bearing's ability to operate at limiting speeds up to 43,000 rpm. The 15° contact angle is optimized for high-speed applications requiring both radial and axial load support.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, this bearing offers high hardness, wear resistance, and dimensional stability across its operating temperature range of -30°C to 110°C.
7008 CD/P4AQBCA Bearing Typical Application Areas
- High-Precision Machine Tool Spindles - for grinding, milling, and turning centers requiring extreme accuracy
- High-Speed Spindles - in PCB drilling, dental machining, and small-part processing equipment
- Precision Rotary Tables - for indexing and positioning applications demanding high rigidity
- Advanced Robotics - in high-accuracy rotary joints and precision actuators
- Aerospace Testing Equipment - where precision and reliability are critical
