7007 CD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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7007 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7007 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded to Light / Class B specifications, providing superior system stiffness and minimizing axial and radial runout. Its primary advantage lies in its ability to handle combined loads—significant radial loads alongside bidirectional axial loads—making it ideal for high-precision, high-rigidity applications such as machine tool spindles and precision rotary tables.
7007 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
- 7007: Basic bearing series, indicating a 35mm bore, 62mm OD, and 28mm width.
- C: Denotes a 15° contact angle, optimized for high-speed operation with moderate axial load capacity.
- D: Indicates the bearing is part of a duplex (paired) set.
- P4A: Specifies a super-precision tolerance class (equivalent to ABEC 7), ensuring extremely tight dimensional and running accuracy.
- DB: Stands for Duplex Back-to-Back arrangement. This configuration increases moment rigidity and is optimal for supporting overturning moments.
- B: Indicates the specific Light preload applied to the matched set.
7007 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity and System Stability: The back-to-back (DB) duplex design creates a wide effective spread, significantly increasing the bearing system's moment stiffness and resistance to operational deflection. The applied light preload eliminates internal clearance, ensuring constant ball-raceway contact for precise, chatter-free operation.
Superior Precision: Manufactured to P4A super-precision tolerance, this bearing guarantees minimal runout and vibration, which is critical for achieving high surface finishes and positioning accuracy.
Optimized for High-Speed Performance: The 15° contact angle and lightweight phenolic resin cage reduce centrifugal forces and friction, enabling high limiting speeds of up to 56,000 rpm. The phenolic cage also offers excellent performance under poor lubrication conditions.
High Load Capacity: With a dynamic load rating of 5738 lbf and a static load rating of 4275 lbf, it reliably sustains the combined loads encountered in demanding applications.
7007 CD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is engineered for the most demanding applications where accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables and Indexing Heads.
- High-Frequency Spindles for PCB drilling and routing.
- Robotic Arm Rotary Joints requiring high positional accuracy.
- Medical Equipment such as dental handpieces and imaging scanners.
