7007 CBGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7007 CBGA/P4A Bearing Product Overview & Core Advantages
The 7007 CBGA/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, making it ideal for high-speed spindles. Its extra light preload (Class A) minimizes friction and heat generation at high speeds, while the universal matching (SU) design allows for flexible mounting in duplex sets (DB, DF, DT) to handle combined loads effectively. The open design, coupled with a phenolic cage, facilitates optimal lubrication management for superior performance.
7007 CBGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7007 | Basic bearing series, indicating a 35mm bore, 62mm OD, and 14mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed applications requiring high rigidity. |
| B | Indicates a 40° pressure angle (implied by standard angular contact design with 15° nominal contact angle). |
| GA | Signifies a specific internal clearance and preload group for universal matching (SU). |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7 standards, for applications requiring extreme running accuracy. |
7007 CBGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of a lightweight phenolic resin cage, a 15° contact angle, and extra light preload enables a high limiting speed of 56,000 rpm, reducing centrifugal forces and operational temperature.
Exceptional Rigidity and Load Capacity: The single-row angular contact design, when mounted in preloaded pairs, provides high axial and radial stiffness, capable of handling significant combined (radial and axial) loads with a dynamic load rating of 1550 lbf and a static load rating of 1080 lbf.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on bore, outside diameter, and width, ensuring predictable performance and precise shaft positioning.
Optimized for Matched Sets: The Universal Matchable (SU) feature allows bearings to be supplied in pre-engineered pairs (set of 2) for immediate installation in DB, DF, or DT arrangements, simplifying assembly and guaranteeing optimal preload.
7007 CBGA/P4A Bearing Typical Application Areas
The 7007 CBGA/P4A is engineered for high-performance machinery where precision and speed are critical. Its primary applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: CNC rotary tables, indexing heads, and robotic arm joints.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Aerospace and Defense Systems: Gyroscopes, radar platforms, and navigation instruments.
