7004 CD/P4ATBTA
7000 Series Super Precision Angular Contact Ball Bearings
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7004 CD/P4ATBTA Bearing Product Overview & Core Advantages
The 7004 CD/P4ATBTA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This triplex back-to-back (TBT) matched set delivers superior performance in handling combined radial and axial loads. Manufactured to P4A tolerance class, it ensures minimal runout and stable operation, making it ideal for high-speed, high-precision machinery where maximum system rigidity and positioning accuracy are critical.
7004 CD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series and size designation (20mm bore, 42mm OD). |
| CD | Specifies a 15° contact angle and optimized internal geometry for high-speed operation. |
| P4A | Indicates high precision tolerance class (superior to ABEC 7), ensuring minimal dimensional and running accuracy deviations. |
| TBT | Denotes the bearing is part of a Triplex Back-to-Back matched set of three bearings, pre-configured for maximum system rigidity. |
| A | Signifies the Extra Light preload level, which minimizes friction and heat generation for optimal high-speed performance. |
7004 CD/P4ATBTA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back arrangement creates an extremely rigid bearing system, capable of withstanding heavy combined loads and moments. This configuration significantly enhances the stability of the spindle or shaft.
High-Speed Capability: The 15° contact angle and light phenolic cage are engineered for reduced centrifugal forces and lower friction, enabling a high limiting speed of 63,000 rpm. The open design and factory lubrication facilitate efficient heat dissipation.
Precision Performance: Adherence to the P4A tolerance class guarantees superior running accuracy, low noise, and low vibration levels, which are essential for applications requiring high positional repeatability.
Durability & Reliability: Constructed from chrome steel for both rings and balls, this bearing offers high fatigue life and wear resistance, ensuring long-term operational reliability.
7004 CD/P4ATBTA Bearing Typical Application Areas
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Machining Centers
- PCB Drilling and Milling Spindles
- Advanced Robotic Drives and Servo Motors
