7004 CDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7004 CDGB/P4A Bearing Product Overview & Core Advantages
The 7004 CDGB/P4A is a single row angular contact ball bearing designed for exceptional precision and performance in demanding applications. As a P4A tolerance class bearing, it offers superior dimensional and running accuracy, making it ideal for high-speed spindles and precision machinery. Its key advantage lies in its ability to support combined loads, efficiently handling both radial and significant axial loads in one direction. The Universal Matchable (SU) design allows for flexible mounting in preloaded sets, enabling optimal system rigidity and rotational accuracy. With a light preload (Class B) and a phenolic cage, it is engineered for smooth, high-speed operation up to 63,000 rpm.
7004 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series designation, indicating a metric 20mm bore, 42mm OD, and 12mm width. |
| C | Specifies a 15° contact angle, optimized for high axial load capacity. |
| DGB | Indicates a Universal Matchable (SU) bearing, designed to be mounted in preloaded pairs or triplets (in this case, sets of 3) without the need for selective assembly. |
| /P4A | Denotes an extremely high tolerance class, signifying very tight dimensional and running accuracy for superior performance in precision applications. |
7004 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: The P4A tolerance and Universal Matchable (SU) design ensure minimal runout and high system rigidity when mounted in preloaded sets, providing exceptional rotational accuracy and stability.
- Optimized Load Capacity: The 15° contact angle and robust construction using chrome steel rings and balls provide a high dynamic load rating (1960 lbf), making it capable of handling demanding combined loads.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the open design and pre-lubrication facilitate efficient cooling and lubrication, enabling a high limiting speed of 63,000 rpm.
- Pre-Configured for Performance: The bearing comes with a light preload (Class B), which minimizes axial play and ensures precise positioning from the moment of installation, reducing setup complexity.
7004 CDGB/P4A Bearing Typical Application Areas
The 7004 CDGB/P4A is engineered for high-performance applications requiring precision, speed, and reliability. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instruments: Measuring devices, optical scanners, and laboratory equipment.
- High-Frequency Motors: Spindles for PCB drilling and small precision motors.
- Robotics: High-accuracy joints and actuators.
