7004 CD/P4ADT
7000 Series Super Precision Angular Contact Ball Bearings
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7004 CD/P4ADT Bearing Product Overview & Core Advantages
The 7004 CD/P4ADT is a precision angular contact ball bearing designed for high-rigidity applications requiring exceptional rotational accuracy. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to P4A tolerance class, making it ideal for machine tool spindles and other high-precision machinery. Its configuration enables it to handle significant combined loads (radial and axial) in one direction with superior stiffness and positional accuracy.
7004 CD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series with 20mm bore, 42mm OD, and 24mm width |
| C | 15° contact angle design |
| D | Duplex bearing arrangement |
| P4A | High precision tolerance class with enhanced running accuracy |
| DT | Tandem mounting arrangement for increased axial load capacity in one direction |
7004 CD/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The duplex tandem configuration with factory-applied preload delivers exceptional system stiffness and minimizes axial play, ensuring precise shaft positioning and reduced vibration during operation.
Enhanced Load Capacity: The 15° contact angle and tandem arrangement optimize the bearing for handling substantial axial loads in one direction while maintaining good radial load capability, achieving effective combined load management.
High-Speed Capability: The phenolic resin cage provides excellent dimensional stability and low friction at high rotational speeds, supporting operation up to 121,000 rpm.
Precision Manufacturing: Manufactured to P4A tolerance class with tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0) for superior running accuracy in demanding applications.
7004 CD/P4ADT Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- High-Speed Spindles: PCB drilling equipment, precision grinding applications
- Precision Instrumentation: Measuring devices, optical equipment, and laboratory instruments
- Robotics: High-accuracy robotic arm joints and precision positioning systems
