7004 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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7004 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7004 CD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered as a Universal Matchable (SU) pair, this bearing set is pre-configured to deliver optimal performance when mounted in tandem. Its ceramic ball construction and P4A tolerance class ensure superior high-speed capability and minimal rotational runout, making it ideal for machine tool spindles and other high-reliability equipment. The combination of an extra light preload and a 15° contact angle provides excellent rigidity and responsiveness under complex loading conditions.
7004 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series designation, indicating a 20mm bore, 42mm OD, and 24mm width. |
| C | Designates a 15° contact angle. |
| D | Indicates the bearing is part of a Universal Matchable (SU) pair. |
| HC | Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings). |
| P4A | Specifies the high-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| ADGA | Indicates an Extra Light (A) preload and factory-applied grease lubrication. |
7004 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially at high speeds (up to 103,000 rpm dmn). This construction also provides inherent electrical insulation and superior corrosion resistance.
High Rigidity & Load Capacity: The angular contact design and Universal Matchable (SU) pairing allow the bearing set to withstand significant combined loads (radial and axial) simultaneously. The extra light preload ensures high system rigidity with minimal friction.
Precision & Speed: Manufactured to P4A tolerance class and featuring a lightweight phenolic cage, this bearing achieves exceptional rotational accuracy and stability, enabling smooth operation at extreme rotational speeds.
Optimized for Matched Sets: Supplied as a pre-matched pair, these bearings are engineered to share loads evenly, simplifying installation and guaranteeing predictable, high-performance operation in duplex arrangements.
7004 CD/HCP4ADGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instrumentation: Measuring devices, optical scanners.
- High-Frequency Motors & Spindles: PCB drilling spindles, dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, navigation systems.
