7004 CE/HCP4ALDT
Hybrid Ceramic Super Precision Bearings
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7004 CE/HCP4ALDT Bearing Product Overview & Core Advantages
The 7004 CE/HCP4ALDT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement consists of two matched bearings, preloaded to deliver superior high rigidity and axial load capacity in one direction. Manufactured to the stringent P4A tolerance class, it features a ceramic ball and phenolic cage construction, enabling reliable operation at high speeds up to 100,000 rpm. Its compact design and pre-lubrication make it an ideal, ready-to-install solution for high-precision spindles and machinery.
7004 CE/HCP4ALDT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series, indicating a 20mm bore, 42mm OD, and 24mm width. |
| C | 15° contact angle, optimized for combined loads. |
| E | Optimized internal design for enhanced performance and high-speed capability. |
| HC | Hybrid Ceramic construction, featuring ceramic balls for reduced friction, heat generation, and longer service life. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards for exceptional running accuracy. |
| DT | Duplex Tandem arrangement. Two bearings are mounted together and preloaded to maximize axial stiffness and load capacity in a single direction. |
7004 CE/HCP4ALDT Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and minimizes wear, which is critical for achieving the high limiting speed of 100,000 rpm.
Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance at high speeds, contributing to smooth and quiet operation.
Duplex Tandem Preload: The DT matched arrangement is factory-preloaded, eliminating internal clearance. This delivers immediate high rigidity, precise shaft positioning, and superior resistance to combined loads (radial and axial).
Precision Engineering: The P4A tolerance class ensures minimal runout and vibration, which is essential for applications demanding the highest levels of accuracy and surface finish.
7004 CE/HCP4ALDT Bearing Typical Application Areas
This high-performance bearing is engineered for the most demanding precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation instruments.
