7004 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7004 ACE/HCP4A Bearing Product Overview & Core Advantages
The 7004 ACE/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional speed and rigidity. Designed to accommodate combined radial and axial loads in one direction, this bearing features a 25° contact angle for optimal thrust capacity. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, while the ceramic balls and phenolic cage enable outstanding high-speed performance up to 88,000 rpm. Preloaded and lubricated for immediate use, it delivers reliable operation in demanding environments.
7004 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series with 20mm bore, 42mm OD, 12mm width |
| ACE | Angular Contact design with 25° contact angle and optimized internal geometry |
| HCP4A | Hybrid Ceramic construction with P4 precision and preload designation |
7004 ACE/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: Silicon nitride ceramic balls provide superior high-speed capability, reduced friction, and extended service life compared to all-steel designs. The lower density of ceramic balls minimizes centrifugal forces at ultra-high speeds.
Precision Phenolic Cage: The phenolic resin cage offers excellent dimensional stability and strength at high rotational speeds, contributing to the bearing's 88,000 rpm limiting speed while reducing vibration and noise.
Optimized Internal Geometry: The 25° contact angle is engineered to handle significant axial loads while maintaining effective radial load capacity, making it ideal for applications requiring combined loading support.
P4 Super Precision: Manufactured to ABEC-7/P4 tolerance standards with tight dimensional controls (bore: -0.005mm to 0, OD: -0.006mm to 0) ensuring minimal runout and vibration for precision applications.
Preloaded Configuration: Factory preloading eliminates internal clearance, providing high rigidity and precise rotational accuracy from installation.
7004 ACE/HCP4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles - CNC machining centers, grinding spindles
- Precision Medical Equipment - Dental handpieces, surgical tools
- Aerospace Systems - Guidance systems, auxiliary power units
- Semiconductor Manufacturing - Wafer handling robots, precision stages
- High-Frequency Motors - Spindle motors, high-RPM drives
