729 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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729 ACD/HCP4A Bearing Product Overview & Core Advantages
The 729 ACD/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and speed capabilities. This precision bearing features a P4 (ABEC-7) tolerance class, ensuring minimal runout and superior dimensional stability. Its ceramic ball construction and phenolic cage enable outstanding high-speed performance with a limiting speed of 110,000 rpm, while the 25° contact angle provides optimal combined load capacity for handling both radial and axial loads simultaneously.
729 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACD | Angular Contact Design | Optimized for combined radial and axial loads |
| HC | Hybrid Ceramic | Reduced friction, higher speed capability, and longer service life |
| P4A | P4 Precision Class with Special Accuracy | Ultra-precise running accuracy for demanding applications |
729 ACD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear, enabling superior high-speed operation and extended service life in demanding environments.
Phenolic Resin Cage: The lightweight phenolic cage provides excellent dimensional stability at high temperatures and speeds, contributing to the bearing's exceptional rotational precision and vibration damping characteristics.
Precision Engineering: With P4 tolerance class and tight bearing dimensions (9mm bore, 26mm OD, 8mm width), this bearing delivers minimal runout and consistent performance in precision assemblies.
Optimized Load Capacity: The 25° contact angle design ensures efficient handling of combined loads, with a dynamic load rating of 893 lbf and static load rating of 360 lbf for reliable operation under various loading conditions.
729 ACD/HCP4A Bearing Typical Application Areas
- High-speed machine tool spindles and precision machining centers
- Medical equipment including dental handpieces and surgical tools
- Aerospace components requiring high precision and reliability
- Laboratory and analytical instruments demanding exceptional rotational accuracy
- Semiconductor manufacturing equipment and cleanroom applications
- High-performance robotics and automation systems
