71905 ACEGB/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Product Overview and Core Advantages
The 71905 ACEGB/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications demanding exceptional speed and rigidity. This metric bearing features a light preload (Class B) and is universally matchable (SU), allowing for precise axial positioning and optimal performance in paired arrangements. Its construction with ceramic balls and phenolic cage enables superior high-speed operation, while the P4A tolerance class ensures outstanding running accuracy. It is designed to handle combined loads with a 25° contact angle, making it ideal for applications requiring high reliability and precision.
71905 ACEGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71905 | Basic bearing series and size designation (25mm bore, 42mm OD, 9mm width). |
| AC | Angular Contact design, optimized for combined radial and axial loads. |
| E | Reinforced internal design, providing increased load capacity. |
| GB | Light Preload (Class B) for reduced deflection and enhanced rigidity in operation. |
| HC | Hybrid Ceramic: Ceramic balls for reduced weight, lower friction, and higher speed capability. |
| P4A | High Precision Tolerance Class, ensuring extremely tight dimensional and running accuracy. |
Structural Features and Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces rotating mass and inertial forces, enabling a very high limiting speed of 100,500 rpm. This construction also provides superior resistance to wear and thermal expansion.
Optimized Internal Geometry (E-design): The reinforced internal structure increases the radial dynamic load rating (1141 lbf) and static load rating (596 lbf), providing robust performance under demanding combined loads.
Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high speeds, contributing to smooth operation and extended service life.
Precision and Preload: Manufactured to P4A tolerance and supplied with a light preload, this bearing delivers high running accuracy, minimal deflection, and immediate responsiveness, which is critical for high-precision spindles.
71905 ACEGB/HCP4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles for milling, grinding, and drilling
- Precision Robotics and automated guided vehicles (AGVs)
- High-Frequency Spindles in PCB drilling and routing equipment
- Medical and Dental Equipment such as high-speed handpieces
- Aerospace Actuation Systems and auxiliary power units
- Advanced Pump and Compressor Systems requiring high rotational accuracy
