S71908 CEGA/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
S71908 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S71908 CEGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and high-speed capability. As a single bearing from a universally matchable (SU) set, it is designed to accommodate combined radial and axial loads simultaneously. Its construction with ceramic balls and a P4A super-precision tolerance class ensures low vibration, minimal heat generation, and extended service life, making it ideal for high-reliability and high-rigidity spindle arrangements.
S71908 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S71908 | Bearing series and size designation (40mm bore, 62mm OD, 12mm width) | Identifies the core dimensions and series for high-precision applications. |
| CE | Contact Angle (15°) and High-Precision Design | Optimized for high-speed operation and axial load capacity. |
| GA | Preload: Extra Light (Class A) | Provides minimal starting torque and optimal rigidity for precision spindles. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Reduces friction, allows for higher speeds, and increases bearing life. |
| P4A | Tolerance Class (Super Precision) | Ensures extremely tight dimensional and running accuracy for critical applications. |
S71908 CEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces and rolling friction, enabling a high limiting speed of 41,000 rpm. This construction also provides superior electrical resistance and operation in marginal lubrication conditions.
Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and guidance at high speeds, contributing to smooth operation and reduced cage wear.
Super-Precision P4A Tolerance: Manufactured to ABEC 7 / P4A standards, this bearing guarantees minimal runout and precise rotational accuracy, which is critical for applications like machine tool spindles.
15° Contact Angle & Preload: The 15-degree contact angle combined with an extra light (Class A) preload delivers high system rigidity and accurate rotational positioning while minimizing heat generation.
S71908 CEGA/HCP4A Bearing Typical Application Areas
The S71908 CEGA/HCP4A is ideally suited for high-performance machinery where speed, precision, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and spindle drives requiring high accuracy and rigidity.
- High-Frequency Motors & Spindles: PCB drilling spindles and dental handpieces.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation instruments.
- Medical Equipment: Centrifuges and high-speed laboratory apparatus.
