S71920 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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S71920 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S71920 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This sealed bearing features a single, universal matchable design with an extra light preload (Class A), making it ideal for high-speed spindles and precision machinery. Its key advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high running accuracy, thanks to its P4A super precision tolerance and optimized internal geometry.
S71920 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Super Precision Bearing Series |
| 719 | High-Precision Angular Contact Bearing Design |
| 20 | Bore Diameter: 100 mm |
| AC | 25° Contact Angle |
| EGA | Universal Matchable Bearing (SU designation) |
| HC | Hybrid Ceramic (Ceramic Balls, Steel Rings) |
| P4A | Super Precision Tolerance Class (Equivalent to ABEC 7) |
S71920 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces friction, heat generation, and wear. This enables higher limiting speeds (16,250 rpm) and extended service life, especially in high-speed applications.
Phenolic Resin Cage: The lightweight and robust phenolic cage ensures excellent dimensional stability and guidance at high rotational speeds, contributing to smooth operation and reduced vibration.
Sealed & Pre-Lubricated Design: The integrated seals protect against contamination and retain the high-performance grease, making the bearing suitable for maintenance-free operation within its specified temperature range (-30°C to 110°C).
High Rigidity & Load Capacity: The 25° contact angle and precision manufacturing provide high rigidity, supporting substantial radial dynamic load ratings (8348 lbf) and axial loads.
S71920 ACEGA/HCP4A Bearing Typical Application Areas
This high-precision, hybrid ceramic bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Medical Equipment: Dental handpieces, surgical tools.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments.
- High-Speed Motors & Robotic Drives: Where low friction, high speed, and long life are critical.
