71918 ACEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71918 ACEGA/P4A Bearing Product Overview & Core Advantages
The 71918 ACEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its 25° contact angle and extra light preload (Class A) make it ideally suited for handling combined radial and axial loads in high-precision spindles and other critical machinery. The bearing comes pre-lubricated and is part of a Universal Matchable (SU) set, ensuring optimal performance when used in pairs.
71918 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| AC | 25° Contact Angle | Optimized for combined radial and axial load capacity |
| EGA | Universal Matchable (SU) bearing set | Ensures precise performance when mounted in pairs without selective matching |
| P4A | Super Precision Tolerance Class | Provides exceptional running accuracy and dimensional stability |
71918 ACEGA/P4A Bearing Structural Features & Performance Benefits
High-Precision Design: The P4A tolerance class ensures minimal runout and vibration, critical for applications requiring extreme rotational accuracy. The phenolic cage provides excellent dimensional stability and reduced friction at high speeds.
Superior Load Capacity: With a 25° contact angle, this bearing efficiently handles combined radial and axial loads. The radial dynamic load rating of 6435 lbf and static load rating of 5130 lbf ensure reliable performance under demanding conditions.
High-Speed Capability: The phenolic cage material and optimized internal geometry enable operation at limiting speeds up to 15,000 rpm, making it suitable for high-speed spindle applications.
Precision Matching: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing without selective matching, simplifying installation and ensuring consistent preload and performance in duplex arrangements.
71918 ACEGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- High-Speed Machining Centers: Applications requiring extreme rotational accuracy and speed
- Precision Instrumentation: Measuring equipment and laboratory instruments
- Robotic Systems: High-precision robotic arms and automation equipment
- Aerospace Components: Guidance systems and auxiliary power units
