71918 FEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71918 FEGA/P4A Bearing Product Overview & Core Advantages
The 71918 FEGA/P4A is a single-row angular contact ball bearing designed for ultra-precise applications requiring exceptional rotational accuracy and high-speed capability. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its key advantage lies in its ability to support combined loads (radial and axial) efficiently, making it ideal for high-precision spindles and other demanding machinery. The bearing comes pre-lubricated and is universally matchable (SU), allowing for flexible mounting arrangements in duplex sets to achieve optimal preload and rigidity.
71918 FEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71918 | Basic bearing series and size designation (90mm bore, 125mm OD, 18mm width) |
| F | Machined brass cage design |
| E | Optimized internal design for higher speed and load capacity |
| GA | Universal matchable bearing for duplex mounting (can be paired in any combination) |
| P4A | High precision tolerance class exceeding ABEC 7 standards |
71918 FEGA/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on bore, outside diameter, and width, ensuring minimal runout and vibration for superior positioning accuracy.
Optimized Internal Geometry: The E-design features an increased ball count (24 balls) and larger ball diameter (11.112 mm), significantly boosting the radial dynamic load rating to 6795 lbf and radial static load rating to 5400 lbf.
High-Speed Capability: The combination of a lightweight, durable phenolic resin cage, a 15,000 rpm limiting speed, and a 18° contact angle makes this bearing exceptionally suited for high-speed spindle applications.
Universal Matching (SU): The GA suffix indicates the bearing is universally matchable. Two bearings can be paired in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements to support combined loads and moment loads with customized preload (Extra light / Class A in this case).
71918 FEGA/P4A Bearing Typical Application Areas
The 71918 FEGA/P4A is engineered for high-performance applications where precision and speed are critical. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and laboratory equipment.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Robotics: High-accuracy joints and rotary actuators.
