71915 FE/HCP4ALDT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71915 FE/HCP4ALDT Bearing Product Overview & Core Advantages
The 71915 FE/HCP4ALDT is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to P4A tolerance class, ensuring superior running accuracy and system rigidity. Its core advantage lies in its ability to handle high combined loads (radial and axial) in one direction with maximum stiffness, making it ideal for high-speed spindles and precision machinery where minimal deflection is critical. The use of ceramic balls and a phenolic cage contributes to reduced friction, lower operating temperatures, and extended service life.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Basic bearing designation (75mm bore, 105mm OD, 32mm width) |
| FE | Filled with a specific, high-performance lubricant |
| HC | Hybrid Ceramic (Silicon Nitride balls) |
| P4A | High-Precision Tolerance Class (superior to ABEC 7) |
| DT | Duplex Tandem arrangement (two bearings mounted to increase axial load capacity in one direction) |
71915 FE/HCP4ALDT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem (DT) arrangement combines two bearings to create a highly rigid unit capable of supporting significant axial loads in one direction and combined loads. The 18° contact angle is optimized for high axial load carrying capacity.
- High-Speed Performance: The combination of lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 36,000 rpm. This makes it an excellent high-speed bearing.
- Precision & Accuracy: Manufactured to a P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures precise shaft positioning and smooth, vibration-free operation.
- Enhanced Durability: Hybrid ceramic construction with silicon nitride balls provides superior wear resistance, electrical insulation, and the ability to operate effectively within a wide temperature range (-30°C to 110°C).
- Pre-lubrication: The bearing is factory-filled (FE) with a high-quality grease, providing immediate operation and reducing initial maintenance requirements.
71915 FE/HCP4ALDT Bearing Typical Application Areas
This high-precision, high-speed bearing is engineered for advanced applications where accuracy and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors and Electric Spindles.
- Robotics: High-accuracy rotary joints and arms.
- Aerospace & Defense: Gyroscopes, navigation systems, and other critical instrumentation.
