71907 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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71907 ACE/HCP4A Bearing Product Overview & Core Advantages
The 71907 ACE/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed operation. Its defining characteristic is a 25° contact angle, which enables it to support significant combined loads—both radial and axial—in one direction. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing offers exceptional running accuracy and is preloaded for enhanced system rigidity and reduced vibration. The combination of a ceramic ball material and a phenolic cage contributes to its superior performance in demanding environments.
71907 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | The basic bearing designation, indicating a high-precision, angular contact series with a 35mm bore, 55mm OD, and 10mm width. |
| ACE | Indicates a 25° contact angle and that the bearing is supplied with a preload for high rigidity. |
| HC | Signifies the use of Hybrid Ceramic balls, typically Silicon Nitride (Si3N4), for reduced weight, lower friction, and higher speed capability. |
| P4A | Denotes the P4 (ABEC-7) tolerance class for dimensional and running accuracy, with the 'A' suffix often indicating specific accuracy or grouping criteria. |
71907 ACE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and allows for a higher limiting speed (60,000 rpm). This construction also offers improved resistance to wear and electrical arcing.
- Optimized Cage Design: The lightweight phenolic cage is ideal for high-speed applications, providing excellent strength, low friction, and smooth guidance of the ceramic balls.
- High Rigidity & Preload: The bearing is supplied with a preload, which eliminates internal clearance. This results in greater stiffness, precise shaft positioning, and reduced noise and vibration under load.
- Superior Load Capacity: The 25° contact angle is optimized to handle substantial combined loads, making it suitable for applications where both radial and axial forces are present.
- Precision Ground to P4: The P4 tolerance class ensures minimal runout and vibration, which is critical for the accuracy and surface finish in precision machinery.
71907 ACE/HCP4A Bearing Typical Application Areas
The 71907 ACE/HCP4A is designed for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation instruments.
