71908 ACE/HCP4ADT
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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71908 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The 71908 ACE/HCP4ADT is a 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 rotational precision. Its key advantage lies in its ability to handle high axial loads in one direction with maximum rigidity, making it ideal for high-speed spindles and precision machinery where uncompromising performance is critical.
71908 ACE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Basic bearing designation (40mm bore, 62mm OD, 24mm width) |
| ACE | 25° contact angle, optimized internal design |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| DT | Duplex Tandem arrangement for maximum axial load capacity in one direction |
71908 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, increases limiting speed (41,000 rpm), and provides superior resistance to wear and heat generation.
Duplex Tandem Preload: The matched set of two bearings is preloaded in a tandem arrangement, delivering exceptional stiffness and maximizing axial load capacity in one direction, which is crucial for high-precision applications.
Phenolic Cage & Precision Engineering: The phenolic resin cage offers excellent strength-to-weight ratio and is ideal for high-speed operation. Manufactured to P4A tolerance class with tight dimensional control, this bearing ensures smooth, quiet, and precise rotation.
71908 ACE/HCP4ADT Bearing Typical Application Areas
This high-precision duplex tandem bearing is specifically engineered for applications requiring extreme accuracy, high speeds, and rigid axial support:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics (High-accuracy robotic arms and joints)
- Aerospace Systems (Gyroscopes, navigation systems)
- Medical Equipment (Dental handpieces, surgical tools)
- High-Frequency Spindles (PCB drilling, precision engraving)
