S71915 ACE/HCP4ATT
Hybrid Ceramic Super Precision Bearings
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S71915 ACE/HCP4ATT Bearing Product Overview & Core Advantages
The S71915 ACE/HCP4ATT is a super-precision angular contact ball bearing designed for the most demanding applications. As part of a triplex tandem (3-DT) matched set, it delivers exceptional high-speed performance and system rigidity. Its key advantages include the ability to handle significant combined radial and axial loads, facilitated by a 25° contact angle. The use of ceramic balls and a phenolic cage contributes to lower friction, reduced heat generation, and extended service life, making it ideal for high-precision, high-reliability spindles and machinery.
S71915 ACE/HCP4ATT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACE | Indicates a 25° contact angle and enhanced internal design for optimized performance. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls, which reduce centrifugal forces and allow for higher speeds. |
| P4A | Denotes an ultra-high tolerance class (ABEC 7 / P4) with additional running accuracy requirements for spindle applications. |
| T | Refers to the phenolic (textile) cage, which is lightweight and ideal for high-speed operation. |
S71915 ACE/HCP4ATT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The triplex tandem arrangement of three bearings creates an exceptionally rigid support system, capable of withstanding high combined loads and heavy thrust loads in one direction.
- Superior High-Speed Performance: The combination of ceramic balls (lower density than steel) and a lightweight phenolic cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 28,000 rpm.
- Precision & Accuracy: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining machining accuracy and surface finish.
- Pre-Lubricated & Sealed: The bearing comes sealed and pre-lubricated with grease, protecting against contamination and providing reliable operation within its specified temperature range.
S71915 ACE/HCP4ATT Bearing Typical Application Areas
This high-performance bearing set is engineered for advanced machinery requiring utmost precision and speed, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for aerospace and automotive component manufacturing.
- Other Precision Equipment: Applications where minimal thermal growth and high rotational accuracy are paramount.
