S71915 ACE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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S71915 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The S71915 ACE/HCP4ADT is a super-precision angular contact ball bearing designed for the most demanding high-performance applications. This duplex tandem (DT) matched set delivers exceptional high-speed capability and high rigidity, making it ideal for machine tool spindles and other precision machinery. Its ceramic ball construction and P4A tolerance class ensure superior rotational accuracy and extended service life under combined radial and axial loads.
S71915 ACE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
- S71915: Basic series designation for a 75mm bore, 105mm OD super-precision bearing.
- ACE: Internal design code signifying a 25° contact angle and optimized internal geometry.
- HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride).
- P4A: Indicates a tolerance class stricter than ABEC 7/ISO P4, ensuring ultra-precise running accuracy.
- DT: Specifies the Duplex Tandem preload arrangement, where two bearings are mounted to handle heavy axial loads in one direction.
S71915 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds. This also provides superior resistance to wear and a longer operational lifespan.
Phenolic Resin Cage: The lightweight and robust phenolic cage contributes to smooth operation at high speeds and offers excellent dimensional stability.
Duplex Tandem (DT) Matched Set: This preloaded arrangement of two bearings provides maximum axial stiffness and is designed to support very high axial loads in a single direction, a critical requirement for spindle applications.
Super-Precision P4A Tolerance: Manufactured to the ultra-precise P4A tolerance class, this bearing guarantees minimal runout and vibration, which is essential for achieving high levels of machining accuracy and surface finish quality.
S71915 ACE/HCP4ADT Bearing Typical Application Areas
The S71915 ACE/HCP4ADT is engineered 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 Robotic Drives
- High-Frequency Motors
- Aerospace & Defense Systems
- Medical & Dental Equipment Spindles
