S71915 FE/HCP4ATT

• S71915: Basic designation for a 75mm bore, 105mm OD super-precision angular contact ball bearing.
• FE: Indicates a triplex tandem (3-DT) matched set, where three bearings are pre-loaded and matched to function as a single unit for maximum axial stiffness.
• HC: Signifies the use of Hybrid Ceramic balls (Silicon Nitride), which reduce friction, heat, and wear, enabling higher speeds.
• P4A: Denotes an ultra-precision tolerance class superior to ABEC 7, ensuring extremely tight dimensional and running accuracy.
• ATT: Specifies the phenolic (cellulose resin) cage material, which is lightweight and ideal for high-speed operation with minimal centrifugal forces.

Unmatched Rigidity and Load Capacity: The triplex tandem arrangement provides exceptional axial and radial stiffness, capable of handling significant combined loads. This configuration is engineered to withstand the rigorous demands of preloaded systems.

Superior High-Speed Performance: The combination of ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces and friction, allowing for a high limiting speed of 28,000 rpm. The 18° contact angle is optimized for high-speed applications requiring high axial rigidity.

Precision and Longevity: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The hybrid ceramic construction provides inherent electrical resistance and operates effectively within a wide temperature range from -30°C to 110°C.

This bearing is specifically engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:

• Machine Tool Spindles (High-speed milling, grinding, and turning centers)
• Precision Grinding Spindles
• High-Frequency Motors
• Aerospace Positioning Systems
• Medical and Dental Drill Handpieces