NNU4996-S-K-M-SP

The NNU4996-S-K-M-SP Super Precision Bearing represents the pinnacle of bearing engineering, meticulously designed for applications demanding the utmost in radial rigidity, load carrying capacity, and running accuracy. As a double-row cylindrical roller bearing (NNU series), it features integral flanges on both its inner and outer rings, ensuring precise axial location of the shaft and exceptional stiffness. The "4996" designation indicates a very large-sized bearing, making it suitable for heavy-duty, high-precision machinery. The "S" suffix signifies a special internal design, often optimized for superior high-speed performance and enhanced contact stiffness, contributing to its remarkable precision. Its "K" designation highlights a tapered bore with a 1:12 taper, facilitating easy and highly accurate mounting and dismounting, which is crucial for achieving precise radial clearance settings, especially for bearings of this considerable size. Furthermore, the "M" denotes a robust, solid brass cage, roller-guided, ensuring reliable operation, reduced friction, and excellent durability even at elevated temperatures and high speeds. The "SP" classification confirms its Super Precision tolerance class, the highest available, guaranteeing extremely tight dimensional tolerances and minimal runout. Consequently, the NNU4996-S-K-M-SP bearing is the preferred choice for critical components such as the main spindles of advanced machine tools (e.g., grinding, boring, and milling machines), high-precision gearboxes, and rotary tables where unwavering accuracy and long-term reliability are non-negotiable.

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