71920 CE/P4A

The 71920 CE/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of rotational speed and running accuracy. As part of the 719 series, it features an extremely light preload and a compact cross-section, making it ideal for arrangements with limited radial space. The "CE" designation indicates a 25° contact angle, a design optimized to provide a balanced combination of radial and axial load capacity, with a strong emphasis on accommodating high speeds. The "P4A" classification signifies superior dimensional and running tolerances, equivalent to ABEC 7 standards, ensuring exceptional precision in operation. This bearing is typically constructed with advanced, high-purity steel rings and ceramic balls (hybrid) to further enhance performance.

The primary advantage of the 71920 CE/P4A lies in its outstanding performance under extreme operating conditions. The use of smaller, lighter ceramic balls reduces centrifugal forces and friction, which allows the bearing to run at significantly higher speeds with less heat generation. This leads directly to longer service life and extended lubricant intervals. The high degree of running accuracy provided by the P4A tolerance class increases system rigidity and minimizes vibration, which is critical for applications like high-speed machine tool spindles and precision rotating equipment. By enabling faster, more accurate, and more reliable machine operation, the 71920 CE/P4A bearing provides a direct path to improved productivity and manufacturing quality.

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