Brand: FAFNIR
FAF NIR MM 50 EX CR 50 Super Precision Spindle Bearing | 50x80x16mm | 25° Contact Angle | P4 Class
The MM 50 EX CR 50 is a single-row, super precision angular contact ball bearing engineered for demanding machine tool applications where extreme rotational accuracy, high speed, and minimal thermal displacement are critical. Featuring a 25-degree contact angle (EX designation), this bearing is optimized for balanced axial and radial rigidity, providing excellent load-carrying capacity at elevated RPMs. Manufactured to P4 (ABEC 7) precision standards, it incorporates highly rigid, low-friction ball guiding elements and a specialized fiber-reinforced phenolic resin cage (CR 50 suffix) to minimize inertia and withstand rapid acceleration and deceleration cycles. The optimized internal geometry ensures minimal temperature generation, crucial for maintaining spindle stability during continuous operation.
Designed primarily for mounting in duplex or tandem arrangements, the FAFNIR MM 50 EX CR 50 provides the exceptional stiffness required for grinding spindles, high-speed routing, and CNC machining centers. Its specialized design facilitates precision preload settings, ensuring immediate and consistent performance right out of the box, reducing vibration and improving surface finish quality on manufactured parts. By investing in this super precision bearing, operators can significantly extend the maintenance intervals of their core machinery, minimize downtime, and ensure reliable, repeatable performance in the most demanding high-throughput production environments.
