RKB TDONASWE bearings are used on the tension reel of a 4Hi reversible cold rolling mill at a Mexican steel-processing company. The company processes flat steel, including cold-rolled and galvanized strip, and performs slitting, leveling, and other coil-processing operations.

In 2026, RKB successfully replaced the original bearing supplied by another premium bearing manufacturer. The cooperation began in 2014 with a specially designed bearing developed in agreement with the customer’s engineering team for a specific application..

The bearing supports the tension-reel mandrel during strip recoiling and uncoiling. It carries radial loads generated by the coil, mandrel, and strip tension while maintaining accurate shaft rotation. The replacement extends RKB’s supply scope to a critical component of the reversible cold rolling line.