Gearbox Express takes a similar remanufacturing perspective with mainshafts as it does gearboxes.
Upon disassembly, the shaft undergoes both mag particle and ultrasonic inspection. The mainshaft bearing journal diameters are restored to the proper size to achieve the necessary interference fit with the bearing. In addition, the total indicated run out (TIR) to the gearbox connection at the shrink disc / carrier journal is brought back in to specification, correcting any “out of roundness” observed from original manufacture. New seals and an upgraded Timken bearing is installed followed by thorough filling of grease between all roller cavities and a flush fill with the bearing face.
Learn more about common minshaft failures here.