The three-phase traction motor is directly screwed on to the gearbox casing without any end shield. On the non-drive side, a deep groove ball bearing, equipped with a brass cage, supports radial and axial loads and locates the traction motor shaft in the axial direction. This is the only grease lubricated bearing in the drive system. The maximum traction motor speed is 4,200 r/min. On the traction motor shaft, a pinion is directly fitted with a strong press fit, while the cylindrical roller bearing is mounted directly inside the gearbox. This NU type bearing is oil lubricated and supports only radial loads. The shaft deflection could be minimised by a special design and is less than 3 minutes of arc at this bearing location in operation.