Why Non-Drive End Bearings of Traction Motors Fail "Silently"In the drive system of rail transit trains, traction motor bearings are divided into two key parts: the Drive End (DE) bearing and the Non-Drive End (NDE) bearing. Intuitively, the NDE bearing is far from the gear meshing area and bears lo

In an ideal scenario, a pair of absolutely rigid and perfectly aligned gears meshing under no load will form a clear, straight line of contact running across the tooth surface, which we refer to as the theoretical contact line. However, in the practical engineering world, gears are elastic, subject

Core Industry Knowledge of Railway Bearing Sealing Systems: Sealing as the First Line of Defense for Bearing LifeIn the operation and maintenance system of railway equipment, bearings are the key support for core components such as bogies and traction motors. Bearing failure is often attributed to m

The Core Concept: Boundary Effects Determine Precision LimitsIn gear hobbing, while stable cutting parameters are crucial, the ultimate precision of a gear is often limited by the dynamic events at the very beginning and end of the process. Errors introduced during these phases are not corrected lat