AZ190003310239 modified rear intermediate shaft bearing is an important supporting rolling bearing for Sinotruk heavy truck gearbox countershaft assembly. It is installed at the rear end of the gearbox intermediate shaft, undertaking radial and partial axial loads generated during gear meshing and power transmission. Manufactured from premium bearing steel with precision grinding and heat treatment, the bearing features high hardness, stable metallographic structure and outstanding contact fatigue resistance. It maintains smooth rotation of the intermediate shaft, ensures accurate meshing of intermediate shaft gears, reduces friction loss and prevents abnormal vibration and noise during gearbox operation. Each bearing undergoes strict dimensional inspection, rotational flexibility test, noise detection and load fatigue test before shipment. It can withstand long-term heavy load, shock and vibration under complex road conditions, effectively avoiding bearing heating, pitting, peeling and locking failures. It is an essential replacement part for gearbox overhaul. We maintain sufficient inventory and stable bulk supply for repair workshops, fleet operators, auto spare parts dealers and global cross-border export customers.