Trane BRG01639 BRG01640 Motor Thrust Rear Bearing Assembly For Chillers HVAC Refrigeration

The TRANE BRG01639 and BRG01640 are the thrust bearing assemblies for the CenTraVac CVHE/CVHF/CVHG centrifugal machine motors. In Chinese, they are called the rear bearings of the motor. They are installed at the motor terminals (not the drive end) and can be replaced without disassembling the compressor. Both are double-row angular contact ball bearing assemblies, which perform axial positioning of the rotor and radial support. They rely on pressure oil supply to form an oil film, which suppresses vibration and reduces wear on the shaft neck. According to shaft neck classification: 01639 is a 7311 small diameter with a 2.16-inch bore, paired with NUT01071; 01640 is a 7318 large diameter with a 3.54-inch bore, paired with NUT01072. The original factory complete set comes with six-jaw self-locking nuts. Installation requires the use of hydraulic nuts and sleeves. They are suitable for non-capacity-increasing compressors. For variable-frequency units, ceramic versions 01641/01642 are used to prevent electro-corrosion and are regular OEM parts for major overhauls.