Special -80oC batch type freezing machine, for automobile gear shrinking purpose, which otherwise may be liquid nitrogen cooled for contraction of gears so that the gearbox assembly can be done. Against freezing and assembling, the heating – expanding and assembling is a very old method and results in change in the properties of the material.Specialized refrigeration cum heating unit for BARC equipped with glass doors for complete visibility of the samples incubating inside.