Each component is gas carborised in an pit type furnace, then hardened in oil electrical degreased and then tempered. The component is then shot blasted.
To ensure low distortion while hardening, Crown Wheels are press quenched i.e. the component, while hot, is held in a custom made die and immersed in quenching oil. Care is taken to ensure that the part is always pressed under controlled pressure while being quenched.
Some components are cooled to sub-zero temperatures, using special application low-temperature equipment, to get better micro structure. Some components are sharpened to get better life and stress control
