This modernized basketless rotary-hearth furnace is based on similar design characteristics as its predecessor but integrates multiple carousel levels as a means of increasing the system capacity.

The thermal processing of high-volume cast-aluminum engine blocks and cylinder head components is a key concern of automotive engineers today. As a result, auto manufacturers have worked closely with designers of customized thermal-processing systems in the development of a new cylinder head and engine block heat-treatment system.

The current state of the art for industrial heat-treatment furnaces and related ancillary equipment (quench equipment, atmosphere generators, etc.) traces much of its origins to World War I, where the demands for high-volume equipment necessitated larger batch and continuous furnace systems.