In what applications is cutting oil purification most critical?

Cutting oil purification is most critical in applications requiring high-precision machining and strict surface finish requirements, such as in the aerospace, automotive, and medical device industries. Operations involving hard-to-machine materials or high-speed machining generate more contaminants and heat, increasing the need for effective purification. High-volume manufacturing processes benefit from purification due to the significant cost savings from extended fluid life and reduced tool wear. Environments with stringent health, safety, and environmental regulations also prioritize cutting oil purification to ensure compliance and protect workers.