Blaser Swisslube AG recently suggested the use of coolant during longer production stop, like the stop triggered by the virus, one can clean the machines and fill them with a new coolant. This will help to monitor and maintain the metalworking fluid, which is required anyway. As the chemistry and microbiology continue to be active in the water-miscible metalworking fluid even when the machines are not running, which means the fluid doesn’t circulate anymore and there’s no supply with fresh emulsion in the machine, can lead to severe problems, such as bad smell, corrosion of machine parts and splitting of the emulsion. One should, therefore, decide whether to maintain the coolant during the production stop or whether it’s a good opportunity to dispose the old coolant, clean the machines and get them ready for future production. The water-miscible metalworking fluids cannot be left on their own, while the cutting and grinding oils do not need any specific precautions.
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