Potential hazards of filter systems on machine tools: Why separators are the safer and more economical solution! In modern production environments, especially in mechanical engineering, air purification on machine tools plays a crucial role. However, there is often uncertainty when it comes to choosing the right technology: filter or separator – which system is the right one? In practice, it is becoming increasingly clear that filter systems not only involve hidden costs, but also considerable safety risks. <\/p>\n\n
Filter systems are often regarded as “the safe bet”. They filter efficiently, they store reliably – but this is precisely where the problem lies. Save filter!<\/strong> And what they store is rarely harmless in mechanical engineering!!!<\/strong><\/p>\n\n Two main types of cooling lubricants are used on machine tools: <\/p>\n\n – Non-water-soluble cutting fluids, i.e. pure, low-viscosity cutting oil <\/p>\n\n – Water-soluble emulsions, also known colloquially as drilling milk <\/p>\n\n Both variants pose a serious potential hazard when filtered – if they are collected in filters for weeks or months. <\/p>\n\n An impressive example: One of the world’s largest manufacturers of indexable inserts had over 100 machine tools in one hall – each with its own air cleaner. Each filter stored up to 100 liters of oil. This adds up to 10,000 liters of highly flammable oil<\/strong> that was stored uncontrolled in air cleaners. <\/p>\n\n The fire risk? Gigantic. <\/strong> While the machines were equipped with carbon dioxide extinguishing systems, the air purifiers had no fire protection at all. The issue was simply overlooked – with potentially catastrophic consequences. <\/p>\n\n Anyone who thinks they are on the safe side with water-soluble emulsions is mistaken. Although there is no acute fire load, there is another danger: uncontrolled bacterial growth<\/strong>. <\/p>\n\n Filters that absorb emulsions for weeks and store them at room temperature quickly turn into breeding grounds for bacteria and germs<\/strong>. This contaminated air is then released directly back into the workspace in recirculation mode – a massive health risk for staff<\/strong>. <\/p>\n\n