In metal cutting, the maintenance and recycling of cooling lubricants is essential for securing a long working life for these highly specialized mixtures of water, oils and auxiliary substances. In addition, continuous separation of particles is an essential precondition for meeting surface qualities and dimensional tolerances during turning, milling, and grinding processes. For example, cooling lubricants are injected under high pressure in cutting machines. Here, particle filtration is essential for protecting the high pressure pump. Our filters also play an important role in the cleaning solution cycle in cabinets for cleaning parts after machining.