b'Eriez Hydroflow A bearing plant filters fluid with a central vacuum-filter system from Eriez Hydroflow.Advanced fluid filtration systems lead to superior finishes.By Alan Richter applications, 3m to 5m is often suitable.Compared to filtration systems purchased, A s demand grows for finer surface finishessay, a decade ago, many end users are willing and tolerance specifications becometo pay a 40 to 50 percent premium to achieve tighterand competition continues to inten- finer filtration and finishes, Cassese said. The sifyparts manufacturers are adopting ad- higher price can result from replacing a set-vanced fluid filtration technologies to achievetling tank, which just separates particulate their machining and grinding goals. from coolant, with a system that actively re-The fit and finish on some of the products,moves particulate. Today, those same peo-you cant even imagine, said Fred Poppe,ple are buying true filters because they need product manager for Ebbco Inc., New Balti- to get down to 10m.more, Mich. If you dont have the right filter,The up-front cost is higher, but savings are you cannot grind the proper surface finish. soon realized. He added that the company offers fluid fil- In his book Coolant Filtration, manufactur-tration equipment that removes particles froming consultant James J. Joseph emphasized 0.5m to 250m, as well as prefilters, such asthat cleaning coolants reduces costs. Many magnetic separators and drag-out devices. times an organization is pleasantly surprised The needed level of filtration depends onbecause the investment for coolant filtration the application, according to Tom Cassese,turned what started to be a financial liabil-director of sales for Eriez Hydroflow, Erie, Pa.itybecause of costs of cleaning coolants He said that removing particles from 15mfor disposalinto a financial asset, because to 20m is frequently the target when ma- of the savings realized by recirculating clean chining and 5m to 10m is common whencoolant, Joseph wrote.grinding. For honing and other fine-finishingJoseph stated that clean coolant reduces 48MARCH 2018Metalworking.indd 48 2/14/18 4:56 PM'