Because filters play such an important role in optimizing wire EDM, it is important to use a reliable product. Not only do filters need to be the correct physical size and media size, they must be properly constructed to handle the large amounts of sludge that is generated and to keep the EDM particles from being sent back into the cutting zone.

Premium OEM filters provide several unique designs that pack in more surface area to catch debris, such as expanding linear folds versus equal size radial folds, which increase the total surface area available in the filter. Media size and quality keep the dirt in the filter right from the start and does not require a precoat time before reaching the stated micron filtration level. Precoating allows dirt to pass through the larger media pores for several hours, directly affecting the machine and work quality during that time.

The flow rate of the filter is also critical to its overall performance. A filter that is smaller than recommended will have to pass the required water volume through too fast, which will not allow time to filter properly. This will cause it to plug up faster, resulting in more downtime and requiring more frequent changes.

Filter construction is also important to proper filtration. Filter systems will push the elements up to over 50 PSI before a change should be required. If the paper media, body construction or adhesive used to glue the media to the end caps is below standard, the filter will fail, allowing dirty water back into the machine’s fluid system and hurting both the machine and the end product. OEM filters are designed to run up to maximum system pressure without failure keeping the dirt where it belongs, not circulating through your machine.


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