Depending on the capacity you are looking for, there are many coolant filters on the market. It is important to understand that the three main designs for coolant filtration are magnetic, centrifuge, and media. Media filters are usually split into two types; disposable and permanent. Most manufacturers of coolant filters have all types, depending on your specific application. But each situation is different and that will determine which you need.

When recovering metal cutting fluids and recycling oils from a machining environment, filters are essential to both save you money and save the environment. The benefits of filtering your used coolant can be summarized as follows:

• saves money
• increases tool life
• increases productivity due to less maintenance

If you are in the machining business and cutting ferrous materials a magnetic coolant filtration system will be your best pick.  Some magnetic filters can remove as much as 99% of the debris from the coolant.

It is best to use stages and actually remove the magnetic particles first, then filter the remainder through a fiber media.  Some systems can also detect pressure drops in coolant delivery and alert you to the need to change the filter.  Others can index a new filter into the stream automatically as needed. In this way a fresh layer of filter is exposed and clean coolant runs continuously to the machine.

Another type of filtration for your coolant is the centrifuge.  A centrifuge filter system has many advantages over the other types.  By using the forces of gravity, this filter system can separate large quantities of metal debris from your liquid coolants.  Again this system will almost always be paired will a final stage using a media filter to remove the fine particles that can cause wear on tools.   Centrifuge systems that may be worth looking at can be found at US Centrifuge.  This company is a leader in this type of filter.  Another good company is PRAB/Monlan.