Filter for machine tool

A filter for use with a machine tool, operative to filter at least one of steel, brass, and copper from a liquid agent, the filter consisting of:

• a cylindrical container having a closed top end and a closed bottom end;
• an upper duct positioned near the top end of the container;
• a lower duct positioned near the bottom end of the container and having a lower diffuser fluidly connected thereto;
• a filtering element surrounding said lower diffuser, the filtering element having a diameter .phi., the filtering element having a first surface adjacent said top end and a second surface adjacent said bottom end, the filtering element consisting essentially of ilmenite particles having a density (d) of about 6 g/cm.sup.3 and a size (t) ranging between a smallest size of about 0.2 mm and a largest size of about 1.0 mm, said ilmenite particles being in the form of grains having sharp edges and irregular sized faces;
• the distance (h.sub.2) between the said upper and lower ducts being at least 1.2 times the height (h.sub.1) of the filtering element;
• and
• the upper duct having an upwardly directed diffuser of hemispherical shape facing said top end of the container, the upwardly directed diffuser having outlet holes therein and being situated at said distance (h.sub.2) from said lower duct and being at least one-sixth of the distance (h.sub.2) from said second surface of the said filtering element.