b'Clean Machine ing agent, the maxim like dissolvesmaking ultrasonics suitable to clean like applies. If a shop uses a non- parts with complex geometries and polar cutting fluid, such as mineralapertures.outside sales and business devel- oil or grease, a solvent might beWater-based detergents also ef-opment for Graymills Corp., Broad- the correct choice. When ultrasonicfectively break the soil bond when view, Illinois. cleaning, for example, chips andproperly matched to substrates and The right machine also needs toparticles, which are polar contami- soils based on the pH level, solution factor in load size and throughputnations, no longer adhere to a partconcentration and temperature.goals, said Cheryl Larkin, North- after the oil or grease is removedThe higher the temperature, the east regional sales manager for Mir- and are carried away by the clean- better, Siminovich said. Solvent-aclean Ultrasonics, Ashville, Newing action. basedmachinestypicallywork York. The ultrasonic process uses ultra- with a temperature of about 65.6 Finding the right parts cleaner ul- sound, usually 20 to 40 kHz, to agi- C (150 F) during the liquid phase. timately can be just as complicatedtate a fluid. Ultrasonics introducesWith vapor degreasing, the temper-as the cleaning process itself. microscopic bubbles into a clean- ature is about 121.1 C (250 F). For ing solution. They implode and takewater-based cleaning, the tempera-The Cleaning Process the soil with them. The bubblesture is usually about 37.8 to 48.9 C To select an appropriate clean- travel wherever a solution goes,(100 to 120 F).The DMD232 (left) is a small, manual drum-mount washer. The 500 (right) is a small, manual tank washer.Both have a pump for low-pressure spray washing.GraymillsGraymills42APRIL 2020PartsCleaning.indd 42 3/16/20 4:42 PM'