Are there rules for racking parts- material, coating, or part orientation?
Yes. Never put the parts on the bottom of an ultrasonic tank. You will prevent the correct movement of the diaphragm and interfere with the creation of ultrasonic energy. You can also subject the parts to damage. Parts should be racked in a basket or work holder designed to handle your specific part. This is very important in high end cleaning systems where you want the cleanest part possible. You should always use a stainless steel basket, as softer materials will absorb the ultrasonic energy. Never use plastic or other soft materials. If your part is easily damaged or scratched, stainless steel racks with Nylobond or Teflon coatings are available. Parts should be arranged in a single layer, this gives the cleaning fluid an opportunity to circulate and remove particulate from the immediate area of the part. When removing the parts from the cleaning solution a single layer prevents the upper parts from shedding particles on the lower parts. Never put the parts on the bottom of an ultra
