The three successful products from the oil removal trials were evaluated on the supplied parts using ultrasonic energy. The products were diluted to 5% in 600 ml beakers using DI water and heated to 130 F in a Crest 40kHz ultrasonic tank filled with water. Products were degassed for 5 minutes.
Five different part types, each with a different oil were cleaned in each solution for five minutes using 40 kHz ultrasonic agitation. The parts were rinsed for 15 seconds in a tap water bath at 120 F and dried using compressed dry air at room temperature for 30 seconds. Once dry, parts were inspected visually for cleanliness.
The five oils were Tuff Draw 1730 R (knife), Vanishing oil 300 (spring), US 1517 (base plate), Blanking 250 (cup) and a combination of 6040 & 1730 R (converter).