Semi-synthetic machining coolants are a compromise blend of synthetic coolants (polymers) and water-soluble oils. Both of these types of coolants have advantages and disadvantages, and semi-synthetic coolants combine most of the advantages, and minimizes the disadvantages in machine coolants. Semi-synthetics are less likely to cause rust than synthetics, because of their oil content. They allow less bacteria growth than water-soluble oils, because the oil content is much lower. The semi-synthetic blends provide excellent cooling and lubrication properties while minimizing bacteria formation and rust prevention.
Manufacturers like Janed formulate different grades of semi-synthetics, so that there are coolants available for all types of machining operations. Each coolant product can have low to high cost ingredients. Typically, the higher the price of the product, the better performance it will give. Just because a metalworking fluid is lower in price does not mean that the customer will save money in the long run, because tool life and maintenance can be affected greatly by metalworking fluids.
Semi-synthetic Machining Coolants from:
