Figure 1 shows the total force and the flank wear in a conventional milling process. In general one could state, that the more active types lead to a better force reduction, and that the more inactive types provided better antiwear. At low speed (low temperature) the adsorption properties can be reinforced by reactive antiwear additives such as for example dithiophosphates, phosphoric acid esters or phosphites. By using special production processes and selected raw materials it is possible to design special sulfurized products that combine antiwear properties and cutting functionality in one molecule.
Figure 2 shows the tool life over the cutting speed in a gear milling process. While the tool life decreases when using chlorinated paraffins the sulfur containing products gain outstanding tool life with increasing speed. Especially the truly synthesized synthetic sulfur carriers outperform chlorinated paraffins and also sulfurized hydrocarbons and esters blends. In more severe processes this behavior becomes even more apparent.
