The WS series comprises solid lubricant additives for a wide range of applications, including coatings, polymers, and Constant Velocity Joint (CVJ) use. Its main strength lies in providing significant improvement in wear, especially under demanding conditions characterized by high temperatures and heavy loads.
The WS series is our additive line based on ultra-high purity synthetic Tungsten Disulfide (WS2). Its main function is to act as a solid lubricant under the most extreme conditions, offering the lowest possible coefficient of friction and superior thermal stability compared to any other metal sulfide, including Molybdenum Disulfide (MoS2).
The WS series is the ultimate solution for the most severe operating conditions. It should be chosen over other options in the following cases:
While both are excellent high-temperature lubricants, the WS series (Tungsten Disulfide) offers key advantages. WS2 has an intrinsically lower coefficient of friction than graphite (typically 0.03 vs 0.08 under optimal conditions). Furthermore, graphite can be abrasive under certain conditions and requires the presence of water vapor for effective lubricity, limiting its use in dry or vacuum environments where WS2 excels.
Due to its high efficiency as a friction reducer, significant benefits can be observed at lower treat rates than other solids. We recommend starting evaluations in the range of 1% to 3% by weight. For applications combining extreme temperature and high load, the dosage can be increased up to 5%.
Yes. Like other solid lubricants in our range, Tungsten Disulfide is a chemically inert material. This ensures full compatibility with the vast majority of grease formulations, regardless of the thickener type (lithium complex, calcium sulfonate, polyurea, etc.) or the nature of the base oil (mineral or synthetic). Its incorporation process is identical to that of other powder additives.