Transfer Lubrication of a Gear Train

There have been a few practical uses of the indirect transfer process for gears in aerospace applications, but such systems do not appear to have been produced commercially, or used in terrestrial applications. 

Molybdenum disulphide is intrinsically an excellent lubricant. No details exist about the way in which it was used in the distant past, but almost certainly it was first used as a free solid. While not deliberately mixed with any other material, it would have been fairly impure. In recent years it has become usual for it to be used in conjunction with other substances to improve some specific property or to overcome some specific problem. From such points of view as ease of application, re-supply, quality control, corrosion prevention or service life, there can be significant advantages in using it in combination with other materials. Nevertheless, there are still many situations for which its use unmixed with other substances can provide a satisfactory, or even optimum, solution. 

There are basically seven different ways in which molybdenum disulphide can be used alone, namely as a free powder, dispersed in a liquid, as a compact, by in situ formation, as a burnished film, as a transfer film or in a sputtered film. Some 

Free powder Simplicity Messy, not very Open gears. 

Dispersion in Rapid evaporation Limited storage Anti-seize, 

---