At a minimum, two characteristics are essential for the selection of characteristics:
- The viscosity is defined as a function of speeds and temperatures. We recommend to retain, at the operating temperature of 700 cSt for ball mill and from 1000 to 1500 cSt for kilns. The viscosity fell by half every 10 degrees above 40 degrees.
- The extreme pressure additives are essential to the working area (primitive), involved in reducing the coefficient of friction (reduces plastic deformation) and avoid micro seizures causing scratches, broken away and seizures. Graphite has the advantage.