lubricating oil China

...Silicon nitride guide rollers are more resistant to high temperature, high hardness, high toughness, impact resistance and oxidation resistance. At the same time, silicon nitride guide rolls are oil-free, self-lubricating, low in density and light in weight. The service life is more than ten times that of the alloy guide roller. Silicon Nitride (Si3N4) Characteristics: 1 Good thermal shock resistance 2 Creep resistance 3 Low density 4 High fracture toughness 5 High hardness and wear resistance 6 Electrical resistivity...