By stating the necessary functions of gear lubricants there will be a basis for consideration of how these purposes are accomplished and what characteristics are desirable in satisfactory gear oil. While the relative importance of the qualities of such lubricants may vary with the specific use, the listing below includes the most desirable functions of gear oils. Minor qualities will have consideration later.
(a) Reduction of wear in gears and on adjacent moving parts.
(d) Prevention of corrosion ( this statement may have to be modified in the case of EP gear lubricants)
(e) Reduction of noise, vibration, and shock between gear teeth.
(f) Flush away contaminants.
(g) Act as a carrier for additives.
(h) Act as a structural material in that the lubricant is a factor in determining the strength of the gears against breakage, pitting, and welding.
