Based on the test results of warm gear drive lubricated by 15 types of oil

the effect of oils with different additives and varied contents is studied on anti-scuffing capacity of warm gear pair.The following conclusions are obtained:（1） the anti-scuffing capacity of worm gear pair could be lowered considerably if unsuitable oil additives are used.（2） the anti-scuffing capacity of worm gear pair is enhanced by the increase of anti-wear additive in the oil.（3） the anti-scuffing capacity of warm gear pair could also be enhanced if the content of extreme pressure（EP） additives is increased

but the effect was not so good as anti-wear additives.