Abstract:The yield stress,elastic modulus,viscoelasticity,thixotropy and shear time degeneration of seven kinds of grease were tested by HAAKE RS6000 advanced rotary rheometer.The influence of rheological properties of lubricating grease on operating properties of small module gear was studied.The results show that the operating current and noise reduction properties of the grease are correlated with the rheological properties of the grease during the operation of the gears.Under the condition of similar consistency,the grease with the highest viscosity of base oil has the highest current and the lowest noise.The grease with low content of thickeners is beneficial to noise reduction of gears,but it is not that the lower the content of thickener,the better the noise reduction properties.When there are few thickeners in the grease,the adhesion of grease is decreased.During the operation of gears,lubricating grease is not easy to adhere to gears and has the effect of noise reduction and friction reduction.