The Application of the Method of Locati Accelerated Test to the Contaction Fatigue Tests of Gear Li GuohuaIt takes much time and money to carry out the contaction fatigue tests of gears with a routine method. This paper recommends the method of locati accelerated tests which could evaluate the fatigue limit stress of a material only by a test of one pair test piece, and could save us much time and money.It't fundamentals, application to the contact fatigue tests of gears and examples we have done on the CL-100 gear tester are introduced in this paper.Pitting;;Contact limit of faligue stress;;Carrying capacity