抄録
The present paper describes fatigue tests of plastic gears under high temperature. A test rig with high power has been developed to enable tests to be performed under large torque and high rotation speed. At the present, fatigue tests are performed only for natural PA46 gears ; i.e., non-reinforced gears. Therefore, applied torque is not so large, but rotation speed is high. As a result, when the applied torque is not so large, POM gears show higher strength than PA gears. When the applied torque becomes larger, PA46 gears show higher strength than POM and PA66 gears. This result would come from good tribological properties of PA46 material which can realize low friction between tooth flanks.
