Studies on Limiting Load for Scoring of Spur Gears : Effects of Zn-P Anti-Wear Agent by Means of FZG Gear Test Rig

Abstract

The limiting load for scoring was investigated by means of the FZG gear testing machine. The influences of coefficient of oil viscosity and concentration of anti-wear agent (Zn-P type) in oil upon the limiting load for scoring were disclosed. Furthermore the results of these gear tests were compared with the results of 4 ball tests. We have found in general that the higher the revolutional speed of gear, the greater the the influence of anti-wear agent upon the increasing rate of limiting load for scoring. And further we have found that the lower the viscosity of base oil, the greater the influence of anti-wear agent (Zn-P type) up-on the increasing rate of limiting load for scoring.