焼付きに及ぼす潤滑油粘度の影響

抄録

Though the effects of oil viscosity, which is an important factor for oil film formation, on the scoring resistance of gears have been examined, in the former studies the significant influences of specific sliding on the antiseizure capacities of lubricating oils were not taken into account. Thus, in this paper, as a basic study to establish the design for the scoring of gears, the effects of oil viscosity on antiseizure capacities of mineral base oils are examined by two-cylinder tests under various specific slidings. Though in the higher specific sliding range the antiseizure capacity rises with an increase in oil viscosity, in the lower range the effects are minute and thin oils are also applicable to the severe conditions of heavy load, higher sliding velocity, and higher bulk temperature where thick EP oils are ordinarily used. A method is proposed for applying these results to the scoring design of case-hardened spur gears.