Abstract
Recently, the high temperature lubrication of rolling bearings using powder solid lubricants have been investigated, and we have studied and reported it. For the purpose of obtaining the fundamental data about the high temperature lubrication of rolling bearings lubricated with solid lubricants, rolling friction is measured using a simple rolling friction apparatus in which two balls are rolled between the two flat surfaces under load. The experimental results obtained are as follows : Taking the rolling resistance F, load on ball W, diameter of ball D, Brinell hardness number of flat surface PH, F is proportional to W1.5, D-1.7 and PH-2.0 respectively. There exist the most suitable quantities of lubricants, and the rolling resistance increases rapidly when the quantities of lubricants exceed the most suitable quantities. Allowable load capacity of contact point between ball and flat surface is increased owing to the lubrication with solid lubricant. We are able to comfirm the lubrication performances of solid lubricants by means of microscopic observation of grooved track.
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