Manufacture of an Experiment Apparatus for Basic Frictional Characteristics of Bolt-nut Fastening and Some Experiments

Abstract

This report deals with sliding friction between two annular plates made of mild carbon steel under oil lubrication. This experiment was planed for examining basic frictional feature of bolt-nut fastenings. The reformed experiment apparatus is explained and experimental results obtained under conditions of sliding speed up to 60rpm and contact pressure up to 200N/mm^2 are presented. It is concluded that friction coefficient receives less influences from the above two factors and have expected values of about 0.12 to 0.14,but geometrically ill-balanced contact gives large influences.