Two Measurement Techniques used in the Evaluation of Cutting Fluids

Various criteria have been used in metal cutting operations to study the effectiveness of cutting fluids; for example, tool-life, wear, temperature and forces; work surface finish; and chip deformation. In each case a number of measurement methods may be employed. This paper describes two very simple means of measurement which have been found useful in cutting fluid research. The first is based on measurement of work surface finish in the direction of cut by determining the amount of pencil lead abraded by the surface under controlled conditions. The second is based on measurement of chip deformation by electrical resistance determination of chips from a known depth of cut. Contributed by the ASLE Technical Committee on Metal Working Fluids and presented at the Annual Meeting of the American Society of Lubrication Engineers held in Buffalo, New York, April 1959.