The effect of some lapping parameters, such as: abrasives size, lapping pressure and lapping speed, on the residual stress at surface of work-pieces was discussed.

Proper use of the Extenders will reduce lapping time, and extend the life and surface area of the diamond resulting in less diamond product usage.

Through experiments of high speed lapping with solid abrasives, the effect of lapping pressure on machined surface roughness is studied in this paper.