Abstract
The contact area of a braid and processing work was derived geometrical,and the agreement with the spindle current level that was the processing resistance index was considered. The current level shows a change of the triangular wave type from the trapezoid wave pattern and the maximums increased with the cut depth addition,and then this behavior agrees with a blade contact area for the processing work. Moreover,the contact area on the braid side predominantly contributes to the processing resistance in the cut 0.5mm or more depth.
