Abstract: A superfinishing machine using lapping film applied in superfinishing of the surface to be polished of the work which is rotated or turned reciprocally. The rotating direction of a pair of take-up reels for lapping film is changed over and controlled by the driving changeover means, and in cooperation with this changeover control, the follower friction wheels becoming the driven side are controlled by braking means. As a result, the whole grain surface of the lapping film can be used effectively. Besides, excessive withdrawal of the lapping film can be effectively prevented. There is also pressing means for pressing the lapping film against the surface to be polished of the work, so that high-precision polishing along the contour of the surface is realized.

Abstract: A truing device that can form surfaces of hones, installed in a honing tool, into R-shapes (i.e. provided with rounded off edges or corners) with the same diameter as that of the honing tool or plane shapes. A truing tool is provided with a penetrating hole through which the honing tool is inserted and at least a part of an inner surface of the penetrating hole is a cylindrical surface having the same diameter as that of the honing tool and at least a part of said penetrating hole inner surface is provided with cutting edges for hone grinding. A tool holder housing the truing tool attachably and removably is held in a jig body of a tool holding device in a manner that the tool holder can shake within a range of three dimensional minute angles, thereby allowing said truing tool to smoothly follow movement of said honing tool during truing.