Shaving is the application of cross-axis helical gear mesh theory, the use of tooth surface with a small slot with the cutting ability of tools and gear to be machined parts free of the roll gap without mating, through the use of feed pressure and relative slip between the mating tooth surfaces have the cutting action to remove the metal processing. In theory, the tool and the workpiece meshing tooth surface is a point of contact, but shaving process, under pressure in the feed will contact point at the tool and the workpiece material to produce elastic and plastic deformation, making the gear tooth surface point of contact for small oval extended surface contact area.
If the shaving cutter and the workpiece rotate only in situ, can only shave the tooth surface of the workpiece out of a narrow area, to shave a full gear tooth surface, shaving the use of bench along the axial axis of the workpiece relative to the tool do the axial reciprocating motion to achieve, after each trip back and forth along the axis of the vertical direction to do two radial feed, shave the requirements of the tooth thickness.
We can see from the above principle shaving, shaving gear tooth axial theoretically point contact between the cutting process under pressure in the feed tooth surface extension under load for a relatively small contact area of an oval face, if the workpiece and the razor only rotate in place, only the tooth surface of the workpiece with a shaving razor blade cutting width equidistant narrow shave marks. If the special shaving blade design to match the workpiece to maintain full-gear tooth meshing contact with a wide line, cutting edge groove along the circumference and then screw dislocation arrangement, so that you can make the shaving cutter and workpiece rotation in place can only shave the entire width of the workpiece tooth for tooth thickness shaved to the required size, you can only radial feed, this method is radial shaving shaving.