Description of productsTechnical Information 24. The mechanism for a tap to cut over size on an internal thread 3. Tapping with an improper feed condition over-cutting at axial direction Process of over-cutting due to excessive feed With cutting edge b1, cutting starts. Workpiece Cutting part by b1 Not Go gauge Excessive-cutting of the thread Tap with excessive feeding Position between workpiece and tap after the tap rotates 1 turn. Distance of excess feeding Workpiece Cutting trace by b1 Tap Position between workpiece and tap after the tap rotates 2 turns. Workpiece Distance of excess feeding Tap The position between workpiece and tap after 3 rotations of tap. Over-cutting of the thread by too slow feeding Not Go gauge Workpiece Distance ofexcess feeding Process Opposite of excessivefeedingFactorsinfluencingextra material is cut at back frank. over-cutting during tapping Tap The tap mounting condition in the holder. The condition of bored hole. Solutions The cutting oil selection. Feed adjustment is strongly recommanded. Incorrect adjustment of feed balance. *(Use fully synchronous feed system and fixing holder) Selection of the tap depending on material When using machines that do not have the being cut. synchronous feed system, such as drilling machine. *Adjust the correct weight balance of main spindle properly. *Use an axial/radial floating holder for adjustment. Technical-82