During drill punch operating being the housing which possesses with the device null

摘要

[Challenge] [MEANS FOR SOLVING PROBLEMS] An apparatus for can be used with automated manufacturing or machine (15) drills, to regulate the advancement of the drill drilling operation, the housing including stop cage (2a) and spindle (3), the device, the spindle a housing which is mounted axially movably and rotatably in the housing, which is arranged to regulate the advance, and a stop adjustable in the axial direction, and (9), the present invention, the stopper cage ( and a chip breaking tool for 2a) is to destroy the chip (13), chip breaking tool (13), and a free end portion and the housing end, dish fir part its free end portion (12b) It is another object to extend substantially radially toward (step drill bit 12) drilling tool from outside the immediate vicinity of the surface and substantially parallel to the work surface to be substantially in contact with. Damage to the surface of the workpiece is prevented by the present invention, thus, re-finishing of the corresponding surfaces is avoided. Also, were required for each drilling cycle after conventional labor of removal of the coil from the tip of the drill bit are eliminated. [Selection] Figure Figure 1