Step drill for metal 4-20 mm SD-5820 Intertool

A step (steps) Drill - perfect assistant for delicate drilling large diameter holes in the sheet metal and plastic. The stepped structure enables drill holes of different diameters (420 mm) without changing the cutting tool. Cylindrical shank (8 mm) to allow the drill to any drill, screwdriver or a drilling machine. Highlights Saves you time and effort. A drill bit 9 may be drilled with different diameters (4, 6, 8, 10, 12, 14, 16, 18, 20 mm). Long service life. Step drill made of high speed steel (HighSpeed ​​Steel). Drilling without slipping. A cylindrical shank with the milling groove under the presser foot holder. step 4 mm in depth allows for the through-holes in different profiles, pipes and sheet materials. The drill has a conical shape with an increasing diameter of 2 mm per step. The cutting edges of high speed steel HSS, effectively do their job, and remain sharp for a long time. If necessary, the drill can be sharpened. The bends at the cutting edge (between each step) allow to eat through the chamfer, thereby the material is not deformed, and the holes are obtained even, without burrs. Two wide grooves easily discharged chips and provide cooling of the working part of the tool. Inside one of the grooves applied to range of diameters, which considerably simplifies the operation. If you do not overload the drill and use the high turnover smazochnoohlazhdayuschie fluid (coolant), it is guaranteed to last longer. Take the step drill in your tool kit, and it is sure you will find useful.