Step drill HSS No. 1, Ø4-12mm (steel/cast iron)

• For burr-free drilling and reaming of sheet metal, pipes and sections and one-sided deburring in a single operation
• The exact bore diameter results from the cylindrical graduation, the ground section of each step deburrs the next smaller bore diameter
• Point thinning in accordance with DIN 1412 C
• Especially suitable for use on hand drills when drilling thin materials
• Corner breakers for double-sided deburring (up to 1.5 mm sheets)
• No need for pre-drilling or center punching even with curved surfaces
• Straight shank with 3 driving planes prevents “slipping” in the chuck
• Laser scaling of bore diameters and rotational speed data
• Note: material thickness suitable up to 5 mm

Usage characteristics

• aluminum < 8% Si
• aluminum >= 8 % Si
• brass short
• cast iron GG/GTS
• cast iron GGG
• stainless steel ferrit./martens.
• steel < 1000 N/mm2
• steel < 1400 N/mm2
• steel < 700 N/mm2