Bosch 3 Piece HSS-AlTiN Step Drill Bit Set

The Bosch 3 Piece HSS AlTiN Step Drill Bit Set is a professional grade drilling solution that allows tradespeople to drill multiple hole diameters using a single bit, eliminating the need to swap between tools mid task. Each bit features a split point tip for a clean, self starting entry into material without pre punching, and a CNC ground spiral flute that optimises chip removal whilst reducing vibration during operation. Axial and radial relief grinding ensure the highest levels of cutting smoothness and consistency across each step. The bits are manufactured from HSS high speed steel and coated with AlTiN Aluminium Titanium Nitride, which extends working life significantly, particularly when used with coolant. Laser marked diameter figures in both spiral flutes remain clearly visible throughout the life of the bit, making it easy to identify the correct step at a glance. This set is suited to working with thin materials including sheet steel, stainless steel, non ferrous metals, sheet plastic, and plastic. The 3 flat shank design prevents rotation in the chuck, ensuring secure high torque transmission in both rotary drills and drivers. The set covers step diameter ranges of 4 12 mm, 4 20 mm, and 6 30 mm, making it a versatile option for electrical, fabrication, and general contracting work. Features and Benefits • HSS AlTiN coating extends bit life and performs well when used with coolant • Split point tip enables a clean, self starting entry without pre punching • CNC ground spiral flute reduces vibration and improves chip evacuation • Axial and radial relief grinding delivers consistent cutting smoothness across each step • 3 flat shank prevents slipping in the chuck for reliable high torque transmission • Laser marked diameter figures in both flutes remain legible throughout the bits working life • Three bit set covers 4 12 mm, 4 20 mm, and 6 30 mm step diameter ranges Specifications Version HSS AlTiN Total length 66.5 mm 70.5 mm 93.5 mm Shank diameter 6 mm 8 mm 10 mm Step height 4 mm all bits Step diameter range 4 12 mm 4 20 mm 6 30 mm Net weight 0.386 kg Contents HSS AlTiN step drill bit 4 12 mm step diameter, 6 mm shank diameter HSS AlTiN step drill bit 4 20 mm step diameter, 8 mm shank diameter HSS AlTiN step drill bit 6 30 mm step diameter, 10 mm shank diameter...Read More...»»