Bosch HSS Step Drill Bit

The Bosch HSS Step Drill Bit delivers smooth, burr-free drilling in several diameters with a single bit. It suits deburring, drilling round holes and enlarging existing ones. Available in sizes from 4mm to 40.5mm, there is an option for a wide range of job requirements.

The split-point tip allows an easy start without pre-punching. The CNC ground spiral flute supports optimised chip removal and less vibration for even drilling. Axial and radial relief grinding provides the highest cutting performance and absolute smoothness.

This step drill bit is suitable for thin materials, including non-ferrous metals, sheet plastic, sheet steel, plastic and stainless steel. It is made from HSS (high-speed steel) and offers a long lifetime when used with coolant. Laser-marked figures in both spiral flutes give easily visible, durable hole diameter markings. The 3-flat shank prevents slipping in the chuck and provides powerful high-torque transmission.

Features and Benefits:
• Smooth drilling in several diameters with one drill bit
• Split-point tip for an easy start, with no pre-punching required
• 3-flat shank prevents slipping in the chuck of rotary drills and drivers
• CNC ground spiral flute for optimised chip removal and less vibration
• Axial and radial relief grinding for the highest cutting smoothness
• HSS construction for a long lifetime when used with coolant
• Laser-marked hole diameters for easy identification