Bosch HSS-TiN Step Drill Bit

The Bosch HSS-TiN Step Drill Bit delivers smooth, burr-free drilling across multiple diameters with a single bit — eliminating the need to swap tools mid-job. Ideal for deburring, drilling round holes, and enlarging existing ones, the split-point tip enables an easy, accurate start without pre-punching.

The CNC ground spiral flute ensures optimised chip removal and reduced vibration, while axial and radial relief grinding guarantee the highest cutting performance and absolute smoothness. Suitable for thin materials including non-ferrous metals, sheet plastic, sheet steel, and stainless steel.

Constructed from HSS (high-speed steel) and coated with TiN (Titanium Nitride), these bits offer an exceptionally long service life, especially when used with coolant. Laser-marked diameter figures on both spiral flutes provide clear, durable hole size identification, and the 3-flat shank prevents slipping in the chuck for reliable, high-torque transmission. Available in sizes ranging from 4mm–12mm up to 6mm–40.5mm.

Features and Benefits:
• Smooth, burr-free drilling across multiple diameters with one bit
• Split-point tip for easy starts — no pre-punching required
• CNC ground spiral flute for optimised chip removal and reduced vibration
• Axial and radial relief grinding for highest cutting smoothness
• HSS construction with TiN coating for an exceptionally long service life
• Laser-marked diameter figures on both flutes for clear, durable identification
• 3-flat shank prevents chuck slippage and provides high-torque transmission
• Suitable for non-ferrous metals, sheet plastic, sheet steel, and stainless steel