Bosch Hex Shank HSS-TiN Step Drill Bit

The Bosch Hex Shank HSS-TiN Step Drill Bit is a versatile cone drill bit designed to produce smooth, burr-free holes across multiple diameters using a single bit — eliminating the need to swap tools mid-job.

The split-point tip bites cleanly into material without pre-punching, making it well suited for sheet steel, stainless steel, non-ferrous metals, sheet plastic, and similar thin materials. Its CNC-ground spiral flute ensures efficient chip removal and reduced vibration for consistent, controlled drilling throughout the cut.

Manufactured from HSS (high-speed steel) with a TiN (titanium nitride) coating, this step drill bit offers extended tool life — particularly when used with coolant. Axial and radial relief grinding delivers the highest level of cutting smoothness, whether you're drilling fresh holes or enlarging existing ones.

The ¼" hex shank provides a secure, slip-free connection in both three-jaw chucks and ¼" internal hex tool holders. Laser-marked diameter figures in both spiral flutes remain clearly legible throughout the life of the bit, making it easy to drill to an exact size every time.

Features and Benefits:
• Drills multiple diameters from 4–20mm with a single bit — 4mm step increments
• Split-point tip for immediate bite without pre-punching or centre marking
• CNC-ground spiral flute for optimised chip evacuation and reduced vibration
• Axial and radial relief grinding for smooth, burr-free cutting performance
• HSS-TiN construction for durability and extended working life
• ¼" hex shank compatible with three-jaw chucks and hex tool holders
• Laser-marked diameter figures on both flutes for quick, accurate size identification

Specifications:
Total Length: 70.5mm
Shank Diameter: ¼" (inch)
Version: HSS-TiN
Step Height: 4mm
Step Diameter Range: 4–20mm
Net Weight: 0.077kg